Available in 3 standard sizes and six standard colours, the unit. Trickle vents are activated with a single finger and provides passive. Trickle facility to allow air ingress even when closed. also available as 5000EA - 412mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) External. 250-368mm L with air brick fitted. Delivery. SF Xtra Sound Attenuator (Acoustic) Vent FOR USE ON PVCU, TIMBER OR ALUMINIUM WINDOWS. Contact one of our experts. . Acoustic FV (Framevent) Supplied with a PVCu internal flap unit and aluminium external canopy. By buying this product you can collect up to 27 loyalty points . Trickle Vent Options. The trickle vent operates automatically. The trickle vent is essentially a slit in the frame, staggered on the inside and outside, with a cover that can be opened and closed. Order Before 9pm. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories and more. Waves is the ideal solution if, for practical reasons, a centralised ventilation system is not possible. Discover more. Burglar-proof performance is desired in some cases. 09 (ex. Add to Wishlist. Wind noise blowing across the vents if ours are anything to go by. External cup handle for external fitting. Acoustic performance of 33 Db and an EA rating of 4600, the V4000 is great value and available from stock for next day delivery. g. CLOSED. 55,000mm² equivalent area and space on the window profiles can sometimes be an issue. 50 a set, conform to Building regulations. These are hygro- or pressure-controlled devices, equipped with a connector and an acoustic hood. Doormaster. • Maintains the integrity of the rooms soundproofing. 4000EA. The SM 1000+ is a slim, unobtrusive surface mounted window vent that offers trickle ventilation. 99. Greenwood Air Management are well-known for being first to market in the ventilation industry. Trimvent® Select Xtra S13 FOR USE ON PVCU, TIMBER OR ALUMINIUM WINDOWS. For use on timber and upvc windows and doors. Here, you can find the fitting instructions for the Glazpart range of trickle vents used to deliver the required provision of back ground ventilation in dwellings. 85 +VAT. Features and benefits. We can offer a 20% better noise reduction than older style. Glidevale ALDB Acoustic Trickle Ventilator 8000mm. VAT. to the body to ensure acoustic performance is achieved. The drawing they have provided is an over the frame vent, and not typical. Ventilation helps you to protect the building fabric long-term, save energy and retain the value of your property. The aesthetically pleasing and patented design helps to reduce the visibility of the trickle vent on a window. 16 ex. 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. The EAR42W acoustic vent provides an outstanding Dn,e,w; 42dB (A) for areas with high external noise transmission and humidity control to regulate fresh air supply. This can cause health issues through humidity, such as dust mites and mould, or even impact on the long-term. VAT. SlimVent has been designed with. Whatever your query, please get in touch. Most types of vent are available in a choice of colours to best suit the window frame and be as unobtrusive as possible. In addition, we also offer our own trickle vents within Total Hardware’s exclusive range, Quantum. Mantis 4 . 5. Unique draught reducing panel manually adjusted with an easy. The SlotVent range comes in three sizes – 2500EA, 4000EA and 5000EA, which means they can be used on their own or in combination to reach the 4000mm 2, 8000mm 2, or 1000mm 2 Minimum Equivalent Area thresholds now required for bathrooms, kitchens and habitable rooms in either multi-storey or single-storey dwellings. Lockmaster. Glidevale Ultravent Trickle Ventilator External Canopy Grille. What is the purpose of vent in an aircon unit?Brookvent™ is an award-winning manufacturer of high-performance window ventilation systems and market-leading MVHR systems. New higher equivalent area confirmed by the BRE. 33, Chase roundup interest 65p, WeBuyBooks:£8. Manufacturers and suppliers of ventilation and euro hardware products; trickle ventilators to window handles, locking and hinge systems to mechanical ventilation products. Trickle Vents - Flush Fit (White - 300mm) £ 5. 79. View Product. Dramatically reduce installation time with an this slimline slotvent with an innovative clip-fitEnjoy fresh air indoors with window vents. Flush fit | White ABS Plastic | 300mm long x 20mm wide x 10mm deep (2,700 mm2 free area). The ProSound Acoustic Vent system in white is a high performing acoustic background ventilator, providing up to 55dB reduction (Dn,e,w) and suitable for wall thicknesses of 140mm and above. 