Slot diffusers, Round duct diffusers. IMP Klima

Transcription

1 , Round duct diffusers 04 Round duct diffusers 176

2 , Round duct diffusers SLOT DIFFUSERS, ROUND DUCT DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS CIRCULAR DIFFUSERS, SQUARE DIFFUSERS VENTILATING GRILLES, VENTILATING VALVES, Round duct diffusers are designed for air supply in rooms with floor to ceiling heights of.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems. Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air. AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 177

3 , Round duct diffusers Overview are designed for air supply in rooms with floor to ceiling heights of.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems. Nozzle diffusers Nozzle diffusers LD-19 are designed for supply of warm or cold air and can be mounted in the wall or in the ceiling. Adjustable deflectors allow us to set different directions of air discharge. Nozzle diffusers LD-0 are designed to supply low quantities of air on big window surfaces to prevent condensation (ceiling installation near windows) or for big throws for cooling when wall installation (Coanda effect). Panel design slot diffusers A panel design slot diffuser consists of a face plate and a plenum box. Cylindrical air deflectors, equal to those in LD-1 and LD-14 diffusers, are installed in the slots, to allow continuous adjustment of discharged air direction within the 60 range. On order, diverse plate designs and slot patterns are available. Round duct diffusers Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air. Software: KLIMA ADE LD and SKD Software: available calculation and graphical display of air supply for slot diffusers LD-1, LD-14 and LD-15 available calculation of technical specifications for the application of wall- or ceiling-mounted slot diffusers available calculation of ceiling-mounted multiple-diffuser configuration air supply application of vertical or horizontal slot diffuser air supply into the room, depending on the mode of operation heating or cooling the package supports basic air supply mode models for the SKD-1 round duct diffuser available calculation of SKD-1 round duct diffusers cooling mode: single-side and two-side horizontal supply and alternating horizontal supply heating mode: vertical air supply Software: Klima ADE LD-1 LD-14 LD-15 LD-18 Nozzle diffusers LD-19 LD-0 Floor slot diffusers LD-16N Panel design slot diffusers Floor slot diffusers LD-16N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installation in the floor. Warm air is supplied in the upwards direction, towards the window. LDP-14 Round duct diffusers SKD-1D 178

4 , Round duct diffusers Content VENTILATING GRILLES, VENTILATING VALVES SLOT DIFFUSERS 180 LD-1, LD LD LD-17, LD Nozzle diffusers LD-19 1 Nozzle diffusers LD-0 19 Floor slot diffusers LD-16N 0 Panel design slot diffusers LDP-1, LDP-14 ROUND DUCT DIFFUSERS 4 Round duct diffusers SKD-1 4 Page SUPPLY AIR NOZZLES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Legend of symbols AI Element is made of aluminium profiles, aluminium sheet or aluminium casting. Element is intended to be built in the wall. Element is suitable for the supply of cool air (cooling). EXTERNAL ELEMENTS St RAL 9010 Element is made of steel sheet. Element is powder painted in standard RAL 9010 colour. Other desired colour is to be specified in the order. Element is intended to be built in the ceiling or in the wall. Element for air conditioning of rooms with floor to ceiling heights room up to 4 m. M F EU... Element allows regulation by electric motor (Belimo electric motors). Element is intended for air filtration. The filter of class is built in. AIR FLOW CONTROL UNITS Shady symbol means possibility of optional material, surface protection, motor version, Element is intended to be built in the floor. Element for air conditioning of rooms with floor to ceiling heights from 6 to 15 m. Element is suitable for the supply of warm air (heating). CD INOX The possibility of the automatic selection and calculation of the technical characteristics of grilles and difusers in regard to the given conditions with the assistance of the Klima ADE program. The element is made of stainless sheet steel AISI 04. SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 179

5 , Round duct diffusers LD-1, LD-14 Application LD-1 and LD-14 slot diffusers are designed for the supply of air in rooms with floor to ceiling heights of.5 to 4 m for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems. AI Description LD-1 and LD-14 slot diffusers are designed in 1,, and 4-slot versions. Diffuser face plate consists of anodised aluminium sections with built-in cylindrical deflectors made of plastics. Deflectors allow continuos adjustment of discharged air direction within the 60 range as well as control of supply air flow rate. The cylindrical deflectors also allow full shutting of the diffuser. The slot diffuser plenum box is made of galvanised sheet steel and has a flow rate control damper built in its inlet spigot, to allow fine adjustment of the desired air flow rate. RAL 9010 CD B 60 1 LD-1 F Control schematic of the spigot volume control damper φ D H H1 41 a A E 7 LD-14 F LD-14 F A 7 E Plenum box. Inlet spigot. Volume control damper 4. Main section 5. Cylindrical deflector 6. Side lateral section 7. Connecting section 8. Outside insulation A 7 E 180

6 , Round duct diffusers Slot diffuser types Single-slot (designation LD-1,14/1) Two slots (designation LD-1,14/) Three-slots (designation LD-1,14/) Four-slots (designation LD-1,14/4) LD-1 O, LD-14 O Narrow version The narrow slot diffuser differs from the conventional slot diffuser construction as regards its mounting to the ceiling or wall. The conventional slot diffuser has a L-cross-section mounting sleeve which remains visible and may, in certain applications, interfere with aesthetic requirements. The narrow design has eliminated this deficiency as well as introduced improved structural rigidity due to its reinforced sleeve. The product is thus suitable for installation in cooling suspended ceilings as well. LD-1/1 LD-14/1 LD-1 O/ 1 LD-1 O/ LD-1 O/ LD-1 O/ LD-1/ LD-1/ LD-1/4 LD-14/ LD-14/ LD-14/ LD-1 O, LD-14 O LD-14 O/ 1 LD-14 O/ LD-14 O/ LD-14 O/ LD-1, LD-14 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Standard lenghts L LD-1 and LD-14 slot diffusers are available in standard lengths ranging from L=00 to L=000 mm, with a mm step. In cases where longer diffusers are required, they can be joint together by means of (rail-type) connecting plates. Plenum boxes are also available in standard lengths ranging from 00 mm to 000 mm. Special orders On customer s request slot diffusers can be made in other dimensions. End seals and longitudinal sections are painted in any RAL scale colour according to the customer s request. As standard, cylindrical deflectors are black or white, on the customer s request, they can be coloured in any RAL scale colour. Non-standard colours and extra components are to be ordered separately. LD-1 No. of slots H H1 B A E F LD-1 No. of slots H H1 B A E F SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 181

7 , Round duct diffusers Number and diameter of inlet spigots L 00 do 0 1 do do 000 Number and diameter of inlet spigots No. of slots LD-1 LD-14 LD-1 LD-14 LD-1 LD x 98 1 x 1 x 98 x 1 x 1 x 18 1 x 18 1 x 158 x 1 x 18 x 18 x x x 198 x 18 x 158 x 158 x x x x 158 x 198 x 198 x Position of inlet spigots Number of inlet spigots Standard length Position of spigots J L/ L/ J L/ 1 10 J = J = 0 Slot diffuser face plate designs Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls. angle Cylindrical deflectors Cylindrical deflectors are an important components of a slot diffuser. They allow adjustment of both air flow rate and direction. Cylindrical deflectors are made of plastics. As standard, they are black or white. End seals End seals are components of the diffuser face plate. They are available in two designs: as an angle piece (E on both ends, ET on one end only) or plates (F on both ends, FT on one end only). The connecting strip-section has no end angle pieces or plates seals (designation T). Joining diffusers together in length and width Joining in width (into diffusers with multiple slots) requires special strip sections, while joining in length requires connecting plates (the total length of combined diffusers is not limited). 18

