NORDFAB DUCTING CATALOGUE

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1 NORDFAB DUCTING CATALOGUE C l i p p e d D u c t i n g THE WORLD S FASTEST DUCTING & FLANGED DUCTWORK

Nordfab QF Clipped and FL Flanged ducting QF clipped and FL flanged ducting offers a complete range of diameters and accessories for easy-to-fix professional installations.

2 Nordfab QF Clipped and FL Flanged ducting QF clipped and FL flanged ducting offers a complete range of diameters and accessories for easy-to-fix professional installations. Manufactured from galvanised steel, the recently introduced plasma welded range with smoother internal surfaces and greatly enhanced leak resistance offers an unbeatable solution for all general purpose dust extraction duties. STANDARD BEND The Quick-Fit clip features a generously dimensioned sealing gasket held firmly in place by positive over-centre clamping action over the rolled collars at the duct ends to be joined. For added security a locking pin may be inserted. QUICK-FIT CLIP ROLLED EDGE FL flanged ducting is supplied with pre-assembled and drilled loose flanges, for ease of alignment during installation. SLIP DUCT O-RING QUICK-FIT CLIP Nordfab QF and FL ducting form a key part of your dust collection installation. Choose either QF clipped or FL flanged in standard weld-free galvanised form or plasma welded for superior internal surface finish. Nordfab can guide you from design to installation, with first class service and parts availability. QF for fast installation with no special tools, no painting, flexible working SUCTION / MACHINE HOOD CONNECTION Who Uses Quick-Fit Woodworking Furniture Metalworking Concrete Recycling Plastics Textiles Powder, Bulk and Solids Agriculture Paper Chemical Ventilation And many more Easy to assemble installation components Neat slip duct connections to adapt and adjust ducting on site during installation FL offers additional security of bolted flanged connections for more rigorous applications Plasma welded straight ducts for smoother surface and enhanced leak resistance Easy to extend or take apart completely for cleaning, reconfiguring or relocation Full range of accessories and installation components Adapters available to connect to and extend all other duct systems ATEX certified CARZ back pressure flaps for explosion protection All you need from one comprehensive, tried and tested range Stainless steel available 2

3 Sizing Nordfab System Nordfab offers assistance to customers who have never designed a ducting system. We can assist you with determining the correct duct size and configuration for optimal air flow. Please call your local representative for assistance. [] 10 [m/s] 12 [m/s] Using the air volume chart Range of duct air flow volumes [m 3 /h] 15 [m/s] 18 [m/s] 20 [m/s] 22 [m/s] 25 [m/s] 27 [m/s] 29 [m/s] This chart allows you to choose the correct duct size for the air volume that is required. Different materials need to be conveyed at different velocities to prevent the material from falling out of the air stream. For example, wood chips and saw dust flow well between 18 and 22 m/s. Referring to the chart, a 100 duct will convey 622 m3/h at 22 m/s. This indicates that a 100 pick-up on a machine will use 622 m3/h from the filtering system. Or working in reverse, if you know that a machine will require approximately 650 m3/h to remove the waste, then you should design a 100 duct for the application. 31 [m/s] Nordfab QF wraps up your ventilation requirements Consistent: The strength, quality and versatility of Nordfab QF ducting make it suitable for applications far beyond local exhaust ventilation (LEV - dust extraction). Versatile: Clipped ducting in several diameters from 100 to 710; flanged version up to 1000 diameter. Materials typically bright galvanised steel or stainless steel in thicknesses ranging from 0.7 to 2.0, for heavy duty applications. Strong: Independent tests by the ATEX Notified Body FTZU confirm a maximum allowable internal pressure under explosive conditions (Pred) in excess of 0.8bar, making it very suitable for systems handling inflaable or explosive dusty atmospheres, which have explosion protection measures. Leakproof: With plasma welded longitudinal seals, tightly clipped joints incorporating high quality flexible and resealable gaskets, leakage under positive or negative pressure is almost eliminated, making Nordfab QF suitable for ducting applications that must conform to DW/144 class A, B and C for leakage. Clean: All internal surfaces are smooth and free from ledges Accessible: All parts including duct sections, branches, bends and hoods are located by means of quick release clips easily dismantled and re-fitted for inspection and maintenance. The requirements of HVCA Guide TR/19 (Sects 3 & 7) are easily fulfilled by design, making Nordfab QF ideal for kitchen extract systems in accordance with HVCA DW/172 principles of good design. 3

