A 550mm long, 22mm wide Greenwood trickle vent. • Multiple trickle vents may be required to meet minimum airflow requirements. FBC. Sleeves available to ensure full compliance. uk. Manufactured from PVC. . 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. 12 Window system Matrix 70 Sculpt Ver 1. 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. Quality trickle vents at a good price, well packaged and delivered on time. Free next day delivery available. You may find they are on 'keyhole' holes in the middle (ie screws are put in the frame before the vent is attached), then the outside screws are put in to secure. Greenwood Airvac CV2GIP white mains voltage continuous running de-centralised MEV. 21. Overall Length: 305mm. Greenwood UPVC Trickle Slot Vent 2500EA 250mm Long Hardware, Manufacturer: Greenwood £16. Trickle Vents fight condensation. This Range provides a cost effective solution to suit the needs of noise polluted sites. Greenwood trickle. Greenwood Trickle Slot Window F Vent for uPVC / Wood Double Glazing. Call us: 08432 898 554 - 03432 898 554. Constant volume single point extract fan. EAQ42W is an acoustic window vent suitable for new build and refurbishment and can be applied to most window profiles with add on sections. 89 to £20. Its design ensures controllable trickle ventilation in line with current. 01. 0 (2) 45 in stock. Cost effective sound attenuating (acoustic) trickle ventilator. Find many great new & used options and get the best deals for 3 Sets Of Greenwood 3000S White Window Trickle Vents UPVC Timber Slot Vent at the best online prices at eBay! Free delivery for many products!Window Trickle Slot Vent 263mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully. Continuous running ventilation system (4 pages)Greenwood Airvac SF90T Extractor Fan 4" (100mm) Centrifuglal with run-on timer. Greenwood UPVC Trickle Slot Vent 4000SFW 400 Long White Brown Caramel. Achieves 5000mm² Equivalent Area at just 410mm long. co. As low as £9. The external canopy provides excellent weather. . 95. A decentralised Mechanical Extract Ventilation (d-MEV) system is a low energy,. Discover how acoustic ventilation can improve indoor air quality and reduce noise pollution with Greenwood, the leading air ventilation system manufacturers in the UK. 5-10-163. 0 (0). Trickle Vent, Wooden / Plastic Windows (#264247587720) r7 (1334). A robust smooth slim elegant modern rounded design with integral fly screen in the. We are Closed 23rd - 26th December & 30th December - 1st January (Open as usual 27th 28th 29th December Back to normal Hours 2nd January 2024). Vent sizes available: V25, V50, V75 and canopy sizes: C25, C50 and C75. 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. Page 2 • CMEV. 4000mm² version - S13 2700EA. 01. Trickle Vents. The internal mechanism opens from. 50* £0. R. Trickle window ventilators ideal for both timber and PVC-u. This short demo shows you how the Titon trickle vents can be opened and positioned against draughts to deflect the air flow up to the ceiling or down to the. Achieves a water tightness limit of 400 p. Greenwood Vents 1. Manufactured from PVC. Tested in accordance with BS EN 1027:2000. 03. 609 sold. Greenwood Slotvent 4000 S uPVC/Timber Window Vent With Bottom Operation Switch - White . Operation: Front faced finger lever to open and close. £3. 60 (inc VAT) More Details . Supplied with internal controllable vent and white external grilles. RRP from £6. trickle vents a legal requirement for more quickly compare business energy whilst this option and one? Therefore is you are trickle vents a requirement for the end result of fitting a window or guardian and to ensure visitors due. This is the Greenwood 5000EA trickle vent which is one of the smallest Slotvent on the market delivering 5000mm² equivalent area through one single unit. 5 x 10mm, outer: 164. | sales@windowware. New . Available in White, Brown, & Tan finishes. Cowled Super Acoustic Controllable LookRyt® AirCore® (Up to 50 dB Dn,e,w) Controllable air vent for background room ventilation. Trickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. Framevent PVCu Ventilator. Versa Greenwood Slot Trickle Vent 305mm White - 3000s. Trickle vents built into frame of bi-fold doors – Image courtesy of aspirebifolds. Gift Certificates; Account; Order online or call us 01209 200564;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. RW Simon 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. As low as £14. 