8 , Round duct diffusers Fixing of the plenum box onto LD-1, LD-14 diffusers With self-tapping screws (designation U) With spring clamps (designation S) With a cross-member (designation Z) Fixing with self-tapping screws (U) Fixing with spring clamps (S) Fixing with a cross-member (Z) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS Installation methods With a threaded bar (designation R) With a wire (designation R) With suspension brackets on the plenum box (designation P) With special fixing elements (designation R) With springs (designation N) Installation with a threaded bar (R) Installation with wire (R) Installation with suspension bracket (P) SUPPLY AIR NOZZLES SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Installation with special fastening elements (R) Installation with springs into ducts (N) SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS 18

9 , Round duct diffusers Types of air discharge LD-1 a b Discharge direction Min. air flow rate Max. air flow rate Standard (left, right) Standard (right) c d 101 Discharge angle LD-14 Standard (left) Standard (vertical) Discharge direction Min. air flow rate Max. air flow rate e f g Discharge angle Air jet angle 60 (left, right) Air jet angle 60 (right) Air jet angle 60 (left) Slot diffuser with actuator controlled discharge direction with actuator controlled discharge direction are suitable for summer-winter air supply applications. The desired direction of air jet is achieved by means of an electric actuator which moves a slider. Manual adjustment is therefore not necessary. Compared with standard slot diffusers, air flow rate is reduced by %. There are two options for the Belimo electric motors: LH 4A-SR and LH-4A-MP. The first operates at 4V AC/DC, the second within the range of 0-10V or 0-V. Their travel distance is mm, for which 1 s is required. 1 Pogled Top view z vrha Component parts 1. Slot diffuser. Deflector. Electric actuator In case the discharge angle is to be adjustable by means of an electric actuator (winter-summer application), this requirement shall be specified in the ordering form. * Motor version on customer s request. Every second row 1. Adjustment of deflectors for warm air supply Every second row. Adjustment of deflectors for cold air supply 184

10 , Round duct diffusers Ordering key LD-1/1/B/E/K/M/S/P/I/g L=1700 VENTILATING GRILLES, VENTILATING VALVES Length L=00, 0, 0,, 000 (single piece) Type of air discharge (a, b, c, d, e, f, g) I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material) I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) N Installation with spring clamps without plenum box (LD-1 and LD-14 only) P Installation of the plenum box with hangers R Installation with brackets built in the basic section Z Fixing of the diffuser to the plenum box with a cross-member S Fixing of the diffuser to the plenum box with spring clamps U Fixing of the diffuser to the plenum box with self-tapping screws M Volume control damper K Plenum box E End sealing on both ends ET End sealing on one end F End plate on both ends FT End plate on one end T Rail-type without end sealings and plates B Black deflectors W White deflectors 1 Number of slots 4 LD-1 Slot diffuser LD-14 LD-1 O Narrow slot diffuser LD-14 O Note: Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. For the LD-1 0 and LD-14 0 type, the following end seals are available: F, FT and T. When installing in cooling ceilings, consult the manufacturer. In the case the slot diffuser is ordered complete with plenum box, the air jet configuration is set as shown on the drawing on page 184. Versions with insulation on the inside of the plenum box are also available. CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 185

11 , Round duct diffusers Wall mounted slot diffusers LD-1S and LD-14S 4 Application Designed for installation in plasterboard walls with a thickness of mm or more. These are used for the supply of air in rooms with ceiling heights of.5 to 4 m. Suitable for cooling as well as for heating, especially in rooms with elevated comfort requirements. They may also be used to discharge the air from the room, and enable a high level of induction. 1 1 Description Inlet or outlet connection may be in the plenum box above the ventilated room or on the other side of the wall. On the diffuser side, the plenum box is sound-insulated, lowering the level of noise emissions in the ventilated room. Component parts 1. front chamber connection (KF) 1. rear chamber connection (KB). slot diffuser LD-1S or LD-14S. sound insulation 4. plenum box Plenum box Despite its low height, it assures sufficient air distribution in the direction from the plenum box connection to LD-1 or D-14 across the entire length of the diffuser. It can be installed in plasterboard walls with a minimum thickness of mm. Design allows installation and placement on metal profile brackets of internal plasterboard walls. Installation in the plasterboard Front plenum box connection Front plenum box connection allows air inlet and outlet above the suspended ceiling of the ventilated room. This assures a certain competitive advantage, as there is no need to adjust the duct network to the diffuser placement. Rear plenum box connection Rear side connection allows air inlet and outlet through the neighboring room. Due to the height of the connector according to LD-1 o LD-14, the duct network can be placed above the suspended ceiling. Dimensions B1 B L Sound insulation Sound insulation has enhanced absorption properties and prevents the spreading of emissions from the duct network into the ventilated room. The insulation placement effectively reduces internal noise generation in the entire plenum box, particularly on the location of the inlet jet through the connection. H M1 H B H (mm) H1 (mm) H (mm) B (mm) B1 (mm) B (mm) L (mm) ΦD (mm) LD-1S/ LD-14S/ LD-1S/ LD-14S/

12 , Round duct diffusers Ordering key LD-1S/1/B/E/K/I5 L =0 VENTILATING GRILLES, VENTILATING VALVES Length I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material) I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) KF Plenum box, front side connection KB Plenum box, back side connection E End sealing on both ends ET End sealing on one end F End plate on both ends FT End plate on one end T Rail-type without end sealings and plates B Black deflectors W White deflectors 1 Number of slots S For wall installation LD-1 Slot diffuser type LD-14 Note: Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. Versions with insulation on the inside of the plenum box are also available. SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS 187

13 , Round duct diffusers Fast selection diagram: L WA < 5 db(a) Technical specifications for one-slot diffuser, per meter of lenght, at horizontal discharge A(m²) Q(m³/h) L WA (db) LD LD Nr. Število of slots rež 4 1 LD-1 LD Q(m /hm) Definition of symbols A L L x L x A L x Q (m³/hm) Air flow rate to length x (m) Horizontal distance to the wall H (m) Room height L (m) Throw distance (L=H1+x) VL (m/s) Air velocity at the throw distance L Δt z (K) Temperature difference between the supply and room air Δt L (K) Difference between the core and room air temperature Δp (Pa) Pressure drop L WA (db(a)) Sound power level v H1 (m/s) Air velocity at the distance H1 A, B (m) Distance between diffusers, in length and in width H1 (m) Throw distance H1 VH1 th VL tl VL tl H1 VH1 th VL tl 188