66 Inc. Glass-fitting Ventilators. Retro-fitted core ventilator with external cowl for background room ventilation. 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. Universal Compatibility: Ventsys Adjustable Trickle Vents are compatible with various window types, uPVC, wood and aluminum. We are official stockists of Rytons Vents. New builds do not have to have trickle vents, if mechanical ventilation is fitted, which in my opinion should have been standard many years ago. Hit & Miss: 271mm L x 95mm H. Ventilation in windows and doors must extract excess water vapour, air pollutants and condensation. Air Brick: Terracotta, buff/sand, white, grey, blue/black, black, brown. uk +44 (0)28 9061 6505 GB All acoustic vent models have been independently tested in accordance with BS EN ISO 717-1:1997 (airborne sound insulation & BS EN 20140-10:1992) The Simon Acoustic vent canopy is available in white (RAL 9910 HIPCA satin), brown (RAL 8019 matt), black (RAL 9005 matt), tan (RAL 8003 matt), grey (RAL 7016 matt) and silver anodised as standard. All Glidevale Trickle Ventilators have been tested to meet the building regulations. English - United Kingdom. uk +44 (0)28 9061 6505SF Xtra Sound Attenuator (Acoustic) Vent FOR USE ON PVCU, TIMBER OR ALUMINIUM WINDOWS. One of the best performing acoustic window ventilators available in the UK. Choice of finish. ECOSlide uPVC sash windows come equipped with trickle vents as standard to meet Part F of Building Regulations. Attenuated natural ventilation options. Trickle ventilation system. Keep your trickle vents open. We supply acoustic ventilation from leading. This also allows them to be compliant with the latest building regulation requirements. Summary 1. Doing this will help further reduce echo. 62,Topcashback: £177. They are situated at the top of windows and can be easily adjusted through the use of cords, rods or simply by hand. The Slimline Ventilator will provide Trickle Ventilation in accordance with the Building Regulations 2000: Part F: Approved Document F1 October 2010 and Scottish Building Regulations October 2011 Standard 3. Doing this will help further reduce echo. 2 Acoustic Modules. Suitable for use in wall depths up to 360mm. RW Simon Ltd has an extensive range of Trickle Vents ranging in all different sizes to help achieve the amount of free area or equivalent area required to naturally ventilate a building in order to conform to building regulations, our range includes both. This is particularly important in areas where this is more likely to happen, including. This can be fiddly so it may be easier to cover the whole inside with acoustic foam before you start adding in the panels. Product Code: 12674. Secondary glazing does not need trickle vents which improves the acoustic performance. 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 ventilation can be provided to ensure there is always an adequate level of background ventilation. The more air that you allow through a ventilator, the worse the performance you will get with the acoustic performance. 1,393 posts. Our ventilation hardware provides optimum levels of air ventilation, and have been designed with security and energy efficiency in mind. The drawing they have provided is an over the frame vent, and not typical. Trickle ventilators provide ventilation to the room without the need to open the main window, reducing noise levels as a consequence. . Summary 1. Available in 2 sizes: This vent 2500EA - 250mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) External. V. SlimVent is available in 2500mm² and 4000mm² EA ratings. co. This makes the vent even easier to use. VAT. Substantial sound reduction of up to 39dB Dn,e,w. £7. RW Simon Trickle Vents. Although it is important for modern homes to be well insulated, properties still require a certain amount of ventilation in order to avoid problems with condensation and damp. Humidity sensitive options available. 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. Specifying one different pane thickness will increase sound insulation. Then simply cut a space in the foam to glue each panel in. Window Vents & Wall Ventilation. Q. Surface mounted slot ventilator. 894 The Crescent, Colchester CO4 9YQ United Kingdom. 