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6 Instructions for installation of slip duct Measure distance to be spanned 1 Mark distance to be spanned less Use O-ring provided and mark for cut 3 Put O-ring on cut duct, slide slip duct over, cut piece of duct 5 Snap clip over O-ring and one end of slip duct 6 Cut the duct 4 Finished connection with the slip duct 7 6 duct

STOCK RANGE Slip duct L = 300 100 20000-100 0.7 0.35 125 20000-125 0.7 0.42 140 20000-140 0.7 0.49 160 20000-160 0.7 0.56 180 20000-180 0.7 0.63 200 20000-200 0.7 0.70 224 20000-224 0.7 0.84 250 20000-250 0.

7 STOCK RANGE Slip duct L = Quick Fit Clip L Seal will be installed and folded over at the factory While clamping down, slowly tuck extra seal underneath the opposing side of clamp Rubber O-ring Slip duct QF clip O-ring

STOCK RANGE Straight duct QF 20915-315 Straight QF duct

08 140 20915-140 0.7 3.64 160 20915-160 0.7 4.

18 224 20915-224 0.7 5.60 250 20915-250 0.7 6.

7 8.96 400 20915-400 0.9 13.6 450 20915-450 0.9 15.

8 STOCK RANGE Straight duct QF Straight QF duct L=1470 Nom

STOCK RANGE *Straight FL duct L=1470 Nom. 560 20115-560 0.9 23.0 630 20115-630 0.9 26.2 710 20115-710 0.9 29.5 800 20115-800 0.9 35.4 900 20115-900 0.

16 20115-900 20112-710 Straight duct flanged and flages 630 20112-630 0.9 37.17 710 20112-710 0.9 41.23 800 20112-800 0.9 48.67 900 20112-900 0.9 53.

25 350 30015-350 387 413 8 4.0 1.40 400 30015-400 438 464 12 4.0 1.55 450 30015-450 488 514 12 4.0 1.75 500 30015-500 538 564 12 4.0 1.95 560 30015-560 600 625 12 4.

9 STOCK RANGE *Straight FL duct L=1470 Nom *This item is made to order *Straight FL duct L= Straight duct flanged and flages *This item is made to order Duct Pitch circle Flange External No. of holes

STOCK RANGE Pressed bends QF 30 2100X-100 30 Pressed bends r r = 1 x x = angle size (3,4,6,9)

7 0.4 160 21003-160 160 35 135 170 0.7 0.5 180 21003-180 180 35 145 185 0.7 0.6 45 45 Pressed bends r L1 L2 H 100 21004-100 100 50 125 165 0.

7 10 60 90 60 Pressed bends r L1 L2 H 100 21006-100 100 95 165 210 0.5 0.

5 160 21006-160 160 105 215 260-275 0.7 0.

10 STOCK RANGE Pressed bends QF X Pressed bends r r = 1 x x = angle size (3,4,6,9) L1 L2 H Pressed bends r L1 L2 H Pressed bends r L1 L2 H Pressed bends r L1 L2 H

STOCK RANGE 2100X-200 30 r = 1.5 x x = angle size (3,4,6,9) 45 Segmented bends QF r 30 Segmented bends L1 L2 H 200 21003-200 300 98 367 417 0.7 1.19 224 21003-224 336 100 374 430 0.7 1.37 250 21003-250 375 102 382 445 0.

7 4.77 560 21003-560 840 135 502 642 0.7 6.08 630 21003-630 945 142 528 686 0.7 6.86 710 21003-710 1065 150 559 736 0.7 7.73 r 45 Segmented bends L1 L2 H 200 21004-200 300 170 411 482 0.7 1.

7 4.22 450 21004-450 675 245 592 751 0.7 5.51 500 21004-500 750 261 629 806 0.7 6.69 560 21004-560 840 277 669 867 0.7 8.48 630 21004-630 945 298 719 942 0.7 9.71 710 21004-710 1065 322 777 1028 0.

11 315 21006-315 472 320 555 691 0.7 4.39 350 21006-350 525 339 587 738 0.7 5.45 400 21006-400 600 365 632 805 0.7 5.34 450 21006-450 675 396 685 880 0.7 7.03 500 21006-500 750 425 737 953 0.7 8.