14 L L, Round duct diffusers Air velocity diagrams for LD-1, at different throw distances One or two sided horizontal discharge VENTILATING GRILLES, VENTILATING VALVES H1 (m) LD-1 / LD-1 / LD-1 / LD-1 / (m³/hm).5 LD-1 / LD-1 / LD-1 / LD-1 / (m³/hm) CIRCULAR DIFFUSERS, SQUARE DIFFUSERS 0.8 V H1 (m/s) A (m) V (m/s) L (m) SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Alternate sided horizontal discharge V H1 (m/s) H1 (m) LD-1 / LD-1 / LD-1 / LD-1 / A (m) (m³/hm) V (m/s) LD-1 / LD-1 / LD-1 / LD-1 / (m³/hm) AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS L (m) AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 189

15 L L, Round duct diffusers Air velocity diagrams for LD-14, at different throw distances One or two sided horizontal discharge H1 (m) 1.6 / 1 / LD-14 / 1 LD-14 / (m³/hm).5.5 (m³/hm) 0.8 V H1 (m/s) A (m) 7 10 A (m) A (m) V L (m/s) V L (m/s) L (m) L (m) L (m) Alternate sided horizontal discharge H1 (m) (m³/hm).5 LD-14 / 1 LD-14 /.5 LD-14 / 1 LD-14 / (m³/hm) V H1 (m/s) V (m/s) V (m/s) A (m) A (m) L (m) L (m) 190

16 t, Round duct diffusers Sound power level and pressure drop LD 1/1 LD 1/ p (Pa) L w A (db(a) ) Q (m /h) Correction factors applicable to LD-1/ p t (Pa) 00 0 L w A (db(a) ) Q (m /h) Correction factors applicable to LD-1/ VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x 1.44 x 0.87 x 1.4 L=0 x 1 x.0 x 0.85 x.0 L=10 x 1 x 5.6 x 0.84 x 4.47 L=000 x 1 x 7.7 x 0.81 x 5.68 Example Q = 1 m³/h L = 0 mm Δp t = 14 Pa (vertical; damper opened) Δp t = 14 x.0 = 46. Pa (vertical; damper closed) Δp t = 14 x 0.85 = 11.9 Pa (horizontal; damper opened) Δp t = 14 x.0 = 4. Pa (horizontal; damper closed) L WA = db(a) Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x 1.91 x 0.86 x 1.79 L=0 x 1 x 5.91 x 0.70 x 5.1 L=10 x 1 x 9.88 x 0.58 x 8.67 L=000 x 1 x x 0.47 x Example Q = 1 m³/h L = 0 mm Δp t = Pa (vertical; damper opened) Δp t = x 1.91 = 4.0 Pa (vertical; damper closed) Δp t = x 0.86 = 18.9 Pa (horizontal; damper opened) Δp t = x 1.79 = 9.4 Pa (horizontal; damper closed) L WA = 0 db(a) SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS 191

17 t t, Round duct diffusers Sound power level and pressure drop LD 1/ LD 1/4 p (Pa) L w A (db(a) ) Q (m /h) p (Pa) 00 L w A (db(a) ) Q (m /h) Correction factors applicable to LD-1/ Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x.7 x 0.84 x.4 L=0 x 1 x 8.5 x 0.56 x7.59 L=10 x 1 x 14. x 0. x 1.86 L=000 x 1 x 0.8 x 0.18 x 18.9 Correction factors applicable to LD-1/4 Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x.08 x 0.70 x.91 L=0 x 1 x x 0.47 x 9.87 L=10 x 1 x x 0.7 x 16.7 L=000 x 1 x 7.07 x 0.15 x.78 Example Q = 00 m³/h L = 0 mm Δp t = 15 Pa (vertical; damper opened) Δp t = 15 x 8.5 = 17.8 Pa (vertical; damper closed) Δp t = 15 x 0.56 = 8.4 Pa (horizontal; damper opened) Δp t = 15 x 7.59 = 11.8 Pa (horizontal; damper closed) L WA = 9 db(a) Example Q = 00 m³/h L = 0 mm Δp t = 5 Pa (vertical; damper opened) Δp t = 5 x.08 = Pa (vertical; damper closed) Δp t = 5 x 0.70 = 4.5 Pa (horizontal; damper opened) Δp t = 5 x.91 = Pa (horizontal; damper closed) L WA = db(a) 19

18 t t, Round duct diffusers Sound power level and pressure drop LD 14/1 p (Pa) L w A (db(a) ) Q (m /h) 45 0 Correction factors applicable to LD-14/1 0 Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x 1.81 x 0.76 x 1.1 L=0 x 1 x.8 x 0.4 x. L=10 x 1 x 5.80 x 0.8 x 5.11 L=000 x 1 x 7.87 x 0.19 x 7.07 Example Q = 00 m³/h L = 0 mm Δp t = Pa (vertical; damper opened) Δp t = x.8 = 16.4 Pa (vertical; damper closed) Δp t = x 0.4 = 14.0 Pa (horizontal; damper opened) Δp t = x. = Pa (horizontal; damper closed) L WA = 8 db(a) LD 14/ p (Pa) L w A (db(a ) ) Q (m /h) Correction factors applicable to LD-14/ Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x.11 x 0.5 x 1.59 L=0 x 1 x 8.84 x 0.9 x 7.96 L=10 x 1 x 15.6 x 0.0 x L=000 x 1 x. x 0.14 x 0.70 Example Q = 00 m³/h L = 0 mm Δp t = 47 Pa (vertical; damper opened) Δp t = 47 x.11 = 99. Pa (vertical; damper closed) Δp t = 47 x 0.5 = 4.9 Pa (horizontal; damper opened) Δp t = 47 x 1.59 = 74.7 Pa (horizontal; damper closed) L WA = 6 db(a) SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS 19

19 t t, Round duct diffusers Sound power level and pressure drop LD 14/ LD 14/ p (Pa) L w A (d B(A ) ) p (Pa) 0 L w A (db(a) ) Q (m /h) Correction factors applicable to LD-14/ Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x.41 x 0. x 1.87 L=0 x 1 x 1.86 x 0.19 x 1.69 L=10 x 1 x 4.9 x 0.16 x.17 L=000 x 1 x 6.76 x 0.1 x 1. Correction factors applicable to LD-14/4 Type of discharge Vertical Horizontal Flow rate control Open Closed Open Closed damper L=0 x 1 x.14 x 0.8 x.4 L=0 x 1 x 18.0 x 0.15 x 16. L=10 x 1 x.4 x 0.1 x 8.1 L=000 x 1 x x 0.10 x 9.6 Example Q = 600 m³/h L = 0 mm Δp t = 18 Pa (vertical; damper opened) Δp t = 18 x 1.86 = 49.5 Pa (vertical; damper closed) Δp t = 18 x 0.19 =.4 Pa (horizontal; damper opened) Δp t = 18 x 1.69 = 8.4 Pa (horizontal; damper closed) L WA = 8 db(a) Example Q = 600 m³/h L = 0 mm Δp t = 70 Pa (vertical; damper opened) Δp t = 70 x.14 = 19.8 Pa (vertical; damper closed) Δp t = 70 x 0.8 = 19.6 Pa (horizontal; damper opened) Δp t = 70 x.4 = Pa (horizontal; damper closed) L WA = 6 db(a) 194

