if you can't find what you are looking for please ask us we. Trickle vents are adjustable vents situated at the top of a window or door to allow ventilation. Upvc Casement Tilt Turn Window Ventilation Restrictor Arm White Brown. Trickle vents, a small slot in a window that can be manually opened or closed to allow for ventilation, have been required in some settings for quite a while. Log In. FREE delivery Fri, 27 Oct on your first eligible order to UK or Ireland. 00. Water tightness of 400pa. 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. 99 Inc Vat. Buy Trickle Vents and get the best deals at the lowest prices on eBay!. • All our Quality Trickle Vents carry a 3 years guarantee we also sell Trickle Vent Canopies just ask. PIV - Positive Input Ventilation - is a system that supplies fresh filtered air from a well-ventilated loft space or via a wall-mounted unit and delivers it into the house via a ceiling-mounted diffuser. Call us: 08432 898 554 - 03432 898 554. Where To Buy This Product. Variable control allowing users to fully or partially close the internal vent achieve the desired flow of natural ventilation. £1499. The range of colours and wood grains can vary depending on the supplier, but. 5. £152. Foam gasket on the internal vent reduces air leakage by at least 40% and offers a reduction in both noise and draughts. Item in Stock ( 61 Available) Product Code: 2204. As low as £9. . Continuous Ventilation offers an all round low energy, low noise solution for tenants - and it protects the building effectively. ). Contact. 4eHT Mechanical Extract Ventilation (MEV) System Installation Instructions Commissioning Data: To be completed by the Commissioning Engineer. 57 + £11. co. It is available in a wide range of colours to match REHAU profiles, and the Link-vent 5000 closure plate is split to allow for 50% opening and further ease the. The changes to Approved Document F – Background Ventilation require the majority of replacement windows and doors to be fitted with trickle vents. The Greenwood 2500 EA Slotvent is manufactured from aluminium alloy material with. 12 Window system Matrix 70 Sculpt Ver 1. The S Vent is a classically styled through-frame Slotvent that provides background passive ventilation in line with the requirements of the current Building Regulations ADF 2010. Achieves up to 2634mm 2 Equivalent Area (England & Wales) Bottom operation. All of our Trickle Vents and Canopies are built to last, manufactured by industry-renowned brands like Greenwood, meaning you’ll have fresh air everywhere that you need it for years to come. RRP from £6. Greenwood L Vent provides an unobtrusive ventilation solution in line with current Building Regulations and has been designed for use on low profile window frames with limited slot heights. Ideal for night ventilation without compromising security. Slotvent 3000 S With Bottom Operation Switch - White available at great trade prices with easy and free returns. You Will Earn 3 points which is the equivalent of £0. Posted on 18-10-2023 . The joint piece has an extra secure fixing it in to stop the vent from dipping on the middle over time. 21 (ex. Greenwood UPVC Trickle Slot Vent 2500EA 250mm Long Hardware, Manufacturer: Greenwood £16. The slimline design ensures an unobtrusive finish and once fitted the vent can be closed and opened as necessary. 95. Browse the full range of Carl F Groupco ventilation systems here, including ventilation fans, fan grilles, and flexible ducting. Greenwood EA 2500 Trickle Slot Vent White Colour For Upvc Window Ventilation . Greenwood Trickle Vents No Trickle Vents CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Restrictors (M70) No Frame FR2 Style code 2. posted. Greenwood trickle and acoustic vents. As the UK's leading supplier of trickle ventilators, we provide the most comprehensive selection of aluminium and pvc-u products, including glazed-in and slot ventilators. 4. 60. Greenwood Acoustic window ventilator (White ) Quantity. 