Helps to prevent mould and mildew. 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. All Glidevale Trickle Ventilators have been tested to meet the building regulations. 8 mm in the Enhanced range. £59. However, the changes will not apply in relation to building work where a building. The vents have an effective free area, in terms of how much air flows through, of around 4000 sq mm. Energy saver humidity sensitive vent. This can be fiddly so it may be easier to cover the whole inside with acoustic foam before you start adding in the panels. Special colours available on request for all trickle vents; Felted gasket for increased performance; When specified correctly complies with Building Regulations; Technical Information Close . As I type this. Glidevale Protect offers a wide selection of roofing ventilation products suitable for all tile and slate roofs. An acoustic version is also available, developed to satisfy the ever increasing demands for noise reduction whilst providing the desired ventilation levels. NBS Source. Our window vents are subtly integrated into your façade — and their acoustic damping comes as a bonus. Platinum 3 Star Euro Profile Cylinder. This is more representative of a design in the UK that relies on trickle vents for a natural ventilation solution. W. Existing homes. Trickle Vents – Routed For Flush Fit. Acoustic test data available upon request. The Invisivent ® Air and Comfort window vents by Renson ® are controlled by the smart Healthbox 3. The Easyvent 3000 white trickle vent is made from Acrylonitrile Styrene Acrylate (ASA), a much tougher and durable plastic than PVC. Many types of vent offer 2500mm² of air space each, so typically smaller windows in small rooms require 1 vent and larger windows (e. All buildings have to be ventilated in order to maintain the health and well being of everyone using them. Special sizes available. EAR42W: Fresh air in or out – no noise. Air Leakage – 0. 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. Air Leakage – 0. 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. blackthornjohn • 6 mo. 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. In the one beside ours without a trickle vent we can't hear a thing. UK Manufacturer of home mechanical ventilation systems and hardware for windows and doors, including handles, hinges, trickle vents and extract fans. [report] [news] Monday 29th January 2018. There are two width variants, one for use over a 13mm slot, the other for a 16mm slot. White. The unit has three fixed trickle speeds of 6l/s, 7l/s or 8l/s and two fixed boost speeds of 13l/s. Up to 47 db Dne W. Concealed and surface-mounted. The ‘p’ (projection) dimension of each can vary depending on if it is open or closed. V. 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. 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. posted. THIS AREA IS CURRENTLY BEING UPDATED – PLEASE FEEL FREE TO DOWNLOAD BROCHURE FOR FULL INFORMATION>. All new builds since the early 1990’s require passive ventilation and the easiest and simplest form of achieving this has been trickle vents in windows and doors. Noise assessments results will require acoustic dB reduction in noise transfer through openings in the facade of the dwelling from ventilation. 66 Inc. 16 years ago. For many homeowners,Construction Industry Professional, Yoga Teacher and Life Enthusiast Report this post Report ReportThe trickle vent areas indicated in ADF to provide whole dwelling ventilation rates are based on calculated air. I spoke to a window company about their acoustic glazing range. Continuous Ventilation offers an all round low energy, low noise solution for tenants - and it protects the building effectively. Using Trickle vent to reduce noise. Achieves Building Regulations’ EA requirements. External grille provides weather protection and insect ingress. Acoustic performance of 33 Db and an EA rating of 4600, the V4000 is great value and available from stock for next day delivery. Lockmaster® 28mm . Our windows include trickle vents to provide ventilation and to comply with the latest. Vent-Axia PIV brochure - Edition 1. The vent has one of the highest decibel ratings on the market for a non-acoustic vent. Our aluminium vents (look for the reference VAL) have thermal seals to stop draughts when closed. 0 ventilation system to keep your home ventilated effectively and energy-efficiently. Quantity. Glazpart is proud to launch a new range of Plastic injection moulded trickle ventilators to meet the needs of today s building designers, window fabricators and installers. Through Frame Design: This is where the trickle vent it often positioned through the head of the frame. 