20 , Round duct diffusers Slot diffuser LD-15 Application Slot diffuser LD-15 is designed to supply air in rooms with floor to ceiling heights from.5 to 4 m. They are primarily designed for the supply of cold air in applications with high comfort demands. Description LD-15 slot diffuser is of a one-slot construction. The diffuser face plate consists of aluminium sections with built-in cylindrical deflectors made of recycled plastics. Individually adjustable deflectors allow continuous adjustment of discharge angle within the 60 range, as well as adjustment of air flow rate. The diffuser air flow can be completely shut by means of the cylindrical deflectors. The plenum box is made of galvanised sheet steel. No. of spigots Standard lengths (L) 00, 0, 0, 600, 700, 800, 1 900, 0 AI RAL 9010 CD φ78 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS 1,,, 10, 10, 1600, 1700, 1800, 1900, 000 Position of inlet spigots The positions of inlet spigots are equal to those of LD-1 and LD-14 slot diffusers. See drawing and table on page AIR DISPLACEMENT UNITS Slot diffuser face plate designs Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls Plenum box. Inlet spigot. Main section 4. Cylindrical air deflector SUPPLY AIR NOZZLES Cylindrical air deflectors Cylindrical deflectors are the most important components of a slot diffuser. They allow free adjustment of the air flow rate. Joining slot diffusers together in length Sections can be joint together by means of connecting plates. Total length of so joint sections is not limited. Installation openings: 15 x L (diffuser length) EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS Joining slot diffusers together in length SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 195

21 , Round duct diffusers Fixing of the plenum box onto a LD-15 slot diffuser With self-tapping screws (designation U) With spring clamps (designation S) Installation methods Installation with suspension brackets on the plenum box (designation P) Instalaltion with suspension brackets on the main section (designation R) Fixing of the diffuser to the plenum box with self-tapping screws (U) Fixing of the diffuser to the plenum box with a spring clamps (S) Installation with suspension brackets on the plenum box (P) Installations with suspension bracket on the main section (R) Ordering key LD-15/B/K/M/S/P/I L=10 Length L=00, 0, 0, 600, 000 (single piece) I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box. I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material). P Installation of the diffuser with suspension brackets on the plenum box R Installation with suspension brackets on the main section S Fixing of the diffuser to the plenum box with a spring clamp U Fixing of the diffuser to the plenum box with self-tapping screws M Volume control damper K Plenum box B Black deflectors W White deflectors Note: Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. When installing in cooling ceilings, consult the manufacturer. Versions with insulation on the inside of the plenum box are also available. 196

22 H1 (m) L L, Round duct diffusers Technical data Free surface, per 1 m of length: Aef= m². Air flow rate per 1 m of length: Q=0-70 m³/hm. Fast selection diagram L=000 L=10 L=0 L= Q (m³/hm) Q /h) L WA <5 db(a) L WA 5-45 db(a) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS Air velocity diagrams, at different throw distances One or two sided horizontal discharge: LD-15 / (m³/hm) LD-15 / (m³/hm) SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS V H1 (m/s) Alternate sided horizontal discharge: A (m) V (m/s) L (m) AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES H1 (m) LD-15 / (m³/hm).5 LD-15 / (m³/hm) EXTERNAL ELEMENTS 0.7 V H1 (m/s) V (m/s) AIR FLOW CONTROL UNITS A (m) L (m) SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 197

23 t, Round duct diffusers Sound power level and pressure drop p (Pa) 0 L wa (db(a)) Q (m /hm) α=0 α=45 α=90 Q (m³/h) L=0 Data in the diagram L=0 Data in the diagram L=10 Data in the diagram L=000 Data in the diagram ΔP t correction (in Pa) in cases of vertical discharge α α = 0 Control damper in the inlet spigot is fully opened α = 45 Control damper in the inlet spigot is half opened α = 90 Control damper in the inlet spigot is fully closed ΔP t correction (in Pa) in cases of inclined discharge α=0 α=45 α=90 Q (m³/h) L=0 Data in the diagram L=0 Data in the diagram L=10 Data in the diagram L=000 Data in the diagram α α = 0 Control damper in the inlet spigot is fully opened α = 45 Control damper in the inlet spigot is half opened α = 90 Control damper in the inlet spigot is half opened 198

24 , Round duct diffusers LD-17, LD-18 Application LD-17 and LD-18 are designed for supply of cold or warm air in rooms with a height between.5 m and 4 m. They allow easy setting of air deflectors for different modes of operation and can be mounted to ceiling or wall. Description LD-17 and LD-18 slot diffusers are designed in 1,, and 4-slot versions. The unit s front consists of anodised aluminium profiles (on customer s request, these can be powder painted in RAL 9010 or another colour). The individually adjustable air deflectors are made of plastic in white (RAL 9010) or black (RAL 9005) colour). Plenum box is made of galvanised sheet steel. LD-17 and LD-18 are made in standard lengths: from 00 up to 000 mm with a mm step (any length available upon request). Nominal air volume per 1 m of slot: LD-17 1 m³/h LD m³/h (Δp t = 0 Pa, NR = 5 db) 1. Plenum box. Inlet spigot. Volume control damper 4. Side section 5. Cylindrical deflector 6. Intermediate section 7. Connecting bar 8. Insulation (entire outside surface of the plenum box) 8 1 B 60 ØD H H H1 4 5 A F VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES LD-17 b= b 18 E EXTERNAL ELEMENTS No. of slots A F E B H H1 H AIR FLOW CONTROL UNITS LD-18 b=6.5 No. of slots A F E B H H1 H SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 199

25 90, Round duct diffusers Number and diameter of inlet spigots L 00 to 0 1 to to 000 Number of slots Number and diameter of inlet spigots LD-17 LD-18 LD-17 LD-18 LD-17 LD x98 1x1 x98 x1 x1 x18 1x18 1x158 x1 x18 x18 x158 1x158 1x198 x18 x158 x158 x x198 1x x158 x198 x198 x Position of inlet spigots J L/ L/ J Number of spigots Standard length Position of inlet spigots L/ 1-10 J= J=0 Slot diffuser face plate designs 00 Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. 00 Joining diffusers together in length Joining in length requires connecting plates (the total length of combined diffusers is not limited). End seals End seals are components of the diffuser face plate. They are available in two designs: as an angle piece (E on both ends, ET on one end only) or plates (F on both ends, FT on one end only). The connecting strip-section has no end anglepieces or plates seals (designation T). 00

26 , Round duct diffusers Fixing of the plenum box onto LD-17, LD-18 diffusers Installation methods Fixing with self-tapping screws (U) Fixing with spring clamps (S) Fixing with a cross-member (Z) Installation with hangers (P) Installation with a cross member without plenum box (N) Types of air discharges SUPPLY AIR NOZZLES SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Vertical heating Horizontal cooling EXTERNAL ELEMENTS Different settings of the two slot model (similar combinations are possible also for diffusers with more slots). AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 01