72 224 21009-224 350 447 559 0.7 3.16 250 21009-250 375 480 605 0.7 4.06 300 21009-300 450 551 701 0.7 5.85 315 21009-315 472 570 728 0.7 6.26 350 21009-350 525 613 788 0.7 7.

11 STOCK RANGE 2100X r = 1.5 x x = angle size (3,4,6,9) 45 Segmented bends QF r 30 Segmented bends L1 L2 H r 45 Segmented bends L1 L2 H r 60 Segmented bends r 90 Segmented bends L1 = L2 H L1 L2 H L1 = L2 11

STOCK RANGE Segmented bends FL 21114-710 Standard radius r = 1.

71 710 21113-710 0.7 16.87 800 21113-800 0.7 22.10 900 21113-900 0.7 25.

00 630 21114-630 0.7 18.05 710 21114-710 0.7 20.16 800 21114-800 0.7 26.

24 60 Segmented bends (FL) 560 21116-560 0.7 17.18 630 21116-630 0.7 20.

56 1000 21116-1000 0.7 43.36 90 Segmented bends (FL) 560 21119-560 0.7 21.

12 STOCK RANGE Segmented bends FL Standard radius r = 1.5 x 30 Segmented bends (FL) Segmented bends (FL) Segmented bends (FL) Segmented bends (FL)

MADE TO ORDER Double branch (FL) 2 must be smaller than or equal to 1 560 QT560FL.xxx 0.9 26.0 630 QT630FL.xxx 0.9 32.0 710 QT710FL.xxx 0.9 43.1 800 QT800FL.xxx 0.9 53.

6 900 QI 2 FL. 1 0.9 34.0 1000 QI 2 FL. 1 0.9 42.0 e.g. QT315 250 300 250 1 2 3 4 L 2 1 Double branch (QF) Cut in branch (QF) 100 QT100.xxx 0.7 1.4 125 QT125.xxx 0.7 1.5 140 QT140.

xxx 0.7 5.6 400 QT400.xxx 0.9 11.3 450 QT450.xxx 0.9 12.8 500 QT500.xxx 0.9 17.3 560 QT560.xxx 0.9 21.0 630 QT630.xxx 0.9 24.0 L 4 = ( 4 / 2 ) +58 L 2 = ( 2 / 2 ) +58 710 QT710.

7 0.9 160 QI 2 160 0.7 0.9 180 QI 2 180 0.7 1.3 200 QI 2 200 0.7 1.6 224 QI 2 224 0.7 1.8 250 QI 2 250 0.7 1.9 300 QI 2 300 0.7 2.2 315 QI 2 315 0.7 2.3 350 QI 2 350 0.7 2.8 400 QI 2 400 0.

13 MADE TO ORDER Double branch (FL) 2 must be smaller than or equal to QT560FL.xxx QT630FL.xxx QT710FL.xxx QT800FL.xxx QT900FL.xxx QT1000FL.xxx Cut in branch (FL) QI 2 FL QI 2 FL QI 2 FL QI 2 FL QI 2 FL QI 2 FL e.g. QT L 2 1 Double branch (QF) Cut in branch (QF) 100 QT100.xxx QT125.xxx QT140.xxx QT160.xxx QT180.xxx QT200.xxx QT224.xxx QT250.xxx QT300.xxx QT315.xxx QT350.xxx QT400.xxx QT450.xxx QT500.xxx QT560.xxx QT630.xxx L 4 = ( 4 / 2 ) +58 L 2 = ( 2 / 2 ) QT710.xxx L 1 = ( 2 x 2 ) must be smaller than or equal to 1 2 or 4 must be smaller than or equal to 3 QI QI QI QI QI QI QI QI QI QI QI QI QI QI QI QI QI QI Double branch QF and FL Cut in branch QF and FL 13

MADE TO ORDER Y branch QF and FL Branch QF and FL 14 Branch (FL) L = 1 + 100 2 must be smaller than or equal to 1 560 QG560FL. 2 3 0.9 32.0 630 QG630FL. 2 3 0.9 41.0 710 QG710FL. 2 3 0.9 47.