1 2 > Ventilation Systems We are experts in the design, manufacture, specification and supply of residential ventilation systems. How can we improve the . As low as £15. Operation: Sizes: Height: 22mm; Notes: PackagingWindow Trickle Slot Vent 407mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable. Buy Now. Performance & Dimensions. Premium Quality Trickle Vents Trickle vents are a great solution for condensation and moisture build up which you may have in the area of your windows by drawing the moisture outside through the vent. £11. Height: 23mm; Upward and downward air deflection options; Available in 305mm, 400mm and 550mmGreenwood Trickle Vents No Trickle Vents CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Restrictors (M70) No Shape : As viewed from outside #PST-ID:plain# Order Number Job No:- 623698 Frame Schedule Contract Number Delivery Date 30/06/2022 Customer Name VICAGreenwood Trickle Vents No Trickle Vents CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Restrictors (M70) No Frame FR2 Style code 3002. These Greenwood trickle vents are designed to provide continuous effective ventilation, helping reduce mould and condensation. Add to Basket. From The Anvil White Medium Aluminium Trickle Vent This product is easy to fit, suitable for many construction types and does not compromise on. Greenwood Airvac CV2GIP Features. Fixings: The screw fixing holes are set approximately 10mm from. Nineteen different Trickle Vents are reviewed from some of the performance aspects in this paper. Trickle Vents fight condensation. It has an innovative adjustable airflow feature which allows trickle and boost speeds toVentilation; Greenwood ventilators; Greenwood S Ventilators; Greenwood S Slotvent; Greenwood 6000S. These trickle vents can be retrofitted and are sold in singles. UK Manufacturer of home ventilation systems and residential hardware for windows and doors, including handles, hinges, trickle vents and extract fans. Positive open and close action. 6deliver update: Order before 12:00pm for same working day despatch ×AAC125HPCWL. 550mm. Habitable rooms minimum 8000mm2 Kitchen minimum. The concept revolves around ‘one product’, which has been designed to be flexible in application (ceiling and wall installations) and to meet the performance requirements of all ‘wet’ rooms within a dwelling. Continuous ventilation has many benefits and offers solution to many social housing issues - especially mould and condensation mould and condensation. 3. Deflects air up or down, or both; option of complete closure. All of our Trickle Vents and Canopies are built to last, manufactured by industry-renowned brands like Greenwood, meaning you’ll have fresh air everywhere that you need it for years to come. Sort by:Trickle Vents, known also as background ventilators, are natural ventilation devices which can be integrated into façades or window systems as an alternative to operable vents, specifically in high-rise buildings. Our continuous running fans offer the lowest power consumption, minimal noise levels, and low life-cycle costs. 6 Frame colour White Glass specification (1) Flat panel Grey on White (Hurst)Greenwood Trickle Vents ) No CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Frame FR2 Style code 2001. £764. The Airflow iCONstant is the perfect choice for a quiet, reliable, and efficient ventilation solution. Latest News. All results are specifically tailored to your requirements and PDF copies can be saved and emailed easily. 0 (3) 185 in stock. The ventilator has been designed with upward air deflection to eliminate replacement air. Trickle vents will help avoid problems associated with poor ventilation in naturally. 42. Chlo Products Ltd Unit F, CLumber House High Street Chesterfield S45 9DP United Kingdom Call us: 08432 898 554 - 03432 898 554 Fax: 0872 115 6977SKU: TP640HD. By buying this product you can collect up to 27 loyalty points . Continuing Professional Development. Award Winning Service; Free Next Day Delivery* Order by 3:30pm; LoginThe Greenwood SF Vent is a discreet through-frame Slotvent that provides background ventilation in line with the requirements of the current Building Regulations ADF 2010. Our range of trickle vents give your home a gentle air flow, creating a healthier environment that also combats mould & damp. Suitable for use on UPVC and timber window frames. Benefits & Installation. 