27 , Round duct diffusers Ordering key LD-17/1/B/E/K/M/S/P I5 L=0 (length L=00, 00,, 000) I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material) I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) N Diffuser installation with a cross-member without plenum box P Installation of the plenum box with hangers Z Fixing of the diffuser to the plenum box with a cross-member S Fixing of the diffuser to the plenum box with spring clamps U Fixing of the diffuser to the plenum box with self-tapping screws M Volume control damper K Plenum box E End sealing on both ends ET End sealing on one end F End plate on both ends FT End plate on one end T Rail-type without end sealings and plates B Black deflectors W White deflectors 1 Number of slots 4 LD-17 Slot diffuser type LD-18 Note: Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. When installing in cooling ceilings, consult the manufacturer. Versions with insulation on the inside of the plenum box are also available. Quick selection diagram: L WA < 5 db(a) 4 LD-17 LD-18 število Nr. of rež slots Q (m /hm) 0

28 , Round duct diffusers Sound power level, pressure drop and throw distances LD-17 horizontal discharge Type Q [l/s] [m³/h) L WA [db (A)] 47 LD-17/1 L=0 mm Δp t [Pa] 1 4 L 0. [m] L min [m] 1.5 >15 L WA [db (A)] LD-17/1 L=0 mm Δp t [Pa] L 0. [m] L min [m] 1 >15 >15 >15 L WA [db (A)] <5 9 4 LD-17/1 L=10 mm Δp t [Pa] L 0. [m] L min [m] >15 >15 >15 L WA [db (A)] < LD-17/1 L=000 mm Δp t [Pa] L 0. [m] L min [m] >15 >15 L WA [db (A)] <5 4 4 LD-17/ L=0 mm Δp t [Pa] 11 6 L 0. [m] L min [m] >15 >15 L WA [db (A)] LD-17/ L=0 mm Δp t [Pa] L 0. [m] L min [m] >15 >15 L WA [db (A)] LD-17/ L=10 mm Δp t [Pa] L 0. [m] L min [m] >15 >15 >15 L WA [db (A)] LD-17/ L=000 mm Δp t [Pa] L 0. [m] L min [m] >15 >15 >15 >15 L WA [db (A)] LD-17/ L=0 mm Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] < LD-17/ L=0 mm Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] LD-17/ L=10 mm Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] LD-17/ L=000 mm Δp t [Pa] L 0. [m] L min [m] VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 0

29 , Round duct diffusers Type LD-17/4 L=0 mm LD-17/4 L=0 mm LD-17/4 L=10 mm LD-17/4 L=000 mm Q [l/s] [m³/h) L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] Definition of symbols Conditions for L min : L WA Dp t L 0. L min A-weighted sound power level Total pressure drop calculated to normal conditions Isothermal throw distance of supply air jet, when its velocity drops down to 0. m/s Minimum distance between diffusers, that the jet velocity is less than or equal to 0. m/s Q=600 m³/h L=0 mm Room height: H=.8 m Occupied zone height: 1.8 m Room temperature: 4 C Supply temperature: DT= -6 K Sound power level, pressure drop and throw distances LD-17 vertical discharge Type LD-17/1 L=0 mm LD-17/1 L=0 mm LD-17/1 L=10 mm LD-17/1 L=000 mm LD-17/ L=0 mm LD-17/ L=0 mm Q [l/s] [m³/h) L WA [db (A)] 47 Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] <5 9 4 Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] < Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m]

30 , Round duct diffusers Type LD-17/ L=10 mm LD-17/ L=000 mm LD-17/ L=0 mm LD-17/ L=0 mm LD-17/ L=10 mm LD-17/ L=000 mm LD-17/4 L=0 mm LD-17/4 L=0 mm LD-17/4 L=10 mm LD-17/4 L=000 mm Definition of symbols L WA Dp t L 0. (+10 C) Q [l/s] [m³/h) L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] A-weighted sound power level Total pressure drop calculated to normal conditions Isothermal throw distance of supply air jet with temperature +10K, when its velocity drops down to 0. m/s SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS 05

31 , Round duct diffusers Sound power level, pressure drop and throw distances LD-18 horizontal discharge Type LD-18/1 L=0 mm LD-18/1 L=0 mm LD-18/1 L=10 mm LD-18/1 L=000 mm LD-18/ L=0 mm LD-18/ L=0 mm LD-18/ L=10 mm LD-18/ L=000 mm LD-18/ L=0 mm LD-18/ L=0 mm LD-18/ L=10 mm LD-18/ L=000 mm Q [l/s] [m³/h) L WA [db (A)] Δp t [Pa] 4 5 L 0. [m] L min [m] >15 >15 L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] 1.8 >15 >15 L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] >15 >15 L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] >15 >15 >15 >15 >15 L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] 14 >15 >15 >15 L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] >15 >15 L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] >15 >15 >15 L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] >15 >15 >15 >15 >15 >15 >15 >15 L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] Δp t [Pa] L 0. [m] L min [m]

32 , Round duct diffusers Type LD-18/4 L=0 mm LD-18/4 L=0 mm LD-18/4 L=10 mm LD-18/4 L=000 mm Q [l/s] [m³/h) L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] < Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] L WA [db (A)] Δp t [Pa] L 0. [m] L min [m] VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Definition of symbols L WA Dp t L 0. L min A-weighted sound power level Total pressure drop calculated to normal conditions Isothermal throw distance of supply air jet, when its velocity drops down to 0. m/s Minimum distance between diffusers, that the jet velocity is less than or equal to 0. m/s Conditions for L min : Q=600 m³/h L=0 mm Room height: H=.8 m Occupied zone height: 1.8 m Room temperature: 4 C Supply temperature: DT= -6 K SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS 07

33 , Round duct diffusers Sound power level, pressure drop and throw distances LD-18 vertical discharge Type LD-18/1 L=0 mm LD-18/1 L=0 mm LD-18/1 L=10 mm LD-18/1 L=000 mm LD-18/ L=0 mm LD-18/ L=0 mm LD-18/ L=10 mm LD-18/ L=000 mm LD-18/ L=0 mm LD-18/ L=0 mm LD-18/ L=10 mm LD-18/ L=000 mm LD-18/4 L=0 mm Q [l/s] [m³/h) L WA [db (A)] 51 Δp t [Pa] 5 56 L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] < Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] < Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] < Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] Definition of symbols L WA A-weighted sound power level Dp t Total pressure drop calculated to normal conditions L 0. (+10 C) Isothermal throw distance of supply air jet with temperature +10K, when its velocity drops down to 0. m/s 08

34 , Round duct diffusers Type LD-18/4 L=0 mm LD-18/4 L=10 mm LD-18/4 L=000 mm Q [l/s] [m³/h) L WA [db (A)] < Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] L WA [db (A)] Δp t [Pa] L 0. (+10K) [m] VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS Pressure drop (valid for horizontal discharge and plenum box with % opened volume control damper) LD-17/1 LD-17/ 00 L=0 mm L=0 mm 0 10 SLOT DIFFUSERS, ROUND DUCT DIFFUSERS p t (Pa) L WA (db(a)) Q (m /h) (Pa) p t L WA (db(a)) Q (m /h) AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES LD-17/ 00 0 L=0 mm 0 10 LD-17/ L=0 mm 0 10 EXTERNAL ELEMENTS (Pa) p t L WA (db(a)) Q (m /h) (Pa) p t L WA (db(a)) Q (m /h) AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 09

