Acoustic trickle vent. Unfortunately, there’s no hiding the fact that they can look unsightly. Acoustic trickle vent

 
 Unfortunately, there’s no hiding the fact that they can look unsightlyAcoustic trickle vent  Consult manufacturer for details and insert requirements

New higher equivalent area confirmed by the BRE. 2500mm2 EA. Cowled Super Acoustic Controllable LookRyt® AirCore® (Up to 50 dB Dn,e,w) Controllable air vent for background room ventilation. Installing a background ventilator through a wall that provides the equivalent areas described in Approved Document F, volume 1 can be an. As the name suggests, these are trickle vents with added insulation. The Acoustic Energy Saver Humidity Sensitive Trickle Ventilator (TVES4dB) is perfect for use in built up areas nearby busy roads and motorways. Zehnder Group UK. Complete with a thermal foam seal, a 10mm slot size and sleek rounded external hood it is the perfect slimline surface mounted vent solution. Manufacturers and suppliers of ventilation and euro hardware products; trickle ventilators to window handles, locking and hinge systems to mechanical ventilation products. They are controllable, to give the option of having them open or closed. As UK stockists, Window Ware are proud to stock a wide range of RW Simon trickle vents, including framevents, acoustic vents, TTF slimline, as well as their ever popular vent-a-matic circular window vent. Trimvent® Select Xtra S13 is a surface mounted plastic slot ventilator that fits over a 13mm slot in a window and provides an Equivalent Area (EA) of 2000mm2, 4400mm2 or 5000mm2. Acoustic trickle vents I am in a new build house (4 years old) and I am looking to improve the soundporoofing to the front of the house. Greenwood Acoustic 2500EAW. 70 . Uses no electricity or mechanical power. A range of eight models from 100 to 315mm dia. Trickle vents quietly create a healthy environment for your home and family. Internal hit & miss grille manually adjusted with an easy sliding. The vents have an effective free area, in terms of how much air flows through, of around 4000 sq mm. Learn More . Acoustically damped pipe fitted around unit to reduce external sources of noise such as traffic. £59. Many homeowners, architects and double-glazing companies prefer to avoid trickle vents as they can affect a property’s overall aesthetics, energy efficiency and acoustic performance. Simon Air Management have been manufacturing and supplying ventilation and air management systems to the glazing and construction industries for over 50 years. Acoustic trickle vents now make it possible to obtain planning permission for new developments that are situated near a busy road, train lines or an industrial site that would have been refused. SF Xtra Sound Attenuator (Acoustic) Vent. £7. Yale Trickle Ventilators - Yale UK. Will help to reduce condensation. View details. These pared-down pieces of kit (measuring between 412mm and 250mm) are the smallest acoustic window vents on the market, yet they offer unbeatable noise-reduction (up to 45dB) and impressive. There are two kinds of ventilation: background and rapid. External canopy grille (Glidevale Ultravent Grille, supplied separately) provides weather and 4mm insect ingress protection. Internal baffle reduces light and draughts. sales@titon. Do you need acoustic ventilators for your windows? Check out the Simon Acoustic Range, a comprehensive catalogue of products that offer high performance, durability. 89. com / 01206 713801 Product Product Code (L) Length (W) Width (P) Projection Closed-Open Free Area (mm2) Slot Detail SF Xtra 2500EA Vent only TA5220 425 23 10-24 4207 SF 418 Canopy only TA5005 418 23 27 5114 SF Xtra Sound Attenuator 2500EA Vent 25mm TA5221 464 35 37-51 3470Our elegantly crafted trickle vents for casement windows come in a range of sizes, styles and colour options meaning there is something to suit every form of window. Our trickle ventilator products are available for delivery as. This can cause health issues through humidity, such as dust mites and mould, or even impact on the long-term. With window vents, you can ensure a constant and natural supply of fresh air into your home through dry rooms such as living rooms and bedrooms. Ventilation can be provided through any appropriate means. mechanical ventilation and passive trickle ventilation. Hit & Miss: 271mm L x 95mm H. Our windows include trickle vents to provide ventilation and to comply with the latest. All Glidevale Trickle Ventilators have been tested to meet the building regulations. Helps to prevent mould and mildew. BV, BV - TV. Acoustic Trickle vents. The Simon 19000 Acoustic is a thermally broken glazed-in ventilator that incorporates all the