55,000mm² equivalent area and space on the window profiles can sometimes be an issue. Trickle Vent Options. Range includes: Standard through frame. They will. Rytons Super Acoustic Controllable LookRyt AirCore is a simple and efficient answer to background ventilation. Acoustic Dn,e,w (+/-) – 2900EA version – vent open 33 (-1;0), vent closed 51 (. Glidevale ALDB Acoustic Trickle Ventilator 8000mm. Connect with us Social Media. Granada can install an acoustic trickle vent which has been specifically designed to aid air circulation whilst preventing noise waves passing through it. Sign up to our Newsletter. This also allows them to be compliant with the latest building regulation requirements. RRP from £2. • Exceptional attenuation of external noise pollution (up to 56dB), ideal for built up areas effected by traffic, railways and general noise pollution • Sonair F+ ventilates and cleans the air • Independently tested by the BRE • Air cleaning and filtration • Low energy consumptionThe complete acoustic kit (EHT + 125 mm duct + acoustic foam + acoustic canopy) can attain an acoustic attenuation of 52 dB, which places it among the best products available on the market. Read More. At the FITSHOW 2013, we launch the first of the “Link Vent” range of patent applied for trickle ventilators. The aesthetically pleasing and patented design helps to reduce the visibility of the trickle vent on a window. Acoustic through frame. The first [22], specifically addressing trickle vents, surveyed 116 sources and mentioned three experimental studies (two schools, one office). TV2000 Internal Trickle Ventilator:. Location. Whether you need white trickle vents to fit a standard 70mm PVCu profile, slimline anthracite grey trickle vents to fit on aluminium windows or. Range includes:2500EA4000EA5000EAInternal Vent Yale. Unfortunately, there’s no hiding the fact that they can look unsightly. Sometimes the best way to achieve the best acoustic performance in new build applications is to upgrade from a traditional ventilation strategy, e. Single. timber or woodaluminiumclad window systems. Renson Waves is the first fully automated local ventilation unit with a humidity, VOC and (optional) CO 2 sensor. 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. 400mm. View. Sunny Sussex. W. Generally, to gain maximum performance, the size of the acoustic attenuator should be mirrored on the vent and canopy; and. No projection when closed. Having recently moved into a new build apartment, the noise through the trickle vents in the bedroom window is driving me mad. Lockable restrictor (160mm or 270mm) VELFAC maxi-handle. 9 millimetre material. Mantis 3. 18,395. All ventilators in the range meet the requirements of Document “F” and Document “E” of the Building Regulations. Single/Multipack. Manufactured from PVC. Unfortunately, opening windows or doors can also let in unwanted noise. Contact Us. They are controllable, to give the option of having them open or closed. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories and more. Are the trickle vents available in various colours? Cover the sides and top and bottom of your air vent with acoustic foam as you go. Trickle ventilation system. They are controllable, to give the option of having them open or closed. Comes complete with Freshvent 100 db and Freshvent 100 Thermo db versions. The available models differ in acoustic insulation levels (35, 38, 40 and 42 dB). Yale Trickle Ventilators - Yale UK. Acoustic STC – TV425 Vent and Canopy – open 33dB – closed 46dB. Supply Ventilation. Ventilation helps you to protect the building fabric long-term, save energy and retain the value of your property. RRP from £15. 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. As expected, the standard vent was not very successful in keeping out noise. The self-regulating non-return valve prevents annoying chilly draughts, while the window vent itself is also designed for improved acoustic comfort. 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 and 5000mm2 EA versions available. The honeycomb grill is designed to filter out unwanted airborne debris. The EAR42W is one of the best performing acoustic window ventilators available in the UK. V. The rafter air channels will need to be able to be installed between rafters and generally need at least 16 inches. Buy As Trade Add to Basket. Up to 29 db Dne W. Our acoustic window vents range features a comprehensive selection of acoustic solutions. co. More information [email protected]. Kitchen and Bathrooms are good locations for the use of trickle vents because of the condensation problems, but. We are experts in the design, manufacture, specification and supply of residential ventilation systems. In addition, acoustic vents can also help to improve the overall acoustic quality of a room by absorbing excess sound waves. 