35 , Round duct diffusers Correction factors LD-17/1 Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x 1.1 x 1.1 x 1.5 L WA p t x 1 x 1. x 1. x 1.5 L WA p t x 1 x 1. x 1. x 1.6 L WA p t x 1 x.9 x.0 x.7 L WA LD-17/ Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x x 1.0 x. L WA p t x 1 x. x 1. x. L WA p t x 1 x. x 1. x. L WA p t x 1 x x 1.6 x.4 L WA LD-17/ Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x.5 x 1.1 x.4 L WA p t x 1 x.6 x 1. x.5 L WA p t x 1 x.7 x 1. x.8 L WA p t x 1 x. x.5 x 6 L WA LD-17/4 Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x. x 1. x.4 L WA p t x 1 x.4 x 1. x.4 L WA p t x 1 x.7 x 1. x.7 L WA p t x 1 x 5 x 1.9 x 4. L WA

36 , Round duct diffusers Pressure drop (valid for horizontal discharge and plenum box with % opened volume control damper) (Pa) p t LD-18/ L=0 mm L ( ( ) ) 000 (Pa) p t LD-18/ L=0 mm L ( ( ) ) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS (Pa) p t LD-18/ L=0 mm 0 L ( ( ) ) Q (m /h) Q (m /h) (Pa) pt LD-18/ L=0 mm L ( ( ) ) Q (m /h) Q (m /h) SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES SUPPLY AIR NOZZLES AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS 11

37 , Round duct diffusers Correction factors LD-18/1 Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x 1 x 1 x 1.4 L WA p t x 1 x 1.1 x 1.1 x 1.4 L WA p t x 1 x 1. x 1.1 x 1.5 L WA p t x 1 x.8 x 1.9 x.6 L WA LD-18/ Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x.1 x 1 x.1 L WA p t x 1 x. x 1.1 x.1 L WA p t x 1 x. x 1.1 x. L WA p t x 1 x x 1.6 x. L WA LD-18/ Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x.5 x 1.0 x.4 L WA p t x 1 x.5 x 1.1 x.5 L WA p t x 1 x.5 x 1. x.7 L WA p t x 1 x.1 x.8 x 6.5 L WA LD-18/4 Type of discharge Horizontal Vertical Length L=0 L=0 L=10 L=000 Volume control damper Open Closed Open Closed p t x 1 x. x 1 x.4 L WA p t x 1 x. x 1.1 x.5 L WA p t x 1 x.6 x 1.1 x.6 L WA p t x 1 x 5 x 1.8 x 4. L WA

38 , Round duct diffusers Nozzle diffuser LD-19 Application Nozzle diffuser LD-19 is designed for supply of warm or cold air and can be mounted in the wall or in the ceiling. Adjustable deflectors allow us to set different directions of air discharge. Description Front plate is made of sheet steel and powder painted in white (RAL 9010) or any other RAL colour (on customer s request). Individually adjustable nozzles are made of plastics in white (RAL 9010) or black (RAL 9005) colour. Plenum box is made of sheet steel. Nozzle diffusers are made in standard lenghts (one section) from 600 up to 000 mm with mm step. φd 60 L1 B A H L L1 H1 A 1. Plenum box. Spigot. Volume control damper (M) 4. Nozzle 5. Cross bar 6. Fixing screw 7. Insulation (entire outside surface of the plenum box) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Dimensions L L No. of nozzles* * Up to length L=900mm: fixing with 4 screws. Other sizes: fixing with 6 screws. No. of rows A H1 B H SUPPLY AIR NOZZLES SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS 1

39 , Round duct diffusers Number and dimensions of spigots L No. of rows Number and dimensions of spigots fd 1 1x1 x1 x18 1x158 x18 x158 Position of inlet spigots No. of inlet spigots Standard length Position of inlet spigots J L/ L/ J L/ 1-10 J= J=0 Front plate installation With screws (V) Installation with a cross-member (Z) Installation on a cross bar can be made through the hole, in which is mounted a nozzle. Installation of a plenum box with suspension bracket (P) Types of air discharge Possible angle settings Cooling Heating Hlajenje Gretje 14

40 , Round duct diffusers Ordering key LD-19/1/B/K/M/Z/P/I5 L=0 (length L=600, 700,, 000) VENTILATING GRILLES, VENTILATING VALVES I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material) I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) P Installation of the plenum box with hangers Z Fixing of the diffuser to the plenum box with a cross-member V Visible installation (front plate without plenum box) M Volume control damper K Plenum box B Black deflectors W White deflectors 1 Number of rows with nozzles LD-19 Nozzle diffuser CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Note: Standard colour is RAL Other colours on customer s request. SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR FLOW CONTROL UNITS AIR DISPLACEMENT UNITS EXTERNAL ELEMENTS SUPPLY AIR NOZZLES 15

41 , Round duct diffusers Quick selection Sound power level, pressure drop and throw distances Horizontal discharge DT= 0K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-19/1 L=600 mm p t (Pa) / / / / L 0. (m) / / / / L min (m) / / / / L WA (db(a)) / / / LD-19/1 L=0 mm p t (Pa) / / / L 0. (m) / / / L min (m) / / / L WA (db(a)) / / LD-19/1 L=10 mm p t (Pa) / / L 0. (m) / / L min (m) / / L WA (db(a)) LD-19/1 L=000 mm p t (Pa) L 0. (m) L min (m) L WA (db(a)) / / / / LD-19/ L=600 mm p t (Pa) / / / / L 0. (m) / / / / L min (m) / / / / L WA (db(a)) / / / LD-19/ L=0 mm p t (Pa) / / / L 0. (m) / / / L min (m) / / / L WA (db(a)) / / LD-19/ L=10 mm p t (Pa) / / L 0. (m) / / L min (m) / / L WA (db(a)) LD-19/ L=000 mm p t (Pa) L 0. (m) L min (m) Definition of symbols Conditions for L min : L WA (db(a)) Dp t (Pa) L 0. (m) L min (m) Sound power level Total pressure drop Isothermal throw length of supply air jet, when its speed drops down to 0. m/s Minimum distance between diffusers, that the jet velocity is less than or equal to 0. m/s Room height: H=.8 m Occupied zone height: 1.8 m Room temperature: 4 C Supply temperature by cooling: ΔT= - 6 K L 0 (m) L 0 (m) 16

42 , Round duct diffusers Sound power level, pressure drop and throw distances Vertical discharge DT= 0K LD-19/ L=600 mm LD-19/ L=0 mm LD-19/ L=10 mm LD-19/ L=000 mm Vertical discharge DT= +5K LD-19/ L=600 mm LD-19/ L=0 mm LD-19/ L=10 mm LD-19/ L=000 mm Type Q (l/s) (m³/h) L WA (db(a)) / / / / p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / / p t (Pa) / / L 0. (m) / / L WA (db(a)) p t (Pa) L 0. (m) Type Q (l/s) (m³/h) L WA (db(a)) / / / / p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / / p t (Pa) / / L 0. (m) / / L WA (db(a)) p t (Pa) L 0. (m) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Vertical discharge DT= +10K LD-19/ L=600 mm LD-19/ L=0 mm LD-19/ L=10 mm LD-19/ L=000 mm Definitions of symbols Type Q (l/s) (m³/h) L WA (db(a)) / / / / p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / / p t (Pa) / / L 0. (m) / / L WA (db(a)) p t (Pa) L 0. (m) SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS L WA (db(a)) Dp t (Pa) L 0. (m) Sound power level Total pressure drop Isothermal throw length of supply air jet, when its speed drops down to 0. m/s L 0 (m) SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 17

