Developed in 2 sizes the vents performance will be 5000. Titon says it has maintained its position as the industry leader through constant research and product development, ensuring the company is still. Invisivent® EVO AK is an acoustic version of the well-known Invisivent® EVO, a discrete, self-regulating overframe ventilator. For effective ventilation, our Rose Collection sash windows are available with trickle vents fitted to the top of the sash. Acoustic Window Vent. Triton brand aluminium trickle vents give you a small amount of ventilation via the window frame or a door frame as controllable or permanent version to reduce condensation in the room and freshen the air with natural ventilation. 2500mm2 EA. Acoustic performance data / octave band 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz Wall, R 41 46 52 58 64 Window, R 23 22 30 36 37 Trickle vent, D n,e 36 34 31 34 38 Table 1: Geometry and acoustic performance data for example calculations When carrying out the calculation, it is suggested that the source noise octave band levels are first Internal and external grilles U. The Freshvent has 2700 mm² equivalent area. Suitable for replacing vents in windows. Complete with a thermal foam seal, a 10mm slot size and sleek rounded external hood it is the perfect slimline surface mounted vent solution. Other finishes available depending on quantity. External canopy grille (Glidevale Ultravent Grille, supplied separately) provides weather and 4mm insect ingress protection. The SF Xtra is factory-made to standard sizes. Note: this will consist of 4 x 300mm section with 2 centre joining pieces. Find and specify trickle vents from top manufacturers with NBS Source. FOR USE ON PVCU, TIMBER OR ALUMINIUM WINDOWS. 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. Yeah, it might be the same mechanism as what they use for mufflers (in which you. Air Brick: Terracotta, buff/sand, white, grey, blue/black, black, brown. This is particularly important in areas where this is more likely to happen, including. Features a slim line design with two stage opening with the benefits of sound insulation. Quantity. The Trickle Vent brings you the Sonovent Acoustic Solution which was developed to meet the two aspects of living comfort: Physical Comfort – fresh and healthy air without draught; Acoustic Comfort – up to 56 dB noise reduction; There are also four types (S/M/L/XL) with four possible air gasps (10,15,20 or 25 mm). The SF Xtra Sound Attenuator ventilator is part of Titon’s SF Xtra range – and is already being widely specified throughout the UK by housebuilders and developers. The RW Simon Ltd Framevent HF (hi-flow) achieves 4,191mm2 EA on a length of only 415mm & the HF + (hi-flow +) achieves 5205mm2 EA on a length of 525mm. W. Damp Weather Shutoff – dual control adjusts. The available models differ in acoustic insulation levels (35, 38, 40 and 42 dB). Acoustic FV (Framevent) Supplied with a PVCu internal flap unit and aluminium external canopy. Your Price Apply / Login. Visit our website now. 89. Our trickle ventilator products are available for delivery as. Vent-Axia PIV brochure - Edition 1. 180⁰ hinge. Ventilation in windows and doors must extract excess water vapour, air pollutants and condensation. A trickle vent above a French door is small and narrow in comparison. Range includes: Standard through frame. UK Manufacturer of home mechanical ventilation systems and hardware for windows and doors, including handles, hinges, trickle vents and extract fans. 55,000mm² equivalent area and space on the window profiles can sometimes be an issue. 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. Meets World Health Organisation recommended reduction of 33dB. Units comprise of an aluminium outer frame joined to a seasoned hardwood timber surround. It will end up oozing out and coming down the frames/glass. blackthornjohn • 6 mo. Trimvent® Select Xtra S13 FOR USE ON PVCU, TIMBER OR. 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. Our windows include trickle vents to provide ventilation and to comply with the latest. The acoustic trickle vent achieves a sound reduction value without compromising internal ventilation. of equivalent area ventilation and acoustic noise reduction. All buildings have to be ventilated in order to maintain the health and well being of everyone using them. Trickle ventilation system. Acoustic laminated glass; Sash Horns. Link-Vent 5000. stabilised UPVc. Buy Now. 5mm (5000EA) 438mm (5000EA) Illustrations show 2500EA version SF Xtra Sound Attenuator Vent Fixing and Operating Instructions BM504 Iss. In addition to its other benefits, mechanical ventilation with heat recovery (MVHR) systems are sometimes specified by planners when homes are built in noisy locations (flight paths, motorways, etc. With its built in updraught and various operating modes the TTF Slimline is suitable for all types of windows. 16 ex. Additional tips to help cut noise emissions from your MEV or MVHR systemTrickle vents allow for a small amount of ventilation even when the window or door is closed. There are two width variants, one for use over a 13mm slot, the other for a 16mm slot. Internal hit & miss grille manually adjusted with an easy sliding. Overview;. Ex. £11. This is due to sound reduction levels being measured differently for trickle ventilators when compared to windows. They’re either fitted to a window frame or sometimes between the glass and the frame. 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. Window Ventilation;Configurations and results. W. If you still think opening a window is the best way. The latest addition to the Simon acoustic range. 595mm trickle vent available in white only. Our window vents are subtly integrated into your façade — and their acoustic damping comes as a bonus. SM Ultima 5000 mm2 EA. Our 3. Unique tilting T-bar variable opening. However, the changes will not apply in relation to building work where a building. Provides an outstanding Dn,e,w; 42dB (A) for areas with high external noise transmission. As acoustic experts, we do not recommend trickle vents. 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. Zehnder ComfoAir Range. The ‘p’ (projection) dimension of each can vary depending on if it is open or closed. We also offer the acoustic window trickle vent range in a selection of anodised finishes. Product Description. Across our Rose Collection, we offer expertly designed, beautifully authentic sash horns. Compare that to our old trickle vent that was 23mm, that’s just over 90% thinner. The trickle vent operates automatically. £7. Lockmaster 21 . Trickle Vents; Titon SF Xtra 13 Vent 465 x 23mm - White; Zoom. Equivalent area: 14,427–34,032 mm²/m. Donald BSc (Hons) AMIOA T: 0330 043 1764 Page 4 of 24 1. Available Colors: The overall vent length. They are controllable, to give the option of having them open or closed. The 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. The vents have an effective free area, in terms of how much air flows through, of around 4000 sq mm. The EAQ42W is one of the best performing acoustic window ventilators available in the UK. Filter and condensation protection The main performance concerns of Trickle Vents are the ventilation rate, thermal insulation, acoustic resistance, water tightness, and air permeability. An acoustic version is also available, developed to satisfy the ever increasing demands for noise reduction whilst providing the desired ventilation levels. If you had a window with trickle vents, and you are replacing it, you need to replace like for like. As ventilation specialists, we are also proud to supply. 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. Five intermediate settings. Enables secure, weather resistant ventilation with exclusion of insects. Continuous Ventilation offers an all round low energy, low noise solution for tenants - and it protects the building effectively. Price: £145. View. Indoor house ventilation. 6 cfm @ 1. Trickle vents provide ventilation to any room without needing to open the window, which reduces external noise levels. It provides automatic ventilation and sound insulation for use near noise sources. Rytons Acoustic Vents. Consealed 90⁰ hinges for windows and casement doors. Click here >. All ventilators in the range meet the requirements of Document “F” and Document “E” of the Building Regulations. It sits proud of the face of the frame by about 1mm (1. 5 psf / 600Pa. Made of aluminium with ABS end caps. Acoustic SL (Slimline) also available. When using a long vent this helps considerably! FeaturesTrickle Vents Framevent Hi-Flow (Anthracite Grey - 415mm) An Anthracite Grey trickle vent designed to help comply with Approved Doc F 2021, whilst maintaining the aesthetic of the Framevent range | 415mm Length x 28mm wide. 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. Features a slim line design with two stage opening with the benefits of sound insulation. Airflow, acoustic properties and test standards. View. A trickle vent is also included. Ex. 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. Acoustic trickle vent. Product Description. 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. Free area (maximum): 26,670 mm²/m. Glidevale ALDB Acoustic Trickle Ventilator 8000mm. CLOSED. One of the best performing acoustic vents available in the UK. The RW Simon Ltd TTF Slimline window trickle ventilator is a through frame trickle ventilator that is a robust, yet stylish aluminium ventilator. Supplied as controllable internal vent, acoustic ducting and external grille. People feel the draught and close the vent or think the room loses its heat. Glazed-in window vents are activated with a single finger. Size: 400mm (L) x 20mm (H) x 22mm (D) Achieves sound reduction of 40dB closed and 33dB open. Nineteen different Trickle Vents are reviewed from some of the performance aspects in this paper. Comes complete with Freshvent 100 db and Freshvent 100 Thermo db versions. V. Window Vents. AIRSTRIP “Glazed-In” Ventilators. The first [22], specifically addressing trickle vents, surveyed 116 sources and mentioned three experimental studies (two schools, one office). Restrictor with ventilation position. The SM 1200+ combines all the great benefits of the SM 1200 with a rod control operation that complies with Part F & Part N (Building Regulations:England & Wales) ensuring control access and ease of operation for the end user. £5. Glidevale Energy Saver Humidity Sensitive Trickle Ventilator automatically adjusts it flow rate in response to humidity levels in a room. Keep your trickle vents open. Acoustic performance tests by BRE Acoustics. Features Substantial sound reduction up to 50dB Dn,e,w. Since 1936, Vent-Axia has been manufacturing a large range of efficient ventilation products helping improve indoor air quality in homes & commercial buildings. The room must achieve an internal noise level of 35 dB(A) over the duration of the measurement period. Available in white and supplied with D Vent for inner vent installation. Colour Name: White. Ventilation systems. 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. They're easy to install, cost effective, unobtrusive and easily operated by the occupant. RW Simon FV Acoustic Vent 400mm 2500EA . Trickle ventilators provide ventilation to the room without the need to open the main window, reducing noise levels as a consequence. 57 Ex. Resources. . Another advantage of Titon’s metal trickle vents is that they are designed to fit over the same slot detail (13mm or 16mm slot), making an upgrade a simple swap. co. Quantity. Acoustic Vents; Glazed in Vents. ago. different acoustic specifications Ò Fits over a Trimvent® Select, Trimvent® 4000 Hi Lift or Trimvent® Select Xtra slot sizeAdjustable flap aluminium ventilator with acoustic attenuation, for glazing-in to windows, overframe or wall mounting. Installing a background ventilator through a wall that provides the equivalent areas described in Approved Document F, volume 1 can be an. Can be installed in internal wall constructions of between 100mm and 150mm. Automated control of differential pressure provides your house with a proper volume of air and, in addition, considerably reduces thermal. YS170. The unit has three fixed trickle speeds of 6l/s, 7l/s or 8l/s and two fixed boost speeds of 13l/s. Supply Ventilation. Now imagine a larger size installation that may require 20 of them. There is so. We also offer the acoustic window trickle vent range in a selection of anodised finishes. Many types of vent offer 2500mm² of air space each, so typically smaller windows in small rooms require 1 vent and larger windows (e. Not Suitable for Use with Gas Appliances. Highest performing acoustic background ventilator. Our 2500EA and the 5000EA equivalent area vents are the smallest acoustic window vents on the market and achieve the best acoustic performance for window ventilators in the UK - up to 45dB (A) It is a simple and adaptable solution for windows in residential dwellings that have external noise issues or planning restrictions. The Acoustic Purge Fan is specially treated with acoustic foam to reduce breakout and induct noise, ensuring end-user comfort during operation. Restrictor with ventilation position. That’s an extra £300 for ‘flimsy, unsightly’ trickle vents. You’ll also find clear plastic window ventilators that fit directly into the glass. Rytons Super Acoustic Controllable LookRyt AirCore is a simple and efficient answer to background ventilation. 1. The problem I'm having is I can hear everything outside, from neighbours talking to cars passing. The new slim-line. VAT. Our 3. For example, if a window with a sound reduction of 35dB is used in conjunction with a background ventilator also giving a reduction of 35dB, the overall decrease will be somewhat less than 35dB. Acoustic block ventilators are large, aesthetically unattractive and often cannot be accommodated. There are two kinds of ventilation: background and rapid. The range was developed to meet increased regulation requirements for sound reduction, and the increased noise exposure resulting from the. Share. The joint piece has an extra secure fixing it in to stop the vent from dipping on the middle over time. Learn More . Yale Lockmaster KeyTurn . The question is usually followed by a silence as the customer thinks about what they already have. 24 assumes a performance of D n,e,w +C tr =41dB). The actual minimum performance specification forTrickle Vents. At the FITSHOW 2013, we launch the first of the “Link Vent” range of patent applied for trickle ventilators. Trickle vents provide ventilation to any room without needing to open the window, which reduces external noise levels. D n,e,w (C;Ctr) – Open position. 4 mm in the Classic range. co. Special sizes available. Lockmaster. About Window Ventilation Our full range of high performance window ventilation includes AIRSTRIP “Glazed-In” Ventilators, Through Frame Trickle Ventilators, Acoustic Trickle Ventilators and Vent-A-Matic provide options. The XS13 is a direct replacement for the S13 range, using the same slot measurements but offering a much greater. Density planning and brownfield development means new dwellings located close to busy roads . Available in standard, acoustically attenuated (for noisy install locations) and humidity sensitive (which open in response to high humidity events), the range is designed to meet even the toughest window trickle ventilation requirements. Provides an outstanding Dn,e,w;42dB. 96, Prolific: to 31/8/23 £663. The importance of indoor air quality is becoming increasingly recognised as buildings are built to be more airtight and more energy efficient. Chrome plating. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. VAT. stabilised. RW Simon Ltd have launched a range of acoustic ventilators to assist clients in creating a satisfactory solution for all their acoustic requirements. 04 psf (Vent and Canopy only) Water Resistance – in excess of 12. Fixing holes in the frame and cover caps. TV90 TV250 Internal Trickle Ventilator: TA660GT:. The offer includes the following colour versions: white, anthracite, grey, chestnut and oak. Hit & Miss: 271mm L x 95mm H. They deliver a constant airflow without having to actually open the. g in bedrooms, or living rooms, require 2 vents). It also features 3 different airflow modes and an insect grille to keep unwanted guests out whilst letting fresh air in, as well as a 5 year manufacturer’s guarantee. Internal baffle reduces light and draughts. Surface mounted noise reducing acoustic trickle vent. Hit & Miss: 271mm L x 95mm H. 1. We had the double glazing firm come out that fitted the windows for something else so I. 18Trickle vents help to deliver natural ventilation in buildings. 70 . Mantis 3. Glazed-in window vents are specifically designed to fit along the top of the sealed glass unit, between it and the frame, by reducing the glass height. DG 1500; DG Standard;. Product Description. Over Frame Design: When it is not possible to fit the trickle vent through the. They told me that as my windows would have trickle vents, the acoustic glazing would not be beneficial for noise reduction. The room must achieve an internal noise level of 35 dB(A) over the duration of the measurement period. acoustic result. Platinum 3 Star Euro Profile Cylinder. Trickle facility to allow air ingress even when closed. Noise assessments results will require acoustic dB reduction in noise transfer through openings in the facade of the dwelling from ventilation. We have a range of products, from basic slot vents, which could perform satisfactorily in certain situations (all of our main ranges have been tested acoustically), through dedicated acoustic trickle vents, to mechanical products and ducting with much higher acoustic properties. WHITE 400mm Trickle vents from just £3. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories. Insect, rodent and ember screensCover the sides and top and bottom of your air vent with acoustic foam as you go. THIS AREA IS CURRENTLY BEING UPDATED – PLEASE FEEL FREE TO DOWNLOAD BROCHURE FOR FULL INFORMATION>. Flush Fit. 125 months. Special colours available on request for all trickle vents; Felted gasket for increased performance; When specified correctly complies with Building Regulations; Technical Information Close . Restrictor with ventilation position. It can be fitted with an XC13 canopy or GS22 grille. The EA Series achieves the best acoustic performance for window ventilators in the UK – up to 45dB (A). Choice of finish. It can be fitted with an XC13 canopy or GS22 grille. Smallest acoustic window vents on the market. 18. 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. Lockable restrictor (160mm or 270mm) Click vent. The vent has one of the highest decibel ratings on the market for a non-acoustic vent. 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. Addition of a wet room to an existing building:. 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. The new 2500EA and 5000EA acoustic window ventilators from Greenwood Airvac make ‘sound’ new additions to the Window Ware range. £7. This includes windows and doors in newly built homes, windows and doors in newly built extensions, as well as all replacement windows and doors, regardless of. The SM ACOUSTIC offers 2500mm2 EA airflow whilst simultaneously providing up to 40 db DneW sound reduction, even in the open position. com TV Select S13 & TV Select Xtra XS13/XS16/XR16 Plastic slot ventilators Ò Suitable for PVCu, timber or aluminium. From manufacturing the first dMEV classified product in the UK in 2007 to our latest release aligned to the 2021 UK Building Regulations, our approach has always been set on delivering a low-energy performance product which. 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. TAL4H&M- '9x3' Acoustic AirLiner® Set with Hit & Miss Ventilator (Up to 39dB Dn,e,w) Controllable air vent for background room ventilation. £7. What was surprising was the result of testing the ‘acoustic’ slot vent, for which a 35dB reduction was claimed. . 14. Humidity control to regulate supply of fresh air effectively throughout the day in response to changing indoor humidity levels. Products. They are also necessary in Patio doors and French doors, if they are the only apertures in the room. Lockmaster AutoEngage. Thanks to its unique soundproofing capabilities, secondary glazing can reduce the noise pollution caused by various sources. ventilation (Glidevale acoustic low profile vent *TVALdB450/800) to achieve up to *40/42dB Dn,e,w sound reduction. They offer a more durable and reliable solution for house builders and fabricators, with better weathering and acoustic properties, a positive closure, and a more straightforward. Energy saving, reduces over ventilating. Slimline vent design has clever two stage opening. We explain what trickle vents are, why you need them, and how to choose products with a. 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. AAC125HPCWL. It can be locked in the minimum as well as maximum flow position. #1. Butt hinges. There are many variables to consider in acoustic testing, please contact us for specific test figures on our range of trickle. Passivent’s Soundscoop acoustic air transfer unit also combines crossflow ventilation with exceptional acoustic attenuation. Technical Service: 01276 408402. Independently tested by Sound Research Laboratories in accordance with BSEN20140-10:1992, ISO140-10:1991. Really bummed out about this. RRP from £8. Trickle ventilators are typically manually maintained slots integrated into window frames. 57 Ex. We do get asked how to cure damp and mould around windows and the first question we ask is "what ventilation do you have in the room". Window vents, also known as trickle vents, are an effective way to improve indoor air quality in dwellings through passive ventilation. Downloads. Make £2023 in 2023. Across our Rose Collection, we offer expertly designed, beautifully authentic sash horns. Excludes countries outside Great Britain. The Simon Framevent HF & HF + tricklevent range have been designed to help comply with. Enquire now, call 01805 623721Trimvent vents all give optimum airflow. 5 year old house has trickle vents on every window, which let in a huge amount of cold air even when closed. model has been specifically developed for use with rigid. . 0800 970 4190. 400mm. These small trickle ventilators are designed to deliver controllable whole room ventilation. To cut a long story short I am sick of the amount of noise being let in through these vents, even when the vent is closed over with the cover. 85 +VAT. 497mm (5000EA) 215mm (5000EA) 173. Up to 47 db Dne W. 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 3470 FREE Same-Day Despatch with Next Working Day Delivery on All Orders Over £95*. Filter Products Airflow. Trickle Vents – Routed For Flush Fit. Fixing holes in the frame and cover caps. Acoustic Vents are the ideal solution to. [report] [news] Monday 29th January 2018. Generally, to gain maximum performance, the size of the acoustic attenuator should be mirrored on the vent and canopy; and. Meets requirements of building regulations F-2010+ amend 2013. VAT. Verified 3 months ago . 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. £3. 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. Glazed-in window vents are specifically designed to fit along the top of the sealed glass unit, between it and the frame, by reducing the glass height. 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. Size Name: 4000EA. 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. Product Description. Availability: Item stocked in our warehouse. Learn More. also available as 5000EA - 412mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) External. Ventilating buildings is about more than just the exchange of air. 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. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories. As the name suggests, these are trickle vents with added insulation. In the one beside ours without a trickle vent we can't hear a thing. The RW Simon Ltd TTF Slimline window trickle ventilator is a through frame trickle ventilator that is a robust, yet stylish aluminium ventilator. These new rules feature in Approved Document F, which provides guidance on adequate ventilation in properties, and will impact both new and existing homes, along with extensions and self. A comparison of two acoustic vents:1. Trickle vents are activated with a single finger and provides passive. Our largest vent, the TVALdB800, is capable of sound reduction up to 42dB Dn,e,w. co. aircycle 3. Trickle Vents are an excellent way to allow air flow and ventilation without the issue of dust, dirt, and insects. Donald BSc (Hons) AMIOA T: 0330 043 1764 Page 4 of 24 1. The unit has three fixed trickle speeds of 6l/s, 7l/s or 8l/s and two fixed boost speeds of 13l/s. Enjoy fresh air indoors with window vents. bulk or standard packed (as sets or separate internal ventilators & external grills) mix and match colours. 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. Acoustic trickle vents: noise-reducing acoustic vents are also available for external windows, facilitating the flow of air in and out of a building, while helping to prevent the ingress of external noise. AWS Trickle Vent system automatically adjusts the size of the ventilation inlet as ambient temperature changes. co. 4080mm² measured area 2500mm² Equivalent Area. Add to Wishlist. Adjustments to slot heights may be needed to achieve the EQA requirements.