9 900 QB900FL 2 2 0.9 1000 QB1000FL 2 2 0.9 L 2 L 1 1 L 58 QG 315 250 300 1 2 3 1 1 Y - Branch (QF) Branch (QF) 100 QG100. 2 3 0.7 1 125 QG125. 2 3 0.7 1.1 140 QG140. 2 3 0.7 1.4 160 QG160. 2 3 0.7 1.7 180 QG180.

1 500 QG500. 2 3 0.9 18.5 560 QG560. 2 3 0.9 22.4 630 QG630. 2 3 0.9 25.6 L 2 = ( 2 / 2 ) +58 710 QG710. 2 3 0.9 28.

14 MADE TO ORDER Y branch QF and FL Branch QF and FL 14 Branch (FL) L = must be smaller than or equal to QG560FL QG630FL QG710FL QG800FL QG900FL QG1000FL Y - Branch (FL) QB560FL QB630FL QB710FL QB800FL QB900FL QB1000FL L 2 L 1 1 L 58 QG Y - Branch (QF) Branch (QF) 100 QG QG QG QG QG QG QG QG QG QG QG QG QG QG QG QG L 2 = ( 2 / 2 ) QG L 1 = ( 2 x 2 ) must be smaller than or equal to 1 2 must be smaller than or equal to 3 QB o QB QB QB QB QB QB QB QB QB QB QB QB QB QB QB QB QB

MADE TO ORDER 1 Suction hood 100 23012.X. 1 0.7 125 23012.X. 1 0.7 140 23012.X. 1 0.7 160 23012.X. 1 0.7 180 23012.X. 1 0.7 200 23012.

X. 1 0.9 500 23012.X. 1 0.9 560 23012.X. 1 0.9 630 23012.X. 1 0.9 710 23012.X. 1 0.9 Transition rectangular to round 100 22035.

250 0.9 300 22035.300 0.9 315 22035.315 0.9 350 22035.350 0.9 400 22035.400 0.9 450 22035.450 0.9 500 22035.500 0.9 560 22035.

of connections (from 2 to 8) and shape (round or rectangular) must be specified A B 23035 500 400 Please specify - The actual

15 MADE TO ORDER 1 Suction hood X X X X X X X X X X X X X X X X X Transition rectangular to round No. of connections No. of connections (from 2 to 8) and shape (round or rectangular) must be specified A B Please specify - The actual A,B and dimentions - The positions of the connection spigot - The type of connection spigot (QF, spiro or raw end) Suction hood Transition rectangular to round 15

MADE TO ORDER Floor sweep QF Reducer QF and FL 1 1 Reducer (FL) 560 QR560FL. 3 0.9 6.9 630 QR630FL. 3 0.9 8.0 710 QR710FL. 3 0.9 12.

4 QR 315 250 1 3 1 1 L = ( 1-3 ) + 50 + (2 x 58) 3 23011-180 Reducer (QF) Floor sweep 125 QR125 3 0.7 0.2 140 QR140 3 0.7 0.2 160 QR160 3 0.

7 1.0 400 QR400 3 0.9 1.8 450 QR450 3 0.9 2.1 500 QR500 3 0.9 2.3 560 QR560 3 0.9 2.5 630 QR630 3 0.9 2.9 710 QR710 3 0.9 3.

16 MADE TO ORDER Floor sweep QF Reducer QF and FL 1 1 Reducer (FL) 560 QR560FL QR630FL QR710FL QR800FL QR900FL QR1000FL QR L = ( 1-3 ) (2 x 58) Reducer (QF) Floor sweep 125 QR QR QR QR QR QR QR QR QR QR QR QR QR QR QR QR L C L = 450 A = 150 B = 300 C = 75 B A 16

MADE TO ORDER End cap with bird mesh (QF) 100 22022 0.7 0.13 125 22022 0.7 0.18 140 22022 0.7 0.22 160 22022 0.7 0.26 180 22022 0.

9 2.12 Wire mesh 22022-315 End cap with bird mesh QF 450 22022 0.9 2.63 500 22022 0.9 3.20 560 22022 0.9 3.86 630 22022 0.9 4.

7 0.35 200 22012 0.7 0.40 224 22012 0.7 0.49 250 22012 0.7 0.62 300 22012 0.7 0.88 315 22012 0.7 1.15 350 22012 0.7 1.60 400 22012 0.