2 Acoustic Modules. With an extraction rate of up to 21 litres per second and 75. £7. Greenwood Trickle Vent L Vent is a PVCu window ventilation system that allows trickle ventilation in line with current Building Regulations. BPD Store stocks Passivent’s range of window tricklevents. Trickle Vents. Greenwood Trickle Vents No Trickle Vents CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Restrictors (M70) No #PST-ID:plain# Order Number Job No:- 624996 Frame Schedule Contract Number Delivery Date 25/10/2022 Customer Name VICA Customer Reference Ref:- 10441 (G) NovakGreenwood Trickle Vents ) No CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Window Locking (M70) Shootbolt Locking Handle Type (M70) Std Inline Locking Handle Colour (M70) Black Hinge (M70) DGS Hinge Frame GF1 Style code 4012. Each model is able to be installed with the option of two equivalent areas (2000/2500 mm² ea or 4000/5000mm² ea) meaning lower stock requirements. 16" White Trickle Vent. 300mm x 20mm ; 400mm x 20mm ; 795mm x 16. Window ventilation is important for a number of reasons but with these replacement vents you have a UK design with controllable. Free next day delivery available. Positive open and close action. Please note that these changes are for England ONLY. £3. £1138 (£11. 95. Simple enough job to retro fit trickle vents to window heads, Window manufacturers will stock them in colour to suit. 79 inc VAT. 2700mm equivalent area achieved with a 12. Free Postage. These Greenwood trickle vents are designed to provide continuous effective ventilation, helping reduce mould and condensation. Keywords: Trickle Vents,window vents,chlo products trickle vents,greenwood trickle vents,slot vent,trickle ventilation,air vents,window air vents,air bricks,soffit vents,door locks,window handles,replacement window. 1 Frame colour White Glass specification (1) 28mm IronTgh/Sw-Arg/Tot+Tgh 1. Place an order within 08h 51m 57s And we will send your order today. 300mm Trickle vents BROWN - inside and outside fittings for timber and upvc windows and doors. 5. 4. The vents are designed to allow the passage of air and reduce heat loss, and are available in various sizes and colours. 60 To £6. ago. Window & Door Hardware. This product is on. Bottom Operation. Save 5% on any 4 qualifying items. 6 Frame colour White Glass specification (1) 28mm Unglazed Door operation Open OUT Handle height 1000mm Frame (All) 58mm. Please note that these changes are for England ONLY. With more and more property developments being built on brownfield sites, near busy traffic. Vent sizes available: V25, V50, V75 and canopy sizes: C25, C50 and C75. I need to get trickle vents for my bedroom window. Login for trade only low prices. 09 to £10. If you have any questions, please contact Zehnder Technical Services on ☎ 01276 408402 Greenwood trickle and acoustic vents These Greenwood trickle vents are designed to provide continuous effective ventilation, helping reduce mould and condensation. Trickle Vents; Trickle Vents; Chlo Products Vents; Easy Vent; Delta Vents; Titon; Reson Window Vents; Greenwood ; Window Vent Templates; RW simon; Mighton Window Vents;Ventilation Hood Greenwood Unity CV2GIP User/Homeowner Manual 9 pages. 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. Send us a message. Section 4: How to use your ventilation? In order to ensure the ventilation in your building works as well as possible, you should: Always leave trickle vents open and unblocked, even in winter. £4. Page Resources Breakdown. VAT) Login to add this product to your wishlist. Easy to fit and durable, the vents are available in a choice of colours, including Standard White, Bright White, Dark Brown, Tan, Cream, as well as dual colour options on specific models. Top-rated Plus seller . (3) Using a. UV stable. uk. 464 sold. Window 5X Trickle Slot Vent 407mm Brown for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable (5 Pack) 4. Trickle vents should provide 4,000mm 2 EA in each habitable room: NOTE: The guidance for mechanical extract ventilation is suitable for highly-airtight dwellings only. 37. £11. £11. 76. 5mm central gap). ForumsOur choice of products from Greenwood includes the very effi cient aluminium 5000EA, which is also the smallest Slotvent currently available, the slimline clip-fi t F Vent for “through frame” applications, and the ultra-slim L Vent, which utilises a small, 10mm rout, and is suitable for profi les with limited space. Merriway BH05603 Windows and Door Fully Adjustable Trickle Vent 400 mm (15. View more triCKlE VENt rEquirEMENtS table 1. Independently tested by Sound Research Laboratories in accordance with BSEN20140-10:1992, ISO140-10:1991. All results are specifically tailored to your requirements and PDF copies can be saved and emailed easily. Save 5% on any 4 qualifying items. Window Vents to efficient Heat Recovery Ventilation systems. Although the vent can be closed, they. 3 colour options; standard white, dark brown (mahogany), tan. The changes to Approved Documents F, L & O come into effect from the 15th June 2022. CAR WINDOW TINT FILM TINTING DARK BLACK SMOKE 20% 50cm x 3M NEW . 