03. They are controllable, to give the option of having them open or closed. Acoustic Performance Dn,e,w to 42 dB (A) Colour - White. Greenwood F Vents 383mm 2500EA . Learn More . 0 out of 5 stars 3. These trickle vents can be retrofitted and are sold in singles. [email protected] 100 - 1628 Kebet Way, Port Coquitlam, BC, V3C5W9. Manufactured from tough and strong ASA plastic which is known for high. It has a slimline design, a small slot. Greenwood Trickle Vents No Fully Reinforced (M70) Fully Reinforcing Corner Protectors (M70) Yes Drainage (M70) Base Drainage CE Brackets (M70) Yes T&T Consealed Gearing T&T Consealed Gearing (M70) Vent specification : T&T hinged (left) Handle (M70) Satin Chrome Vent specification : T&T hinged (right) Handle (M70) Satin Chrome Frame FR2. 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 F Vent from Greenwood has a UPVC construction with an unobtrusive slimline profile and it is supplied with the option for clip-fit installation. This is the Greenwood 2500EA trickle vent which is one of the smallest Slotvent on the market delivering 5000mm² equivalent area through one single unit. 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. Greenwood 305mm SF Trickle Vents Front Operated. RRP from £6. All results are specifically tailored to your requirements and PDF copies can be saved and emailed easily. 6deliver update: Order before 12:00pm for same working day despatch ×AAC125HPCWL. Item in Stock ( 61 Available) Product Code: 2204. Suitable for timber, UPVC and aluminium. Ideal for night ventilation, does not compromise security. £1869. Where To Buy This Product. Greenwood UPVC Trickle Slot Vent 2500EA 250mm Long Manufacturer: Greenwood £16. Login for trade only low prices. Surrey. Greenwood ; R W Simon ; Colour / Finish. Front operated; 8000mm 2 version available;. 63 £5. I need to get trickle vents for my bedroom window. The cream 495mm vents Ral:9001 and the Ral:1015 are coated and can take from 7-18 working days before deliveryNew trickle vents are being launched to offer increased equivalent area air flow. Free postage. 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) ExternalFind Trickle Vents and Canopies in a variety of sizes, in addition to finishes that blend in seamlessly with both rustic and modern windows. Trimvent XR16 model window vent with a rating of 4600 EA (Equivalent Area). 55,000mm² equivalent area and space on the window profiles can sometimes be an issue. 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. 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. When choosing acoustic trickle vents, there are a few things you should keep in mind. Trickle Vents fight condensation. £5. Greenwood SB Vents (Bottom Mounted Operation) 400mm 3200EA . Learn More . This product is on. SF Xtra Sound Attenuator vents, University of Strathclyde. New. Greenwood UPVC Trickle Slot Vent 4000SFW 400 Long White Brown Caramel. 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. 70 . Habitable rooms minimum 8000mm2. Glazpart MK2 Link Vents Foil Effect. 0. Add to Cart. New. 5-10-1645 x 12mm. GU15 3AD. Trickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. Our Aluminium. Available online only and not stocked in B&Q stores Write a review £ 8. The Greenwood ones are the best mate. These slot vents are widely specified in social sector window replacement programmes to provide effective ventilation, while reducing mould and condensation. 05 Ex Tax: £9. 5. Description: Leaders in the supply of window ventilation systems, stockests of CPS, Greenwood, RW Simons & more. Past month;Greenwood L Window Trickle Slot Vent for uPVC Double Glazing Reduce Condensation. RRP from £6. 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. Acoustic trickle ventilators are an effective way to ensure that your home is properly ventilated, and also reduce noise levels. Supplied as a complete package, the internal mechanism opens from the bottom to provide easy trickle ventilation. 6mm ; Trickle Vents. At the same time, the trickle vents must not be smaller than those in the outgoing windows and have some manual or automatic control. 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. Buy Now. Air vents are usually installed within a wall to allow air to pass through, designed to promote air flow and improve ventilation. Espag Handles Tilt & Turn Handles UPVC Window Vents UPVC Window Espag Mechanisms Shootbolts Night Vent Keeps Friction Hinges. £17. Infinitely controllable ventilators allow for optimum air opening. Trickle Vents. Decentralised mechanical extract ventilation dmev (9 pages) Fan Greenwood Unity CV100 Installation Instructions. Available in white and supplied with D Vent for inner vent installation. Greenwood UPVC Trickle Slot Vent 5000EA 410 Long White. Its compact size, of. 350 sold. It has an innovative adjustable airflow feature which allows trickle and boost speeds toVentilation; Greenwood ventilators; Greenwood S Ventilators; Greenwood S Slotvent; Greenwood 6000S. This is the first step to ventilation becoming a controlled service within a dwelling and means systems will be inspected and tested prior to sign off by Building Control. Inc. Benefits. . Page 1 of 1. 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. Resources. . Find out how to easily retrofit a trickle vent to your door with our step by step video to guide you. 37. Its compact size, of just 410mm in. It is also important to note that the date on which the contract was signed by the customer has no. These are generally used in properties to help prevent mould and mildew from accumulating, particularly on bathroom or kitchen walls by allowing air to circulate from the outside in and vice versa. Unity CV3 is a smart continuously running (dMEV) fan from Greenwood - launched in November 2017. £764. 500+ bought in past month. For this reason, our solar powered vents will now be branded 4 SEASONS Solar Powered Vents. The Greenwood 5000 EA Slotvent is manufactured from aluminium alloy material with front control operation. Buy Now. 4. Widely specified, the S Vent range is broad. 43 Postage . If so, the new windows will need trickle vents. ventilation exhaust fan, operating continuously as the principal ventilation exhaust fan (see 9. The external canopy provides excellent weather protection from insects and draughts. Adjustments to slot heights may be needed to achieve the EQA requirements. Paxton Fob 695-644 Net2 Proximity keyfobs Box, one Color, 10 Count (Pack of 1) £4110. The system dilutes moisture in the air, which is then dispersed through trickle vents and natural ventilation leakage. Independently tested to BS EN 13141-1:2004. For the design, sizing and positioning of ventilators to provide effective ventilation using mechanical extract for less airtight dwellings expert advice should be sought. Close X. Available in a white colour. Fully controllable ventilation that can be closed or tilted open to 30°, 60° or 90°. What sets this apart from the rest is that it can distinguish between a hot humid summer's evening and a man-made. Titon manufactures and supplies window and door hardware products ranging from background ventilators and window and door handles, to locking systems, hinges and restrictors. Our trickle ventilator products are available for delivery as. Or fastest delivery Fri, 8 Sept. g. Take your pick from a wide choice of essential trickle vents, noise-reducing acoustic trickle vents and glazed-in louvre grilles, all available in a wide choice of sizes, specifications and colours, from leading brands RW Simon, Greenwood, Glazpart and Duco. Buy Now. deliver update: Order before 12:00pm for same working day despatch ×Trickle Vents by "Greenwood" we have these vents available in various colours and sizes. £6. Whether you need white trickle vents to fit a standard 70mm PVCu profile, slimline anthracite grey trickle vents to fit on aluminium windows or. How can we improve the . Greenwood’s 5000EA vent, known as Pyramid, and canopy is marketed in the UK as delivering 5000mm 2 EA, yet the independent tests revealed the actual figure to be just over 4000mm 2 EA. Independently tested by Sound Research Laboratories in accordance with BSEN20140-10:1992, ISO140-10:1991. The Greenwood Story. Email directly on [email protected] SB Vents (Bottom Mounted Operation) 305mm 2500EA . From The Anvil White Medium Aluminium Trickle Vent This product is easy to fit, suitable for many construction types and does not compromise on. 0 (3) 185 in stock. Our easy to fit Greenwood Trickle vents can be fitted to windows or doors (Upvc or timber). Clip-fi t and screw-fi x options. Suitable for timber and uPVC. Documents. Buy Now. £3. . 