17 MADE TO ORDER End cap with bird mesh (QF) Wire mesh End cap with bird mesh QF L = 50 End cap (QF) End cap L = 50 End cap QF 17

18 MADE TO ORDER Smooth adapter QF Smooth adapter (QF) Machine adapter (QF) Machine adapter QF Step edge adapter (QF) Hose adapter (QF)

19 MADE TO ORDER 1 1 Boot shoe (QF) Cut in boot shoe (QF) L = 1 x L1 = 1 x x The boot cut is always placed in the centre 100 TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS TBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS CBS TSB CBS Cut in boot shoe (FL) CBS.560FL CBS.630FL CBS.710FL CBS.800FL CBS.900FL CSB.1000FL Boot shoe (FL) 45 L TBS.560FL TBS.630FL TBS.710FL TBS.800FL TBS.900FL TSB.1000FL L1 Boot shoe QF and FL Cut in boot shoe QF and FL The boot cut is always placed in the centre 19

30 30 A B MADE TO ORDER Low velocity discharge cowl QF and FL D t d Low velocity discharge cowl (QF) D A B C (RHS) 100 140 0.7 400 150 20x20 125 180 0.7 500 150 25x25 140 180 0.

20 30 30 A B MADE TO ORDER Low velocity discharge cowl QF and FL D t d Low velocity discharge cowl (QF) D A B C (RHS) x x x x x x x x x x x x30 d t d Low velocity discharge cowl (FL) D A B C (RHS) x X X X X X50 Custom manifold Custom Manifold Please call Dantherm Filtration for specification 20

MADE TO ORDER Back pressure flap type CARZ L (QF) (FL) B L

FTZU 02ATEX 0271 and FTZU 04ATEX 0090 The CARZ back pressure

damaging effects of an explosion in a vessel such as a dust

It is robustly constructed and quick acting and certified as

Suitable for St1 dust only. B 160 488 260 13.0 488 260 14.

0 250 578 350 20.0 578 350 21.0 315 643 415 27.0 643 415 29.

0 450 880 550 45.0 778 550 48.0 500 930 600 49.0 830 600 52.

0 1138 730 75.0 710 1218 810 68.0 1218 810 83.

0 Explosion without CARZ Explosion with CARZ After explosion

21 MADE TO ORDER Back pressure flap type CARZ L (QF) (FL) B L ATEX Protection system Certified no. FTZU 02ATEX 0271 and FTZU 04ATEX 0090 The CARZ back pressure flap (or non-return damper) is designed to prevent the damaging effects of an explosion in a vessel such as a dust collector from travelling along a duct. It is robustly constructed and quick acting and certified as a protective system in accordance with ATEX Directive 94/9/EC. Suitable for St1 dust only. B Explosion without CARZ Explosion with CARZ After explosion Back pressure flap CARZ QF and FL Dampers 500 & below = 2m straight duct Dampers 560 & above = 5m straight duct AIRFLOW DIRECTION EXPLOSION DIRECTION 21

MADE TO ORDER Manual diverter valve QF 23500 315 250 250 1 2 3 Manual diverter valve (QF) L1 L2 b 100 23500 401 64 88 13.6 125 23500 428 64 106 17.1 140 23500 453 64 124 19.5 160 23500 478 64 142 23.

2 500 23500 1122 169 442 142.2 Flanged version available 23500 XXX Automatic diverter valve QF 23600 315 250 250 1 2 3 Automatic diverter valve (QF) L1 L2 b 100 23600 401 64 88 19.

22 MADE TO ORDER Manual diverter valve QF Manual diverter valve (QF) L1 L2 b Flanged version available XXX Automatic diverter valve QF Automatic diverter valve (QF) L1 L2 b Flanged version available 23600XXX 22

ACCESSORIES 23041-315 Silencer (QF) 100 125 140 160 180 200 224 250 300 315 350 400 450 500 23041 23041 23041 23041 23041 23041 23041 23041 23041 23041

1 7 14 30 50 50 37 21 140 1 5 12 27 50 39 24 14 160 1 5 12 27 50 39 24 14 180 2 4 11 21 37 28 16 10 200 2 4 11 21 37 28 16 10 224 1 3 9 19 38 19 11 9 250

23 ACCESSORIES Silencer (QF) Silencer QF = 990 Sound attenuation in db at frequency bands Hz

ACCESSORIES Flexible polyurethane hose and clamp 8604003-315 Flexible polyurethane hose gr/mtr 38 8604003038 0.5 166 45 8604003045 0.5 200 51 8604003051 0.55 260 63 8604003063 0.