43 , Round duct diffusers Sound power level and pressure drop Pressure drop by horizontal discharge and % opened volume control damper. LD 19/1 LD-19/1 00 L=600mm LD 19/ LD-19/ 00 L=600mm L WA (db(a)) 0 0 pt (Pa) pt (Pa) L WA (db(a)) Q (m /h) Q (m /h) Correction factors applicable to LD-19 LD-19/1 LD-19/ Length Volume control damper Volume control damper open closed open closed L=600 X 1 X 1. X 1 X 1.8 L=0 X 1 X 1.4 X 1 X L=10 X 1 X 1.5 X 1 X. L=000 X 1 X X 1 X.5 18

44 , Round duct diffusers Nozzle diffuser LD-0 Application Nozzle diffuser LD-0 is designed to supply low quantities of air on big window surfaces to prevent condensation (ceiling installation near windows) or for big throws for cooling when wall installation (Coanda effect). Description The front plate is made of sheet steel powder painted in white (RAL 9010) or any other RAL colour (on customer s request). Individually adjustable nozzles are made from plastic in white (RAL 9010) or black (RAL 9005) colour. Plenum box is made of sheet steel. Nozzle diffuser LD-0 can be made in standard lenghts (one section) from 600 up to 000 mm with mm step. L1 L L1 H1 A A VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS φd 60 8 B φ0 A H Plenum box. Inlet spigot. Volume control damper (M) 4. Nozzle 5. Cross-bar 6. Fixing screw 7. Insulation (entire outside surface of the plenum box) AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES L L No. of nozzles No. of rows H1 B H A EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 19

45 1 1, Round duct diffusers Number and dimensions of spigots L No. of rows Number and dimensions of spigots fd 1 1x1 x1 x18 1x158 x18 x158 Position of inlet spigots No. of inlet spigots Standard length Position of inlet spigots J L/ L/ J L/ 1-10 J= J=0 Front plate installation With screws(v) Installation with a cross-member (Z) Installation on a cross bar can be made through the hole, in which is mounted a nozzle. Installation of a plenum box with suspension bracket (P) Possible angle settings 1 1 0

46 , Round duct diffusers Ordering key LD-0/1/B/K/M/Z/P/I5 L=0 (lenght L=600, 700,, 000) VENTILATING GRILLES, VENTILATING VALVES I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) P Installation of the plenum box with hangers Z Fixing of the diffuser to the plenum box with a cross-member V Visible installation (front plate without plenum box) M Volume control damper K Plenum box B Black nozzles W White nozzles 1 Number of rows with nozzles LD-0 Nozzle diffuser CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Note: Sandard colour is RAL Other colours on customer s request. SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR DISPLACEMENT UNITS AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS SUPPLY AIR NOZZLES 1

47 , Round duct diffusers Quick selection Sound power level, pressure drop and throw distances Horizontal discharge DT=0K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm p t (Pa) / / / / L 0. (m) 6.6 > 10 > 10 / / / / L WA (db(a)) / / / LD-0/1 L=0 mm p t (Pa) / / / L 0. (m) > 10 / / / L WA (db(a)) LD-0/1 L=10 mm p t (Pa) L 0. (m) > 10 L WA (db(a)) / LD-0/1 L=000 mm p t (Pa) / L 0. (m) / L WA (db(a)) / / / / LD-0/ L=600 mm p t (Pa) / / / / L 0. (m) > 10 / / / / L WA (db(a)) / / / LD-0/ L=0 mm p t (Pa) / / / L 0. (m) / > 10 > 10 / / L WA (db(a)) / LD-0/ L=10 mm p t (Pa) / L 0. (m) / L WA (db(a)) / LD-0/ L=000 mm p t (Pa) / L 0. (m) /

48 , Round duct diffusers Sound power level, pressure drop and throw distances Horizontal discharge DT=-5K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm p t (Pa) / / / / L 0. (m) 5.1 > 10 > 10 / / / / L WA (db(a)) / / / LD-0/1 L=0 mm p t (Pa) / / / L 0. (m) > 10 / / / L WA (db(a)) LD-0/1 L=10 mm p t (Pa) L 0. (m) > 10 L WA (db(a)) / LD-0/1 L=000 mm p t (Pa) / L 0. (m) / L WA (db(a)) / / / / LD-0/ L=600 mm p t (Pa) / / / / L 0. (m) > 10 / / / / L WA (db(a)) / / / LD-0/ L=0 mm p t (Pa) / / / L 0. (m) / > 10 / / L WA (db(a)) / LD-0/ L=10 mm p t (Pa) / L 0. (m) / L WA (db(a)) / LD-0/ L=000 mm p t (Pa) / L 0. (m) / SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS

49 , Round duct diffusers Sound power level, pressure drop and throw distances Horizontal discharge DT=-10K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm p t (Pa) / / / / L 0. (m) > 10 / / / / L WA (db(a)) / / / LD-0/1 L=0 mm p t (Pa) / / / L 0. (m) > 10 / / / L WA (db(a)) LD-0/1 L=10 mm p t (Pa) L 0. (m) > 10 L WA (db(a)) / LD-0/1 L=000 mm p t (Pa) / L 0. (m) / L WA (db(a)) / / / / LD-0/ L=600 mm p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / LD-0/ L=0 mm p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / LD-0/ L=10 mm p t (Pa) / L 0. (m) / L WA (db(a)) / LD-0/ L=000 mm p t (Pa) / L 0. (m) / Definition of symbols L WA (db(a)) Sound power level Dp t (Pa) Total pressure drop L 0. (m) Isothermal throw length of supply air jet, when its speed drops down to 0. /s L 0 (m) L 0 (m) 4

50 , Round duct diffusers Sound power level, pressure drop and throw distances Vertical discharge DT=0K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm p t (Pa) / / / / L 0. (m) 5. > 10 > 10 / / / / L WA (db(a)) / / / LD-0/1 L=0 mm p t (Pa) / / / L 0. (m) > 10 / / / L WA (db(a)) LD-0/1 L=10 mm p t (Pa) L 0. (m) > 10 > 10 > 10 L WA (db(a)) / LD-0/1 L=000 mm p t (Pa) / L 0. (m) / > 10 > 10 L WA (db(a)) / / / / LD-0/ L=600 mm p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / LD-0/ L=0 mm p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / LD-0/ L=10 mm p t (Pa) / L 0. (m) / > 10 L WA (db(a)) / LD-0/ L=000 mm p t (Pa) / L 0. (m) / SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS SUPPLY AIR NOZZLES 5