features of the standard Airstrip 19000 and achieves a sound reduction of up to 44dB open. Features a slim line design with two stage opening with the benefits of sound insulation. The 13/16” dimensions are always constant; therefore the body length is always 1-5/8” shorter than the overall length. Yeah, it might be the same mechanism as what they use for mufflers (in which you have a. A trickle vent is a device usually fitted at the top of a window that allows fresh air to circulate naturally through a room, and allows polluted air out. This SlimVent and Canopy set from Yale is a part of our comprehensive range of trickle vents that enables window and door manufacturers to meet the requirements of the latest revisions to Building. Keep your trickle vents open. favorite_border. Are the trickle vents available in various colours? Cover the sides and top and bottom of your air vent with acoustic foam as you go. Bi-Fold Folding Slide . W. 16 years ago. Acoustic performance tests by BRE Acoustics. Aereco develops innovative ventilation solutions for residential and office buildings with a key concept: the modulation of airflow rates according to. PureAir Room 260. A decentralised Mechanical Extract Ventilation (d-MEV) system is a low energy, continuous mechanical extract ventilation system designed to draw. Up to 40 db Dne W. Features Substantial sound reduction up to 50dB Dn,e,w. Over Frame Design: When it is not possible to fit the trickle vent through the. The EAR42W is one of the best performing acoustic window ventilators available in the UK. Excellent acoustic control was a priority, as the site is surrounded by transport routes, including a railway line. Lockable restrictor (160mm or 270mm) Click vent. Acoustic Duct Versions. Typically, standard trickle vent covers offer around 30-35dB noise reduction, whereas an acoustically treated trickle vent cover may offer a 40-45dB reduction when installed perfectly. Single/Multipack. 2 Acoustic Modules. Stuff the Vent With Acoustic Foam. 96, Prolific: to 31/8/23 £663. Product Description. Having recently moved into a new build apartment, the noise through the trickle vents in the bedroom window is driving me mad. 497mm (5000EA) 215mm (5000EA) 173. Our extensive range and comprehensive support will provide you with a solution for any housing project. Ventilation building regulations have recently changed in England and Wales. The rafter air channels will need to be able to be installed between rafters and generally need at least 16 inches. In response to the new. Our Products. Special colours available on request for all trickle vents; Felted gasket for increased performance; When specified correctly complies with Building Regulations; Technical Information Close . Yale SlimVent Trickle Vent Set (White, 4000EA) Brand: SD Hardware. Window vents, also known as trickle vents, are an effective way to improve indoor air quality in dwellings through passive ventilation. Trickle Vents by "Simon" we have these vents available in various colours and sizes. Independently tested by Sound Research Laboratories in accordance with BSEN20140-10:1992, ISO140-10:1991. R. Natural daylight, as well as natural ventilation, are recognised factors in improving the wellbeing of a building’s occupants. Surface mounted and screw fixed to the frame these window vents are great for general replacement where window vents are broken or missing. uk +44 (0)28 9061 6505 GB The trickle vent is constatntly closed due to the noise, will an acoustic vent be a significant improvement on a closed vent or only compared to an open basic vent. One of the best performing acoustic window ventilators available in the UK. The actual minimum performance specification forTrickle Vents. Place an order within 08h 51m 57s And we will send your order today. Available in 3 external cowling colours. TTF Slimline Ventilator. The airvent SM 1200 is a high performance surface mounted window vent that achieves a sound reduction of up to 43 db Dnt Rw in the closed position. View. Construction Industry Professional, Yoga Teacher and Life Enthusiast Report this post Report Report400mm Tan and White Trickle Vents (internal and external fittings) £9. Replacement windows should be fitted with trickle vents regardless of whether the windows being replaced had vents in them or not, if no background ventilation alternative is being installed. This ensures the levels of total background ventilation stipulated in the Building Regulations are met, while the level of noise entering a property remains at a minimum. We offer a next day delivery timeframe, please be aware this is our aim and not a guarantee. Finish (inner and outer). posted. Flush fit | White ABS Plastic | 430mm