5000EA The smallest slotvent in the market Smallest slotvent on the market to offer 5000mm 2 Equivalent Area from one single unit. The Greenwood Acoustic vents provides the perfect solution, delivering an effective level of air replacement while keeping out unwanted noise. Whether you need white trickle vents to fit a standard 70mm PVCu profile, slimline anthracite grey trickle vents to fit on aluminium windows or. 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. £1138 (£11. It will enable a user to control the ventilation that comes through the window. Home > Products > Window & Door Hardware > Window Vents. 300mm Trickle vents BROWN - inside and outside fittings for timber and upvc windows and doors. Top ventilation brand Greenwood provides products that offer a combination of functionality and aesthetics, to upgrade any window to its full potential. The joint piece has an extra secure fixing it in to stop the vent from dipping on the middle over time. Call us: 08432 898 554 - 03432 898 554. Showing 12 of 18 Results. Leaders in the supply of window ventilation systems, stockests of CPS, Greenwood, RW Simons & more. Greenwood's wide range of products in stock at Window Ware include their wide range of slotvents to include the S, F, L, GB, and HD, as well as the DN acoustic variants. redeem. A robust smooth slim elegant rounded design. Greenwood Slotvent 4000 S uPVC/Timber Window. Trickle Vents & Canopies. £1999. Sizes. Trickle vents are NOT mandatory. VAT. Performance. 795mm White Trickle Vents (internal and external fittings) 795mm vents available in white only. Sleeves available to ensure full compliance. These Greenwood trickle vents are designed to provide continuous effective ventilation, helping reduce mould and condensation. Find many great new & used options and get the best deals for Greenwood Window Vents 4000S 400mm long at the best online prices at eBay! Free shipping for many products!The range includes trickle vents with 2500, 4000 or 5000 equivalent areas (EA), the measure of aerodynamic performance of the ventilator and the measurement specified in building regulations. 16" Mahogany Trickle Vent. 5Suitable for timber, UPVC, aluminium or composite windows. 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. Greenwood L Window Trickle Slot Vent for uPVC Double Glazing Reduce Condensation . Manufactured from PVC. Trickle Vents; Trickle Vents; Chlo Products Vents; Easy Vent; Delta Vents; Titon; Reson Window Vents; Greenwood ; Window Vent Templates; RW simon;Leading ventilation brand Greenwood Airvac, part of Zehnder Group UK, is thrilled to announce it has passed the 1 million unit sales milestone for its EA window vent range. Greenwood Slotvent 4000 S uPVC/Timber Window Vent With Front Operation Switch - Brilliant White . Titon's range of acoustic ventilation products, from basic. DELIVERY SERVICE UPDATE 20th June. Trickle Vents & Canopies. Can be retrofitted. The EA Series achieves the best acoustic performance for window ventilators in the UK – up to 45dB (A). These are usually fitted at the top of your window frames and you can open or close them as you like to manage the airflow. It will end up oozing out and coming down the frames/glass. These Greenwood trickle vents are designed to provide continuous effective ventilation, helping reduce mould and condensation. Greenwood trickle Vents No Trickle Vents Letter box (M70) No Letterbox Cylinder Type (M70) Standard Cylinder Cylinder Colour (M70) Silver Handle Colour (M70) Satin Chrome Frame GF1 Style code 4010. 95. Greenwood UPVC Trickle Vent 6000SFW Slot Vent 550mm Long in White or Brown Colour: White Or Brown Overall Length: 550mm Overall. Standard Through Frame Slotvent for passive ventilation, available in 3 sizes offering up to 4200mm² equivalent area. 5mm central gap). The Acoustic Window Trickle ventilation range offers a noise reduction of. 3 colour options; standard white, dark brown (mahogany), tan. 84. £45. This is the Greenwood 2500EA trickle vent which is one of the smallest Slotvent on the market delivering 5000mm² equivalent area through one single unit. Order and buy online. New . Greenwood F Vents 383mm 2500EA . Overall Width: 22mm. You Will Earn 3 points which is the equivalent of £0. Whether you need white trickle vents to fit a standard 70mm PVCu profile, slimline anthracite grey trickle vents to fit on aluminium windows or. Overall: 5. This is the new model that replaces the now obsolete S90T model. Currency:. Greenwood Trickle Vent 400 mm Simon Trickle Vent Recently Viewed. There is no standard size for trickle vents in the UK. 604-552-2990. RRP from £6. 70 . Ceiling or Wall-Mounted. RRP from £6. 22 Window system Matrix 70 Sculpt Ver 1. If you have any questions, please contact Zehnder Technical Services on ☎ 01276 408402. For use over 13mm slot. FREE Delivery. Omnique safe and secure window fan - The only window fan accredited by the Secured by Design Initiative The Greenwood Acoustic vents provides the perfect solution, delivering an effective level of air replacement while keeping out unwanted noise. £152. Its design ensures controllable. Greenwood 8000HD Trickle Vent HD Vent. Small 10mm rout. Surface-fixed, no recessing required. Internal wall constructions of between 100mm and 150mm. Where existing windows being replaced don’t have trickle vents, ventilation must be no worse than before. Load More. Slotvent Standard. 534 ratings. Provides an outstanding Dn,e,w;42dB (A. Acoustic trickle vents. 0. Slim, unobtrusive finish. 5mm (H) x 23mm (D) Manufactured from PVC. Size: 300mm. Window 5X Trickle Slot Vent 407mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable (5 Pack) 1,549. £8. All results are specifically tailored to your requirements and PDF copies can be saved and emailed easily. The 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. Performance & Dimensions. 6) Envirovent ECO dMEV T Continuously Running Extractor Fan. 85 +VAT. co. Black (2) Light oak (2) Mahogany (2) White (2) Length. 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. 88 Postage . £4. Suitable for timber, UPVC and aluminium. 5 x 10mm, outer: 164. 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. 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. 79 inc VAT. VAT) Login to add this product to your wishlist. Constant volume single point extract fan (2 pages) Fan Greenwood CMEV-3 Installation Instructions. 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. Veto Bags;Huge range of trickle vents from brands like Glazpart, Greenwood and RW Simon. Learn More . Trickle Vents by "Greenwood" we have these vents available in various colours and sizes. Product description. 2000B. uk. Reference CPS. The Unity CV2GIP features new GreenwoodThe Greenwood CMEV. Ventilation; Greenwood ventilators; Greenwood S Ventilators; Greenwood S Slotvent; Greenwood 4000S. 114 Window system Matrix 70. Available in white and brown with bottom operation. Can be fitted to give updraft or down–draft. The F Vent from Greenwood has a UPVC construction with an unobtrusive slimline profile and it is sup. 21 (ex. The Greenwood 5000 EA Slotvent is manufactured from aluminium alloy material with front control operation. View more EAR42W: Fresh air in or out – no noise. These items are dispatched from and sold by different sellers. 32. (Surface-Mounted Trickle Vents) are Titon, Greenwood, AWS, Masko, Brookvents and RW Simon (Figure 6 and Figure 8). Where To Buy This Product. £699. £524. Greenwood FB Trickle Slot Window Vent for uPVC Double Glazing for Condensation. Greenwood F Vents 383mm 2500EA . Leading trickle ventilation expert, Greenwood Window Vents has launched the 5000EA trickle ventilator; the smallest product on the UK market that delivers 5000mm2 equivalent area. Greenwood trickle and acoustic vents. Greenwood UPVC Trickle Slot Vent 2500EA 250mm Long White. 3 items. FREE delivery Sun, 20 Aug on your first eligible order to UK or Ireland. As low as £15. Our Trickle Vents have been tested to BS 13141-1:2004 – Equivialent Area figures as required by approved document “F” 2010. Glazing Insider Thank you for watching, if you have an idea for a video feel free to get in touch. Email directly on assist@dgpsuk. 02. AC1 Window Vent with 1 Acoustic External Module, White. Trickle Vents by "Greenwood" we have these vents available in various colours and sizes. 0. £16. These trickle vents. 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. Send us a message. 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. Includes internal and external canopies which neatly cover routed slots to comply with building regulations internal canopy features front faced finger controlled lever to open and close vent as required. Adjustments to slot heights may be needed to achieve the EQA requirements. Greenwood Humidity Control Vent (White ) Call us: 08432 898 554 - 03432 898 554. Home > Products > Window & Door Hardware > Window Vents. Buy Now. You Will Earn 3 points which is the equivalent of £0. Window ventilation is important for a number of reasons but with these replacement vents you have a UK design with controllable.