7 1100 160 8604003160 0.7 1160 178 8604003178 0.7 1300 203 8604003203 0.7 1400 229 8604003229 0.7 1580 254 8604003254 0.8 1880 305 8604003305 0.8 2250 315 8604003315 0.

24 ACCESSORIES Flexible polyurethane hose and clamp Flexible polyurethane hose gr/mtr Flexible hose clamp size* * ducting size - Nominal bore - buying unit is 1 meter 24

ACCESSORIES ID OD Metalflex hose Bend Radius /m Standard Length 20 24 100 0.35 10 40 45 155 0.69 10 60 66 215 1.

32 10 160 169 490 3.54 10 180 189 545 3.97 10 200 211 560 5.37 5 250 261 700 6.

+120 C Glass Fibre Seal - temperature range up to approx, +400 C Metalflex hose Manual energy saving damper

6 140 23075 412 248 190 125 102 1.8 160 23075 462 287 220 125 117 2.4 180 23075 501 298 240 125 127 2.

25 ACCESSORIES ID OD Metalflex hose Bend Radius /m Standard Length Can be delivered with: Standard Seal - temperature range up to approx C Glass Fibre Seal - temperature range up to approx, +400 C Metalflex hose Manual energy saving damper (QF) A max B C D E Manual energy saving damper QF 25

ACCESSORIES Automatic energy saving damper QF and FL 3000-315 Automatic energy saving damper (FL) A B C D 1 pc.

4 Automatic energy saving damper (QF) A B C D 100 23073 405 160 125 130 4.4 125 23073 445 190 125 152 5.

2 200 23073 650 260 125 210 8.4 250 23073 840 441 300 360 19.4 315 23073 970 506 300 392 24.

Pneumatic cylinders 315 23373 970 506 300 392 24.6 350 23373 1040 541 300 410 28.1 400 23373 1140 591 300 453 34.

26 ACCESSORIES Automatic energy saving damper QF and FL Automatic energy saving damper (FL) A B C D 1 pc. Pneumatic cylinder 2 pcs. Pneumatic cylinders Automatic energy saving damper (QF) A B C D Standard supply is 220V 240V supply available ( 23074XXX) 2 pcs. Pneumatic cylinders Pipe bracing Installation parts Plain channel 41x Channel spring nut long type m Framework bracket MBP M10 beam clamp FL

ACCESSORIES Split strap I 1 Bolts 100 30940 3 25 10 8x35 125 30940 3 25 10 8x35 140 30940 3 25 10 8x35 160 30940 3 25 10 8x35 180 30940 2 25 10 8x35 200 30940 3 25 10 8x35 224 30940 4 35 10 8x35 250

40 12 10x40 710 30940 4 40 12 10x40 Gripple hanger 30954. 30955. t l 30940-315 001 002 003 004 005 001 002 003 004 005 Load [} 10-45 45-90 Wire length 1 2 3 4 5 1 2 3 4 5 0.04 0.06 0.07 0.09 0.10 0.

27 ACCESSORIES Split strap I 1 Bolts x x x x x x x x x x x x x x x x x40 Gripple hanger t l Load [} Wire length Gripple hanger Load [} L 10 Split strap - heavy duty I Bolts x x x x x x40 Split strap Gripple hanger Installation parts Wire length

28 C l i p p e d D u c t i n g THE WORLD S FASTEST DUCTING & FLANGED DUCTWORK Nordfab Limewood Approach Seacroft, Leeds LS14 1 NG T: F: sales@nordfabducting.co.uk Nordfab Catalogue v4 11/2010 Division of Dantherm Filtration Ltd.

THE WORLD S FASTEST DUCTING

NORDFAB DUCTING CATALOGUE Quick-Fit C l i p p e d D u c t i n g THE WORLD S FASTEST DUCTING & FLANGED DUCTWORK Nordfab QF Clipped and FL Flanged ducting QF clipped and FL flanged ducting offers a complete