long x 20mm wide x 10mm deep (4,000 mm 2 free area). GREENWOOD ACOUSTIC 5000EAW. Acoustic window vents are the answer! Our range of high-performing acoustic trickle vents for windows block out noise and help to soundproof, along with allowing fresh air in to create a comfortable, well-ventilated. Greenwood 5000EAW. Ducting & Terminals. It can be locked in the minimum as well as maximum flow position. Location. aircycle 3. The question is usually followed by a silence as the customer thinks about what they already have. In addition, acoustic vents can also help to improve the overall acoustic quality of a room by absorbing excess sound waves. Background - usually provided by trickle vents installed within a window frame ; Purge - either natural (by opening a door or window) or mechanical . Verified 4 months ago . g in bedrooms, or living rooms, require 2 vents). The honeycomb grill is designed to filter out unwanted airborne debris. PAGE 1 OF 3. Your cart will contain total 27 points that can be converted into a voucher of £2. Simon Air Management have been manufacturing and supplying ventilation and air management systems to the glazing and construction industries for over 50 years. The unit has three fixed trickle speeds of 6l/s, 7l/s or 8l/s and two fixed boost speeds of 13l/s. Acoustic Information (31) User Guides (47) Fault Finding (13) Calculators (1) Test Results (36) URL (8) Manuals and Documentation (Obsolete) (35). The ventilator provides outstanding Dn,e,w 42dB (A) for areas with high external noise transmission, those likely in PPG4 categories B, C and D. Cost effective sound attenuating (acoustic) trickle ventilator. In noisier locations, such as near a busy road or an airport, the trickle vent can be designed with additional acoustic options giving even more noise reduction benefits. Trickle vents are not required. In noisier locations, such as near a busy road or an airport, the trickle vent can be designed with additional acoustic options giving even more noise reduction benefits. At the FITSHOW 2013, we launch the first of the “Link Vent” range of patent applied for trickle ventilators. To help you find the right products for your needs, all our ranges are. Glazpart MK2 Link Vents - Singles 236mm 2500EA. We explain what trickle vents are, why you need them, and how to choose products with a. New rules (after 15 June, 2022) In line with the new rules, all windows and doors must be fitted with trickle vents, unless there is an alternative, dedicated ventilation system fitted. 5000mm² Equivalent Area Performance from the smallest vent at 410mm long High levels of background ventilation are required when applying System 1 of the Building Regulations in new dwellings; Intermittent Extract Ventilation and Background vents e. 10 inc. 894 The Crescent, Colchester CO4 9YQ United Kingdom. Acoustic energy saver humidity sensitive ventAquwall HY acoustic trickle vents are designed to provide ventilation and fresh air through the window frame, while keeping windows shut and your home secure. The RW Simon Ltd TTF Slimline window trickle ventilator is a through frame trickle ventilator that is a robust, yet stylish aluminium ventilator. Restrictor with ventilation position. Glidevale Fresh 99H Humidity Sensitive Wall Vent – BIM Object. Available in standard, acoustically attenuated (for noisy install locations) and humidity sensitive. Summary 1. Proposal It has been proposed to redevelop the former Maybloom Club site, Bostall Hill, London, SE2 0RA, toTrickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. Whether you’re looking for a full Trickle Vent, or just the Canopy Covers, we stock a range of products that when combined are sure to produce your optimal ventilation solution. co. Existing homes. Provides an outstanding Dn,e,w; 42dB (A) for areas with high external noise transmission. Interested in fitting an acoustic vent but struggling to find anyone with aany experience of them. Adding an extra pane of glass with our triple glazing will only provide a small increase in sound insulation, if all three panes are of the same thickness. Up to 29 db Dne W. 14. The 300mm dia. Vent-Axia PIV brochure - Edition 1. Acoustic trickle vents now make it possible to obtain planning permission for new developments that are situated near a busy road, train lines or an industrial site that would have been refused. Flush Fit. Overview;. RRP from £15. VAT) Order Quantity. Lockable restrictor (160mm or 270mm) Click vent. co. They are also necessary in Patio doors and French doors, if they are the only apertures in the room. Inc. We also offer the acoustic window trickle vent range in a selection of anodised finishes. Despite the recommendations, it is often