51 , Round duct diffusers Sound power level, pressure drop and throw distances Vertical discharge DT=+5K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm p t (Pa) / / / / L 0. (m).9 > 10 > 10 L WA (db(a)) / / / LD-0/1 L=0 mm p t (Pa) / / / L 0. (m) > 10 / / / L WA (db(a)) LD-0/1 L=10 mm p t (Pa) L 0. (m) > 10 L WA (db(a)) / LD-0/1 L=000 mm p t (Pa) / L 0. (m) / > 10 L WA (db(a)) / / / / LD-0/ L=600 mm p t (Pa) / / / / L 0. (m). 5.9 > 10 / / / / L WA (db(a)) / / / LD-0/ L=0 mm p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / LD-0/ L=10 mm p t (Pa) / L 0. (m) / > 10 L WA (db(a)) / LD-0/ L=000 mm p t (Pa) / L 0. (m) /

52 , Round duct diffusers Sound power level, pressure drop and throw distances Vertical discharge DT=+10K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm p t (Pa) / / / / L 0. (m).6 6. > 10 / / / / L WA (db(a)) / / / LD-0/1 L=0 mm p t (Pa) / / / L 0. (m) / / / L WA (db(a)) LD-0/1 L=10 mm p t (Pa) L 0. (m) > 10 L WA (db(a)) / LD-0/1 L=000 mm p t (Pa) / L 0. (m) / L WA (db(a)) / / / / LD-0/ L=600 mm p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / LD-0/ L=0 mm p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / LD-0/ L=10 mm p t (Pa) / L 0. (m) / L WA (db(a)) / LD-0/ L=000 mm p t (Pa) / L 0. (m) / SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS SUPPLY AIR NOZZLES 7

53 , Round duct diffusers Sound power level, pressure drop and throw distances Vertical discharge DT=+15K Type Q (l/s) (m³/h) L WA (db(a)) / / / / LD-0/1 L=600 mm LD-0/1 L=0 mm LD-0/1 L=10 mm LD-0/1 L=000 mm LD-0/ L=600 mm LD-0/ L=0 mm LD-0/ L=10 mm LD-0/ L=000 mm p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / p t (Pa) / / / L 0. (m) / / / L WA (db(a)) p t (Pa) L 0. (m) L WA (db(a)) / p t (Pa) / L 0. (m) / L WA (db(a)) / / / / p t (Pa) / / / / L 0. (m) / / / / L WA (db(a)) / / / p t (Pa) / / / L 0. (m) / / / L WA (db(a)) / p t (Pa) / L 0. (m) / L WA (db(a)) / p t (Pa) / L 0. (m) / Definition of symbols L WA (db(a)) Dp t (Pa) L 0. (m) Sound power level Total pressure drop Isothermal throw length of supply air jet, when its speed drops down to 0. m/s L 0 (m) L 0 (m) 8

54 , Round duct diffusers Sound power level and pressure drop Pressure drop by horizontal discharge and % opened volume control damper pt (Pa) LD-0/ L=600mm L WA (db(a)) Q (m /h) pt (Pa) LD-0/ L WA (db(a)) L=600mm Q (m /h) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS Correction factors applicable to LD-0 LD-0/1 LD-0/ Length Volume control damper Volume control damper open closed open closed L=600 X 1 X 1.5 X 1 X 1.6 L=0 X 1 X 1. X 1 X 1.8 L=10 X 1 X 1.4 X 1 X L=000 X 1 X 1.8 X 1 X. SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR FLOW CONTROL UNITS AIR DISPLACEMENT UNITS EXTERNAL ELEMENTS SUPPLY AIR NOZZLES 9

55 , Round duct diffusers Floor Slot Diffusers LD-16N Application LD-16N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installation in the floor. Warm air is supplied in the upwards direction, towards the window. With appropriate dimensions, proper air supply is guaranteed, free of excessive draught or noise (L WA <5 db(a)). AI RAL 9010 CD Description LD-16N slot diffusers are designed in 1,,, 4, 5 and 6 slot versions. They are made of fixed aluminium sections and an aluminium structural frame. The diffusers are available in single piece lengths 00 mm to 000 mm. Painting according to the customer s specification is available on order. Advantages No glass misting Optimal ventilation No heat losses Low pressure drop Prevents the descent of cold air along windows Does not cause heating of air near the windows even in the sunshine Easy installation Versions single slot LD-16N/1 two slots LD-16N/ three slots LD-16N/ four slots LD-16N/4 five slots LD-16N/5 six slots LD-16N/

56 , Round duct diffusers Installation method 1 max 0.m 1 glass LD-16N slot diffuser air supply channel VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS Fast selection diagram L wa < 5 db(a); V ef =,5 m/s; Δp t = 16 Pa L (m) L D -16 N /1 v ef L D -16 N/ L D - 16 N/ L D - 16N/4 L D -16N/5 L D -16N/ Q (m /h) Example The available floor area next to the glass surface is 15 m in length. The calculated supplied air flow rate is 00 m³/h. From the diagram, the type: LD-16N/ L=15m is selected. Q (m³/h) L WA (db(a)) Δp t (Pa) L (m) v ef (m/s) Air flow rate Sound power level Pressure drop Slot diffuser length Effective air velocity SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES Ordering key LD-16N / 1 / L / n Note: Standard colour is RAL Number of longitudinal sections (pieces) Single piece length (L = 00, 00,, 000) 1 Number of slots LD-16N Floor slot diffuser EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 1

57 , Round duct diffusers Panel design slot diffusers LDP-1, LDP-14 Application Panel design slot diffusers are designed for the supply of air in rooms with floor to ceiling heights from.4 m to 4 m. They are suitable for supplying either cold or warm air. St RAL 9010 Description LDP-1 and LDP-14 consists of a diffuser face plate and a plenum box. The diffuser face plate is commonly made of sheet steel and its design can be suited to the customer s requirements. Longitudinal guides, fitting tight to the sheet steel, are inserted in the diffuser face plate. Cylindrical deflectors, made of recycled plastics (ABS-antistatic) are installed in the guides, to allow free adjustment of both air jet discharge direction and flow rate. The number of slots per unit depends on the size of the unit. Diffuser face plate is powder painted in a RAL 9010 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-1 or LD-14 slot diffusers, are white or black as standard. The plenum box is made of galvanised sheet steel. It is fitted with a flow rate control damper, designed for fine air flow rate adjustment. H A 4 1 φ D Type LDP-1 m = 1 mm LDP-14 m = mm 9 5 φ C m 1 Plenum box Volume control damper Inlet spigot 4 Cross member 5 Diffuser face plate 6 Guide 7 Air deflector 8 Spring clamp LDP-1 LDP-14 Size фc Slot length фa фd H No. of slots h No. of slots h

58 , Round duct diffusers Special orders On special order, we can deliver diffuser face plates of any design. The shape and dimensions are specified in agreement with the designer or customer. Technical data Tecnical data are determined upon the definition of the shape, design, number of discharge slots and other factors. Fast flow rate determination (at L WA < 5 db(a)) LPD-1: flow rate per 1 meter length m³/h LPD-14: flow rate per 1 meter length 1 m³/h Ordering key LDP-1/B/K/M/I Size 0 Size (0, 0, 600, 65) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to 105 C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material) I19 Sound and thermal insulation (from - C to 105 C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) AIR DISPLACEMENT UNITS M Volume control damper LDP-1 LDP-14 K Plenum box B Black deflectors W White deflectors Note: Please specify the deflector colour in your order. Versions with insulation on the inside of the plenum box are also available. SUPPLY AIR NOZZLES SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS