Acoustic Shield Natural Ventilation Acoustic Roof Vents Compact Design BB101 & 93 Standard / Twin Flow / Mixed Mode natural ventilation roof vents can be finished in any colour to compliment the architectural appearance of the building while meeting Part L2 & BB93 & 101. The integral Acoustic Shield sound reduction system allows this unit to be used in close proximity to external noise sources including road, rail and airports. Available in 3 sizes with various configurations the Phoenix range can be integrated with most roof mounted commercial acoustic natural ventilation applications. Standard Specification: Acoustic Natural Ventilation Roof Vents include sound insulation and Acoustic Shield technology to reduce rain drumming and increase sound absorption using a specific design configuration of high density non hygroscopic HFC & CFC free acoustic foam. Main body of unit made in galvanised sheet steel powdered coated in Goose Wing Grey 00A05 as standard (Any RAL colour can be specified) with weather proofed overlapping slopes to prevent water pooling on roof vent. Integral bird mesh (optional additional stainless steel insect screen) with internal wind driven rain and snow barrier. 24V actuators factory fitted to integral insulated tight seal dampers. Where boost fan fitted Specific Fan Power S.F.P. = 0.25 W/l/s. Wind Assist Warm stale air exhausts via Phoenix roof vents Cool fresh air enters via Natural wall vent/window
Acoustic Roof Vents 75 / / Dimensions & Weight Cowl Dimensions A (mm) 485 485 485 485 B (mm) 1050 1300 1300 1800 B A Damper Section Dimensions C C (mm) 1040 1290 1290 1790 D (mm) 300 300 550 300 E (mm) 750 0 0 0 F D F(mm) E Curb / Up Stand Dimensions (Required to be built by builder) L J Timber Frame J (mm) 770 1020 1020 1520 K (mm) 970 1230 1230 1730 L (mm) Minimum K Total Weight kg 130 165 210 265 We reserve the right to make changes to dimensions, details & specifications without notice. E.&O.E.
Acoustic Roof Vents 75 / / Types S / TF / Bespoke sizes available to suit specific free area or airflow Standard (S) Roof Vent suitable for acoustically treated exhaust OR supply air. Available in three standard sizes : 75//. Twin Flow (TF) Roof Vent suitable for acoustically treated exhaust AND supply air. Available in three standard sizes : 75//. Mixed Mode () Roof Vent suitable for acoustically treated exhaust with mechanical boost available from built in fan pre wired to electrical isolator. Available in one standard size : Fan boost 800 l/s Single phase (three phase option) Starting current 3 amp Running Current 1 amp Specific Fan Power S.F.P. = 0.25 W / l / s
Acoustic Roof Vents 75 / / Airflow & Acoustic Performance Room Phoenix Airflow Rates (l/s) @ 3 m Stack Height (Still Air) Ambient 75 S S* S 75 TF TF TF 21 1 507 900 2025 253 450 1024 21 11 258 462 1040 129 231 520 21 22 83 155 349 41 77 174 22 27 180 325 731 90 162 365 20 30 252 455 1024 126 227 512 24 30 195 352 792 97 176 396 * S available as model with mechanical extract rate of <800 l/s on boost Room Phoenix Airflow Rates (l/s) @ 6 m Stack Height (Still Air) Ambient 75 S S* S 75 TF TF TF 21 1 715 1266 2860 357 633 1430 21 11 363 650 1472 181 325 736 21 22 115 214 489 57 107 244 22 27 252 455 1032 126 227 516 21 30 358 639 1447 179 319 723 24 30 275 494 1121 137 247 560 * S available as model with mechanical extract rate of <800 l/s on boost Calculations based on stack effect only. Airflow in RED indicates exhaust other airflow indicate reverse flow. Wind assistance can increase airflow considerably. Actual results may vary due to building type and wind deflection. Model Overall level difference Airbourne Sound Insulation (weighted element normilised level difference Dnew db) db Hz 63 125 250 500 1k 2k 4k 8k 75 32 20 22 20 28 39 44 47 53 29 14 19 19 25 35 39 42 47 159 27 11 17 18 23 32 35 38 42 We reserve the right to make changes to dimensions, details & specifications without notice. E.&O.E.
Acoustic Roof Vents Ventilation Diagrams Single Sided Ventilation. Depth of room should not exceed height x 2.5 Worst case summer ventilation opening area is approximately 5% of floor area Rules of thumb for natural ventilation. (BB101 Concept Design) Height to depth ratios Cross Flow Ventilation. Depth of room should not exceed height x 5 Worst case summer ventilation opening area is approx. 2% of floor area Phoenix Acoustic Roof Vents are recommended to be mounted above height of any obstructions to utilise natural ventilation wind assistance Standard (S) Roof Vent Atrium Ventilation
Acoustic Roof Vents Ventilation Diagrams Examples Shown Twin Flow (TF) Roof Vent Single storey Building Standard (S) Roof Vent Classrooms 2 storey building with ground and 1st floor classrooms using communal ducting Mixed Mode () Roof Vent Sports Hall using mixed mode roof vent and ceiling grille