a good idea to fit as many vents as possible into rooms such as bathrooms and kitchens which can contain steamy. Enjoy fresh air indoors with window vents. VAT. Glidevale Energy Saver Humidity Sensitive Trickle Ventilator automatically adjusts it flow rate in response to humidity levels in a room. A decentralised Mechanical Extract Ventilation (d-MEV) system is a low energy, continuous mechanical extract ventilation system designed to draw. The SF Xtra is factory-made to standard sizes. Download. What was surprising was the result of testing the ‘acoustic’ slot vent, for which a 35dB reduction was claimed. Acoustic block ventilators are large, aesthetically unattractive and often cannot be accommodated. 50 a set, conform to Building. I spoke to a window company about their acoustic glazing range. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories. BV, BV - TV. 4080mm² measured area 2500mm² Equivalent Area. Where high acoustic performance is required trickle vents should be avoided as they will have a detrimental effect. The RW Simon Ltd TTF Slimline window trickle ventilator is a through frame trickle ventilator that is a robust, yet stylish aluminium ventilator. Glazed-in window vents are activated with a single finger. £395. Your Price Apply / Login. Rytons are the leaders in vents for all applications and their acoustic performance is second to none. ECOSlide uPVC sash windows come equipped with trickle vents as standard to meet Part F of Building Regulations. 8 mm in the Enhanced range. Resources. They are there for a reason taping them up will only cause issues elsewhere. Trickle vents are activated with a single finger and provides passive. WindowMaster motor for Natural Ventilation. Supply Ventilation. EN. WHITE 400mm Trickle vents from just £3. With its built in updraught and various operating modes the TTF Slimline is suitable for all types of windows. g. The ventilator provides outstanding Dn,e,w 42dB (A) for areas with high external noise transmission, those likely in PPG4 categories B, C and D. Ventilation systems. Size: 400mm (L) x 20mm (H) x 22mm (D) Achieves sound reduction of 40dB closed and 33dB open. 02 Please note the Vent Units or the Canopy Units can be fitted. TTF Slimline Ventilator. Air Leakage – 0. Acoustic ratings – see above. Schüco decentralised ventilation systems stand out from. g. Technical Information. Trickle ventilators provide ventilation to the room without the need to open the main window, reducing noise levels as a consequence. Manufactured from PVC. Ex. Features and benefits: Provides. Rytons acoustic trickle vents for walls allows the occupant controllable ventilation with the comfort of reduced noise transfer from outside into the room. Take advantage of the wide range of Brookvent products!The acoustic Trickle Vents can also be powder coated to any standard RAL colour. Slot Size: 2no x 13-17 x 135mm. 2500mm2 EA and 5000mm2 EA versions available. 250-368mm L with air brick fitted. 2500EA. Acoustic performance tests by BRE Acoustics. Acoustic SL (Slimline). Let us know how you want the parts delivered and we can arrange it! New in this edition are rendered CAD images to give a clear view of our products. No projection when closed. 5 year old house has trickle vents on every window, which let in a huge amount of cold air even when closed. Hopefully the first of many more upgrades, and after seeing Thermally Broken suites specified for over 2 years, good to see the requirements finally stick on a…Secondary glazing does not need trickle vents which improves the acoustic performance. Your Price Apply / Login. 5 year old house has trickle vents on every window, which let in a huge amount of cold air even when closed. Vent-Axia Sentinel Apex Brochure - Edition 1. 75 (£14. Summary 1. uk5. Core features include: The SM. The room must achieve an internal noise level of 35 dB(A) over the duration of the measurement period. If you live near a busy road or an airport, trickle vents can be designed with additional acoustic options to give even more noise reduction benefits. RW Simon Ltd have launched a range of acoustic ventilators to assist clients in creating a satisfactory solution for all their acoustic requirements. Equivalent area: 14,427–34,032 mm²/m. BIM object . I discuss sound mazes in more detail in the article linked above, but watch this video for steps on how to build a sound maze. As ventilation specialists, we are also proud to supply. 1000 Pa. V. Google has come up with various options. One or more expansion chambers are provided at turns or directional changes within the tubing which reduce or eliminate noise transmission through the vent. Welcome to the HandleStore range of trickle vents for the replacement of existing, tired, missing or broken slot vents found on double glazed windows. Acoustic performance of 33 Db and an EA rating of 4600, the V4000 is great value and available from stock for next day delivery. 16 years ago. Achieves Building Regulations’ EA requirements. The purpose of trickle ventilators is providing a consistent flow of fresh air. 5. 250-368mm L with air brick fitted. The unit has three fixed trickle speeds of 6l/s, 7l/s or 8l/s and two fixed boost speeds of 13l/s. Happy trickle vent day! As of today, June 15th 2022, the newly revised Building Regulations for England have come into force. Consealed 90⁰ hinges for windows and casement doors. Features & Benefits. RW Simons Ltd PVCu Trickle Vents range is called Framevent and is the latest addition to our extensive range of window ventilators. Trickle vents provide ventilation to any room without needing to open the window, which reduces external noise levels. SilentFiber™ Acoustic Duct Liner designed to be applied to interior surfaces of sheet metal ductwork for air conditioning, heating and cooling systems in residential and commercial. RRP from £2. Trickle vents are not required. The question is usually followed by a silence as the customer thinks about what they already have. R. If your property is near a busy road, railway or airport, trickle vents can be designed with a high-performance acoustic option to reduce noise. If you still think opening a window is the best way. Slimline vent design has clever two stage opening. Surface mounted window vents are specifically designed to operate in conjunction with a routered airflow slot through the frame or sash. One of the best performing acoustic vents available in the UK. This SlimVent & Canopy set from Yale is a part of our comprehensive range of trickle vents that enables window and door manufacturers to meet the requirements of the latest revisions to Building Regulations Approved Document F in England and Wales, and the Scottish Building Regulations October 2011 Standard 3. YS170. Take some 3M spray adhesive and apply it to the flat side of one of the acoustic foam pieces. Enquire now, call 01805 623721Trimvent vents all give optimum airflow. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. Trickle ventilators are typically manually maintained slots integrated into window frames. So if the ventilator is effectively blocking sound in some way then the vent will let a lot less noise in than the window does when opened just a mm or two. Free area (maximum): 26,670 mm²/m. Acoustic Ventilation is used in rooms which require ventilation but still a high level of soundproofing. The Greenwood Acoustic vents provides the perfect solution, delivering an effective level of air replacement while keeping out unwanted noise. This product is equally suitable for domestic and non-domestic applications. All ventilators in the range meet the requirements of Document “F” and Document “E” of the Building Regulations. Acoustic Trickle Ventilators. Quantity. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories and more. 8,400mm² (84cm²) equivalent area. W x H x D: 258 x 240 x 8mm. New building regs for future homes 2025 in new builds will not have them, further more they will be trippled glazed. 79. Greenwood 2500EA/5000EA Slotvent. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. Available in white or brown. It will end up oozing out and coming down the frames/glass. Donald BSc (Hons) AMIOA T: 0330 043 1764 Page 4 of 24 1. if you have trickle vents in these rooms then they should be acoustic, otherwise you are circumventing the expensive windows you have just specified/fitted. FOR USE ON PVCU, TIMBER OR ALUMINIUM WINDOWS. The Freshvent has 2700 mm² equivalent area. DG 1500; DG Standard;. V. Adding secondary glazing means sound must travel through another layer of glass and air space between, helping to diminish its energy and improve sound proofing. Up to 47 db Dne W. Sometimes the best way to achieve the best acoustic performance in new build applications is to upgrade from a traditional ventilation strategy, e. Acoustic STC – open 32dB – closed 43dB. Unique tilting T-bar variable opening. The SM 1000+ is a slim, unobtrusive surface mounted window vent that offers trickle ventilation. The EAQ42W is one of the best performing acoustic window ventilators available in the UK. Well, unless you have things in place to 'block' it, you will probably find that as it expands it won't just stay in the trickle vent. Yeah, it might be the same mechanism as what they use for mufflers (in which you. Lockmaster® 28mm . 63cm². Click here >. Established in 1958, R. VAT. ukdiyboy, Feb 9, 2021 #6. Features and benefits: Provides 5000mm² equivalent area from a single vent; Available in 2 sizes: This vent 5000EA - 412mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) ExternalTrickle ventilators. The acoustic Trickle Vents can also be powder coated to any standard RAL colour. Acoustic ratings – see above. Dimensions. 5 psf / 600Pa. Features and benefits. The offer includes the following colour versions: white, anthracite, grey, chestnut and oak. A hardwood subframe can act as a thermal barrier, as aluminium is a great heat conductor, the wooden subframe prevents cold bridging from the fabric of the building onto the aluminium. 57 Ex. [report] [news] Monday 29th January 2018. Ventilating buildings is about more than just the exchange of air. Then press that piece back to back against another one. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. 39 (0;-2) dB. The best acoustic attenuation reached so far by a trickle vent is the effect of combining our reliable Ventair TRDn controller with a two-stage acoustic attenuator installed in our Ventair Akustik air intake. Horizontal strip, aluminium ventilator for windows with internal adjustable flap for airflow control. Designed to improve natural ventilation in the home, trickle vents have often proved unpopular with homeowners because they can spoil a window’s aesthetic appeal. co. Contact Us. Ideal for both timber and PVCu, the Framevent has been specifically developed for the volume market. Our largest vent, the TVALdB800, is capable of sound reduction up to 42dB Dn,e,w. VAT. Remove the vents,stick masking tape over the holes refit vents. 1,394 posts. Suffix product code with: Suffix product code with: 265 (white), -898 (Desert Sand), -242 (Almond. 37, Misc. Delivery. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. Designed for new builds, the DMEVe 100mm is recognised in SAP PDCB, NHBC and STAS approved. 6300mm². Having recently moved into a new build apartment, the noise through the trickle vents in the bedroom window is driving me mad. The SM ACOUSTIC offers 2500mm2 EA airflow whilst simultaneously providing up to 40 db DneW sound reduction, even in the open position. Single. Developed in 2 sizes the vents performance will be 5000. Verified 3 months ago . Additional tips to help cut noise emissions from your MEV or MVHR systemIn our bedroom (and any room with trickle vents) we can clearly hear the road noise. All. Browse 11 products that are ready to use on your projects. £7. AIRSTRIP “Glazed-In” Ventilators. Share. The new slim-line. The ventilator has been designed with upward air deflection to eliminate replacement air. As one of the market leaders in tile ventilator manufacture in the UK, Glidevale Protect’s range has been collated for over 35 years and includes hundreds of dedicated profiled tile ventilators matching almost. Natural daylight. However, they are intended to be left in the open. Supplied as controllable internal vent, acoustic ducting and external grille. Restrictor with ventilation position. Standard trickle vent. Acoustic Performance Dn,e,w to 42 dB (A) Colour - White. NB: For optimum performance the ventilator should be installed on a flat surface free from defects, and sealant should be used along all edges to achieve the desired acoustic result. 57 Ex. 4000EA. Wasn't sure where to post this ! We moved into a new house in June2010, when it started getting colder we closed the trickle vents on all the windows but still have a draught coming through them. Acoustic laminated glass; Sash Horns. Here’s some useful advice on how to achieve compliance. Where a plurality of expansion chambers are used, each chamber may. MA3051 ACOUSTIC VENTILATOR. A trickle vent above a French door is small and narrow in comparison. Improved Db reduces noise to new levels of performance, especially in the closed position. Damp Weather Shutoff – dual control adjusts. Internal hit & miss grille manually adjusted with an easy sliding. Acoustic trickle vent. Acoustic trickle vent. . 400mm. We also offer the acoustic window trickle vent range in a selection of anodised finishes. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. (closed to trickle), max 40m 3/hr. We are official stockists of Rytons Vents. Home. Range includes: Standard through frame. Function. and two 'acoustic' trickle vents: • - 66 dB day - LAeq,8h 61 dB night LAFmax not normally exceeding - 80 dB more than 10x per night . They’re either fitted to a window frame or sometimes between the glass and the frame. This also allows them to be compliant with the latest building regulation requirements. Generally, to gain maximum performance, the size of the acoustic attenuator should be mirrored on the vent and canopy; and. More information [email protected].