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. co. 5mm (2500EA) 215mm (5000EA) 29. • Trickle vent • Acoustic trickle vent • Acoustic tile board • Shaped corners H All windows are supplied fully assembled and ready to install. Snap on cover panel. View Product. The SF Xtra Sound Attenuator vent is a compact and cost-effective acoustic slot ventilator that provides high levels of sound attenuation for PVCu, aluminium and timber windows. Units comprise of an aluminium outer frame joined to a seasoned hardwood timber surround. Stocking part F compliant window trickle vents from brands like Glazpart, Greenwood & RW Simon. The first stage of the acoustic assessment described by ProPG is to. 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. Reattach the air vent covers and you. also available as 5000EA - 412mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) External. Titon SF Xtra 13 Vent 465 x 23mm - White. View. The SM ACOUSTIC offers 2500mm2 EA airflow whilst simultaneously providing up to 40 db DneW sound reduction, even in the open position. UK Manufacturer of home mechanical ventilation systems and hardware for windows and doors, including handles, hinges, trickle vents and extract fans. Tel:. £59. Quantity: Add to cart. This is particularly important in areas where this is more likely to happen, including. With its built in updraught and various operating modes the TTF Slimline is suitable for all types of windows. The overall vent length. 6300mm². Trimvent® Select Xtra S16. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. VAT. 'usually' trickle vents in upvc/alu are 'in frame' as shown below (its the horizontal bar on the top of the frame)Passivent’s Soundscoop acoustic air transfer unit also combines crossflow ventilation with exceptional acoustic attenuation. The offer includes the following colour versions: white, anthracite, grey, chestnut and oak. 2) Are they straightforward to retrofit, ie do i just unscrew my existing vent, slide in the new one and screw in to place or is there more to it. Greenwood Acoustic 2500EAW. 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. Simon Ltd Air Management. Trickle vents ; Trickle vents. 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. Promote a healthy airflow. When acoustic ventilation is required this should also be considered at the design stage, as the noise factor may actually pre-determine the method of ventilation that will be used within the dwelling. Customers have expressed concern about acoustic insulation, but a home can be ventilated without the window being opened. With Waves, you get to enjoy all the benefits of demand-driven ventilation, without major renovation works. 0 ventilation system to keep your home ventilated effectively and energy-efficiently. W. View. Glazed-in, or overglass ventilators are custom-made to size and installed during fabrication to fit along the top of the sealed glass unit. 250-368mm L with air brick fitted. Quantity. Do trickle vents let in noise? So trickle vents are terrible for noise intrusion, look ugly and let the heat out. Tools, Fixings & Consumables. each. Trickle vents provide effective background ventilation in a home, which may help to minimise the severity of health problems like. Qty Glidevale ALDB Acoustic Trickle Ventilator 8000mm Add to Basket. A trickle vent above a French door is small and narrow in comparison. The purpose of trickle ventilators is providing a consistent flow of fresh air. Glidevale Fresh 99 & 99HdB Wall Ventilators Download. Most doors and windows are available with trickle vents as an optional extra, and the vents can be opened and closed at the homeowners’ discretion. Unfortunately, there’s no hiding the fact that they can look unsightly. Glidevale ALDB Acoustic Trickle Ventilator 4500mm Add to Basket. Please make any allowances for fittings beads, gaskets etc, or for manufacturing tolerances. The vents have an effective free area, in terms of how much air flows through, of around 4000 sq mm. The easiest and cheapest option seems to be replacing my basic trickle vents with acoustic vents. Keep your trickle vents open. Adjustable flap aluminium ventilator with acoustic attenuation, for glazing-in to windows, overframe or wall mounting. Cowled Super Acoustic Controllable LookRyt® AirCore® (Up to 50 dB Dn,e,w) Controllable air vent for background room ventilation. redeem. Acoustic performance tests by BRE Acoustics. Ideal for both timber and PVCu, the Framevent has been specifically developed for the volume market. About this product. Water sewerage refund: £170. Platinum 3 Star Euro Profile Cylinder. Surface mounted noise reducing acoustic trickle vent. Natural daylight, as well as natural ventilation, are recognised factors in improving the wellbeing of a building’s occupants. Find and specify trickle vents from top manufacturers with NBS Source. Resources. Glidevale Acoustic Energy Saver Humidity Sensitive Trickle Ventilator is a humidity sensitive, acoustic through frame window vent. 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. Glidevale ALDB Acoustic Trickle Ventilator 4500mm - White. Our windows include trickle vents to provide ventilation and to comply with the latest. The 13/16” dimensions are always constant; therefore the body length is always 1-5/8” shorter than the overall length. As I type this. Now, firstly, I know trickle vents are installed to ensure a property stays ventilated, etc, but mine are driving me mad! I honestly don't see the point in having double glazed windows that the benefits of which are to be energy and noise efficient, then whack a hole in the frame that negates the benefits of both!Cover the sides and top and bottom of your air vent with acoustic foam as you go. The glass thickness. Ventilation can be provided through any appropriate means. 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. Technical Information. 2500EA. 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. Acoustic Trickle vents. DG 1500; DG Standard; Thermal Break; PD; DG 75; DG 80; DGL 80; DGL SUPER; Over Frame Vents. Spend £250+ to Get an Extra 5% off. 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. Condensation reduction; If your home has a problem with. We supply trickle vents from manufacturers such as Greenwood, Glazpart and RW Simons. Yale Trickle Ventilators - Yale UK. Our window vents are subtly integrated into your façade — and their acoustic damping comes as a bonus. YS170. • Internal controllable trickle ventilator. Nineteen different Trickle Vents are reviewed from some of the performance aspects in this paper. This is due to sound reduction levels being measured differently for trickle ventilators when compared to windows. Glidevale ALDB Acoustic Trickle Ventilator 4500mm Add to Basket. wall. This is more representative of a design in the UK that relies on trickle vents for a natural ventilation solution. Recesses over a 16mm slot. Single. High performance acoustic vents such as Titon’s SF Xtra Sound Attenuator, are also said to offer vastly improved levels of sound attenuation. But yes you must have some form of ventilation, either trickle vents in the windows, acoustic trickle vents in the walls or a heat recovery system. Available in white or brown. Window ventilation is essential, and is also enforced by the building regulations. Aereco develops innovative ventilation solutions for residential and office buildings with a key concept: the modulation of airflow rates according to. 5. It will also provide far better ventilation, with a constant flow of clean, filtered air, than. Free area (maximum): 26,670 mm²/m. Installing attic baffles can help reduce energy bills,. Smallest acoustic window vents on the market. 9 Feb 2017. The acoustic vent is installed into a timber packer, which is fitted and sealed on site and can achieve a sound reduction value of Dn,e,w (C; Ctr) = 40 (-1; -2) dB, and an equivalent free opening of. Concealed and surface-mounted. They are there for a reason taping them up will only cause issues elsewhere. 89. External canopy grille (Glidevale Ultravent Grille, supplied separately) provides weather and 4mm insect ingress protection. Free postage. If you still think opening a window is the best way. Enquire. In reply to Lewis and Stevie, Builder can use better trickle vents and there are Acoustic Trickle Vents available, if Builder will not come back a local glazing company should be able to help. RRP from £34. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. 5 year old house has trickle vents on every window, which let in a huge amount of cold air even when closed. Ventilation in windows and doors must extract excess water vapour, air pollutants and condensation. The main performance concerns of Trickle Vents are the ventilation rate, thermal insulation, acoustic resistance, water tightness, and air permeability. 2500EA routing slot size: 192 x 13mm. The units are logarithmic, decibels (dB), so a factor of 30 would be 1,000 times below ambient acoustic noise (over some assumed frequency range). Trickle vents built into the frame will allow noise to seep into the room even when the window is shut tight. White Window Trickle Vents Ventilation UPVC & Timber Windows (#182414592060) ob (361). Ventilation systems. Designed and developed in the UK, Yales SlotVent allows an appropriate amount of air to pass through the window, helping to remove stale air and reduce condensation and mould, as well as enabling people in cities or near busy roads to benefit from ventilation without having to open their windows. 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. We are official stockists of Rytons Vents. They may be an excellent solution to cope with the current regulations but if the issue is noise, they can also. One of the most popular choices for passive ventilation. Place an order within 08h 51m 57s And we will send your order today. Glidevale Energy Saver Humidity Sensitive Trickle Ventilator automatically adjusts it flow rate in response to humidity levels in a room. Yale SlotVent is supplied with pre-fitted clips for easy installation with optional screw holes to fit optimal 13mm slot. 125 months. 78 (ex. Resources. Glidevale Protect offers a wide selection of roofing ventilation products suitable for all tile and slate roofs. • Multiple trickle vents may be required to meet minimum airflow requirements. 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). I find them more of a hinderence than anything and was wondering if anyone has any experience with ‘filling them’. The primary purpose of trickle ventilation is to remove polluted indoor air from a building and replace it with ’Fresh’outside air. hello@brookvent. Find out how to easily retrofit a trickle vent to your door with our step by step video to guide you. comRytons acoustic trickle vents for walls allows the occupant controllable ventilation with the comfort of reduced noise transfer from outside into the room. Went to a neighbour who had new stuff put in a cpl years with acoustic lamination and it was perfect - virtually completely silent. We are Closed 23rd - 26th December & 30th December - 1st January (Open as usual 27th 28th 29th December Back to normal Hours 2nd January 2024). through the frame trickle vents for all window types. [report] [news] Monday 29th January 2018. RW Simon Ltd has an extensive range of Trickle Vents ranging in all different sizes to help achieve the amount of free area or equivalent area required to naturally ventilate a building in order to conform to building regulations, our range includes both. 96, Prolific: to 31/8/23 £663. The products are made from high. Is it OK to cover air vents? You could mess with the air flow. However, the changes will not apply in relation to building work where a building. Ultra Vent and Grille; Energy saver humidity sensitive vent; Acoustic through frame. You can get acoustic trickle vents that are supposed to reduce sound from outside. VAT) Plastic trickle vents with fingertip vent adjustment. All Tools, Fixings & Consumables. Trickle Vents. Ones which are. These may be required by building regulations in. Window Vents & Trickle Vents | Zehnder Group UK | Zehnder Group UK Ltd Window vents, also known as trickle vents, are an effective way to improve indoor air quality in. Find and specify trickle vents from top manufacturers with NBS Source. Trickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. This can be fiddly so it may be easier to cover the whole inside with acoustic foam before you start adding in the panels. AAC125HPCWL. + VAT. If you already have pieces of egg crate pattern acoustic foam lying around, you can use them to plug your air vent. Inc. The ‘p’ (projection) dimension of each can vary depending on if it is open or closed. 5. Your cart will contain total 27 points that can be converted into a voucher of £2. AirLiner: Extends from. There are two width variants, one for use over a 13mm slot, the other for a 16mm slot. TAL4H&M- '9x3' Acoustic AirLiner® Set with Hit & Miss Ventilator (Up to 39dB Dn,e,w) Controllable air vent for background room ventilation. More information enquiries@titon. 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. Acoustic STC –TV250 Vent and Canopy – open 35dB – closed 49dB. The vents have an effective free area, in terms of how much air flows through, of around 4000 sq mm. 63cm². We had the double glazing firm come out that fitted the windows for something else so I. 50 a set, conform to Building regulations. 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. Trimvent® Select Xtra S13 FOR USE ON PVCU, TIMBER OR ALUMINIUM WINDOWS. 15. A surface mounted aluminium slot ventilator, the Titon SF Xtra Flat Fit Vent is ideal for new-builds or to be retro-fitted. Finish (inner and outer). Then simply cut a space in the foam to glue each panel in. THIS AREA IS CURRENTLY BEING UPDATED – PLEASE FEEL FREE TO DOWNLOAD BROCHURE FOR FULL INFORMATION>. Across our Rose Collection, we offer expertly designed, beautifully authentic sash horns. They are situated at the top of windows and can be easily adjusted through the use of cords, rods or simply by hand. Aquwall HY Products. 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. Acoustic; Window Vents; Ancillaries & Ducting; Controls; Discontinued Products; Outlet;. Developed in 2 sizes the vents performance will be 5000. | sales@windowware. The major design criteria of Trickle Vents are ventilation capacity, controllability, actuation, thermal insulation, air permeability, water tightness, climatic adaptation, security, and acoustic. The Simon Framevent HF & HF + tricklevent range have been designed to help comply with. Make £2023 in 2023. Core drilled – suitable for retrofit installations. 400mm Tan and White Trickle Vents (internal and external fittings) £9. Trickle Vents by "Simon" we have these vents available in various colours and sizes. Glidevale ALDB Acoustic Trickle Ventilator 8000mm. Buy As Trade Add to Basket. 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. RW Simon FV Acoustic Vent 400mm. Hybrid versions of these products provide part natural/part mechanical ventilation and operate in three modes – mixing, boost and passive. Unfortunately moisture in the air is common of everyday living and it needs to go somewhere and we need changes of air too. Now, firstly, I know trickle vents are installed to ensure a property stays ventilated, etc, but mine are driving me mad! I honestly don't see the point in having double glazed windows that the benefits of which are to be energy and noise efficient, then whack a hole in the frame that negates the benefits of both!Cover the sides and top and bottom of your air vent with acoustic foam as you go. They told me that as my windows would have trickle vents, the acoustic glazing would not be beneficial for noise reduction. What are acoustic trickle vents? Acoustic window vents are the answer! Our range of high-performing acoustic trickle vents for windows block out noise but let fresh air in to create a comfortable, well-ventilated environment that combats condensation. Verified 4 months ago . FREE DELIVERY on orders over £600 (£500 ex. VAT. Said to be bulky and unsightly . Window Acoustic Trickle Ventilator Sonovent. 5 year old house has trickle vents on every window, which let in a huge amount of cold air even when closed. Optional internal acoustic extension. Vent-Axia's large range of products are available for a wide variety of purposes and surroundings. VAT - Mainland UK Only (NB: Orders placed after 3pm Fri will be dispatched the. In reply to Lewis and Stevie, Builder can use better trickle vents and there are Acoustic Trickle Vents available, if Builder will not come back a local glazing company should be able to help. 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 environment that combats condensation. Lockable restrictor (160mm or 270mm) Click vent. Here’s some useful advice on how to achieve compliance. You’ll need to cut a section off the top to allow the air to pass through; 25-30% should be right. Discover how acoustic ventilation can improve indoor air quality and reduce noise pollution with Greenwood, the leading air ventilation system manufacturers in the UK. Meets World Health Organisation recommended reduction of 33dB. The purpose of trickle ventilators is providing a consistent flow of fresh air. Resources. Internal hit & miss grille manually adjusted with an easy sliding. Surface mounted slot ventilator. The acoustic Trickle Vents can also be powder coated to any standard RAL colour. Contact Us. Whilst trickle vents are published with acoustic values this can often be misleading due to the criteria on which they are valued. The short answer is no, you do not need trickle vents if you have a full mechanical ventilation and heat recovery system. You would have to research whether they would be suitable to retrofit to your windows. Lockmaster 21 .