57. Provides an outstanding Dn,e,w;42dB (A. Free Postage. (Surface-Mounted Trickle Vents) are Titon, Greenwood, AWS, Masko, Brookvents and RW Simon (Figure 6 and Figure 8). How to fit trickle vents - a short guide. The Greenwood plastic trickle vent is available in both 12" and 16" and is used to provide continuous effective ventilation on windows, helping to prevent mould and condensation. 85 +VAT. Our Trickle Vents have been tested to BS 13141-1:2004 – Equivialent Area figures as required by approved document “F” 2010. RRP from £6. Buy Now. Products suitable for. W. View more EAR42W: Fresh air in or out – no noise. GB DIY Store 5 x uPVC Window Trickle Slot Vent White 300mm White - Reduces Condensation, Damp & Steam (5 Pack) 73. £5. 1,590. Trimvent XR16 model window vent with a rating of 4600 EA (Equivalent Area). Suitable for low profile window frames. Greenwood UPVC Trickle Slot Vent 3000SFW 305mm Long x3 Colour Options. Manuals and User Guides for Greenwood Unity CV2GIP. Greenwood F Vents 383mm 2500EA . Exam delight for Jonathan, passing Stage 2 of the GAI Certificate in Hardware. each. We have 3 Greenwood Unity CV2GIP manuals available for free PDF download: Installation Instructions Manual, Homeowner's Manual, User/Homeowner Manual. Ventilation Hood Greenwood Unity CV2GIP User/Homeowner Manual. Greenwood Trickle Vents No Trickle Vents CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Restrictors (M70) No Frame FR8 Style code 56. They are controllable, to give the option of having them open or closed. Features and benefits: Provides 2500mm² equivalent area from a single vent; Available in 2 sizes: This vent 2500EA - 250mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) External Find Trickle Vents and Canopies in a variety of sizes, in addition to finishes that blend in seamlessly with both rustic and modern windows. Greenwood UPVC Trickle Slot Vent 4000SFW 400 Long White Brown Caramel. Technical Document 1. Positive open and close action. . Product description. It is also important to note that the date on which the contract was signed by the customer has no. Slim, unobtrusive finish. Free postage. Within this category you will find a huge range of trickle vents for wooden, Upvc & aluminium windows. PVC –U and aluminium vents available. 5 x 341mm slot (including 15. It also has an intelligent humidity sensor that will automatically activate the boost speed when the humidity reaches your preset point. Suitable for PVCu, timber and aluminium windows & doors. As the through the frame-type trickle vent is the easiest to fit on a DIY-basis, these are the tools and products needed to fit one: Chosen type of through-frame trickle vent; Pen/pencil for marking vent. Greenwood SB Vents (Bottom Mounted Operation) 305mm 2500EA . Includes internal and external canopies which neatly cover routed slots to comply with building regulations. Keywords: Trickle Vents, window vents, chlo products trickle vents, greenwood trickle vents, slot vent, trickle ventilation, air vents, window air vents, air bricks, soffit. Greenwood UPVC Duco Trickle Slot Vent 2000SFW 232mm Long in Brown. 11 Window system Matrix 70. 2 Window system Matrix 70 Sculpt Ver 1. uk. 43 Postage . Orders for stock items received by 1pm (Mon – Fri, excluding bank holidays and holiday shutdowns. Reference CPS. 16 years ago. 795mm White Trickle Vents (internal and external fittings) 795mm vents available in white only. The Unity CV2GIP features new GreenwoodThe Greenwood CMEV. Suitable for timber, UPVC and aluminium. 0 (2) 45 in stock. 16" Mahogany Trickle Vent. £7. Passivent’s range of natural ventilation products includes wall and window ventilators and roof mounted ventilation terminals, all of which can be linked to an intelligent or stand-alone control system. A little tip when fitting the vents, go into the top of an opening window/sash as this is much easier than trying too get it through the top of the frame. Whether you need white trickle vents to fit a standard 70mm PVCu profile, slimline anthracite grey trickle vents to fit on aluminium windows or chartwell green trickle vents to blend with modern flush sash windows, we’ve got a huge range of colours. They provide a constant air flow without compromising on the security of your home making them perfect ventilation on hot days. Leaders in the supply of window ventilation systems, stockests of CPS, Greenwood, RW Simons & more. These trickle vents can be retrofitted and are sold in singles. Ceiling or Wall-Mounted. The Greenwood Acoustic vents provides the perfect solution, delivering an effective level of air replacement while keeping out unwanted noise. Add to basket Awenta 130x130mm 110mm Duct Wall Ventilation Grille Cover Net Pull Cord Shutter. The independent testing substantiated the claimed performance data of the Titon Trimvent Select, SF Xtra and SFX Sound Attenuator trickle vents. Widely specified, the S Vent range is broad offering 3 control options and 7 colour variants. Trickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. 500+ bought in past month. Greenwood 305mm SF Trickle Vents Front Operated. Colour: White. New trickle vents are being launched to offer increased equivalent area air flow. Greenwood UPVC Trickle Slot Vent 6000SFW 550mm Long in White or Brown. Acoustic window ventilator. It is. Titon manufactures and supplies window and door hardware products ranging from background ventilators and window and door handles, to locking systems, hinges and restrictors. Call us: 08432 898 554 - 03432 898 554. Add to Cart. There are alternatives and many self builders go for whole house ventilation with heat recovery, which is one way of avoiding them. Order and buy online. Manufacturer. Greenwood UPVC Trickle Slot Vent 4000SFW 400 Long White Brown Caramel. Greenwood UPVC Trickle Vent 3000SFW Slot Vent 305mm Long in White, Brown or Caramel. Carl F Groupco stock compliant vents from Glazpart, Greenwood, RW Simon and Yale. a short cleaning tip on how to clean your trickle vents on windows, upvc window vents. Whether you need white trickle vents to fit a standard 70mm PVCu profile, slimline anthracite grey trickle vents to fit on aluminium windows or. They’re especially good for tackling issues like dampness and mould. These vents can be fitted to open upwards or downwards (internal part only) • Supplied with all caps and fixing screws • All our Quality Trickle Vents carry a 3 years guarantee we also sell Trickle Vent Canopies just ask. FREE delivery Wed, 4 Oct on your first eligible order to. Yale SlotVent – Singles 252mm 2500EA. Provides an outstanding Dn,e,w;42dB (A. 63. Surrey. This SB series trickle vent is 400mm wide, can be retrofitted and features pull-cord operation. Greenwood SB Vents (Bottom Mounted Operation) 400mm 3200EA . 3 colour options; standard white, dark brown (mahogany), tan. Screw cover caps to suit the Greenwood 'S' style vent. Positive open and close action. Greenwood SMART technology: Greenwood HumidiSMART™ Unlike others, Centair CMEV. Learn More . 01292 280 111. Change. For the design, sizing and positioning of ventilators to provide effective ventilation using mechanical extract for less airtight dwellings expert advice should be sought. £7. 1 Home Entertainment Tech Resource Home. 95. RRP from £6. 91 sold . Perfect for new build. 114 Window system Matrix 70. An ideal solution for landlords and tenants, where everyday activities such as bathing, cooking and showering creates steam and smells which will be reduced by the constant ventilation of Greenwood CV2GIP 365 days a year. I have found a few online, Greenwood, Titon, Simon etc but the more I read the more confused I am getting. 6 Frame colour White Glass specification (1) 28mm Unglazed Glass specification (2) 28mm Unglazed Frame (All) 67mm Outer Frame (M70)Greenwood Trickle Vents ) No CE Brackets (M70) Yes Corner Protectors (M70) Yes Drainage (M70) Base Drainage Frame FR3 Style code 2002. £8. Technical Tips and Support. Show. 85 £3. The Greenwood 5000EA slotvent is the smallest on the market, delivering 5,000mm² equivalent air flow through one single unit. It will end up oozing out and coming down the frames/glass. favorite_border. Buy Now. Achieves a water tightness limit of 400 p. hinges, trickle vents and extract fans. Key Stats; Available in two models offering 1600mm² and 3200mm² equivalent area (England & Wales) Available in two models offering 2000mm² and 4000mm² free area (Scotland)Stocking part F compliant window trickle vents from brands like Glazpart, Greenwood & RW Simon. VEN99990 | VEN99991 |. Ventilation; Greenwood ventilators; Greenwood S Ventilators; Greenwood S Slotvent; Greenwood 4000S. Buy Trickle Vents online - this how-to guide we will be showing you how to replace a Titon Trimvent Select Tr. Ventilation building regulations have recently changed in England and Wales. Suitable for timber, UPVC and aluminium. If you need replacement window vents for your double glazing look no further. HD Vent is a shutter style slotvent offering high equivalent area performances from two models and is available in a range of colours. Log In. Ironically, the spare bedroom (which faces a railway line) has acoustic vents through the wall rather than trickle vents through the window frames and it is. Tested in accordance with BS EN 1026 & 1027:2000. Performance & Dimensions. Total price: Add both to Basket. Greenwood Slotvent 3000 S uPVC/Timber Window Vent With Bottom Operation Switch - White . Snap on quick fit end caps. Zehnder ComfoAir Range. Trickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. The system dilutes moisture in the air, which is then dispersed through trickle vents and natural ventilation leakage. Models & Control Options. Using Our Jig. 3342 sold . 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 UPVC and Aluminium. We supply the Frame vent range of trickle vents from RW Simon, designed to satisfy the requirements of uPVC, aluminium and timber windows. Available in white and brown with bottom operation. The Greenwood ones are the best mate. BPD Store stocks Passivent’s range of window tricklevents. RRP from £6. The Brown Version is Now Obsolete. Add to basket. Greenwood Airvac. £524. £1999. Greenwood through frame sash trickle vent. Greenwood Acoustic window ventilator (White ) Quantity. Promotion Message Save 5% when you buy £75 of select items 1 promotion. When using a long vent this helps considerably! Features. Overall Width: 22mm. Sonair Units, Hassocks, West Sussex. Greenwood Airvac provides a full design and quotation service and advises on suitable product Greenwood Trickle Vent F Vent Our easy to fit Greenwood Trickle vents can be fitted to windows or doors (Upvc or timber). Greenwood Slotvent 4000 S uPVC/Timber Window Vent With Bottom Operation Switch - White . This Slimline Window and Door Trickle Vent (also known as a perma vent) is for use on double glazed uPVC, timber, and aluminium windows/doors. Login for discounted trade prices. Noise pollution is becoming an ever bigger problem as the utilisation of Brownfield and inner city sites increases. Past month;Greenwood L Window Trickle Slot Vent for uPVC Double Glazing Reduce Condensation. AC1 Window Vent with 1 Acoustic External Module, White. Also known as dMEV fans, these innovative and energy-efficient solutions operate at a low-level trickle rate, continuously extracting stale and moist air. The Envirovent ECO dMEV T is a continuously running extract ventilation fan that boasts up to 5 adjustable trickle speed settings, a timer overrun adjustable from 1 to 30 minutes, and a power consumption of up to 16 watts. 99. Snap on quick fit end caps. Ventilation building regulations have recently changed in England and Wales. Our easy to fit Greenwood 8000HD Trickle vents can be fitted to windows or doors (Upvc or timber), as an aid to controlling condensation. Easily adjusted through the intended, there are partially open a service. Sleeves available to ensure full compliance with BS7412:2002 . The ventilator has been designed with upward air deflection to eliminate replacement air causing draughts. Clip fit fixing is an innovative time saving solution which is convenient for the busy. Front operation only. information on this page?Slotvent 4000 S With Front Operation Switch - Brown available at great trade prices with easy and free returns. All of the vents are tested to BS EN 13141-1: 2004 Ventilation for Buildings, as detailed in. Cowled Super Acoustic Controllable LookRyt® AirCore® (Up to 50 dB Dn,e,w) Controllable air vent for background room ventilation. Free. 5mm (H) x 23mm (D) Manufactured from PVC.