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. RW Simon FV Acoustic Vent 400mm 2500EA . 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. 50 a set, conform to Building regulations. uk +44 (0)28 9061 6505to the body to ensure acoustic performance is achieved. The ventilator has been designed with upward air deflection to eliminate replacement air. The Simon 19000 Acoustic and Carrier Bar Option are supplied to give you the glazed-in solution for your ventilation requirements. 497mm (5000EA) 215mm (5000EA) 173. Glazpart MK2 Link Vents - Singles 454mm 5049EA. 62,Topcashback: £177. Consult manufacturer for details and insert requirements. Ducted Ventilation Powerflow models provide a compact yet versatile range designed with the installer in mind, combining the acoustic benefits of a tough plastic casing with the pressure characteristics of a centrifugal fan. Available in 2 sizes: This vent 2500EA - 250mm (L) x 25mm (H) x 70mm (D) Internal/86mm (D) External. ) and they think standard window-mounted trickle vents would act as noise pathways. V. - Enables secure, weather resistant ventilation with exclusion of insects. BIM object . Availability: Item stocked in our warehouse. Adding secondary glazing means sound must travel through another layer of glass and air space between, helping to diminish its energy and improve sound proofing. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. Learn More. Suffix product code with: Suffix product code with: 265 (white), -898 (Desert Sand), -242 (Almond. Download. Yeah, it might be the same mechanism as what they use for mufflers (in which you have a. Internal baffle reduces light and draughts. Home. 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. 4080mm² measured area 2500mm² Equivalent Area. Waves is the ideal solution if, for practical reasons, a centralised ventilation system is not possible. Glazing or infill -Standard : Glazing to BS 6206. The new acoustic vent is designed to provide both fresh air and noise control in buildings when combined with VELFAC SOUND windows. Doing this will help further reduce echo. One of the best performing acoustic window ventilators available in the UK. Zehnder Group UK. Our trickle ventilator products are available for delivery as. Additionally, they help remove stale air from the property, which is very helpful if there are any odours lingering in your home. Acoustic lining reduces sound by 38dB with internal grille fully open and 39dB when closed. Both window and wall vents are a popular. About this product. Trickle Vents by "Greenwood" we have these vents available in various colours and sizes. RW Simon are one of Europe's leading suppliers of domestic air management systems. Damp Weather Shutoff – dual control adjusts. *much* quieter than the master bed. BV, BV - TV. Performance required. There are many variables to consider in acoustic testing, please contact us for specific test figures on our range of trickle. TTF Slimline Ventilator. Trickle Ventilators Titon manufactures and supplies window and door. Fixing holes in the frame and cover caps. favorite_border. Classification Pr_30_59_94_90. VAT. Schüco decentralised ventilation systems stand out from. Window Ventilation;Configurations and results. Any cooling of the internal temperature in winter from a trickle vent is marginal. Enquire now, call 01805 623721. 47 (-1;-2) dB. The question is usually followed by a silence as the customer thinks about what they already have. Made of aluminium with ABS end caps. Trickle vents are by far the cheapest and most practical solution to achieve the regulations for both new build and replacement markets. acoustic result. test – a standard Titon slot vent and a so-called ‘acoustic’ slot vent. Lockmaster. 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. £5. Since 1936, Vent-Axia has been manufacturing a large range of efficient ventilation products helping improve indoor air quality in homes & commercial buildings. Map Vent Fixed Louvre Vent with Flyscreen White 229mm x 229mm (8886D) (58) compare. 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. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. AC2. Surface mounted noise reducing acoustic trickle vent. Hopefully the first of many more upgrades, and after seeing Thermally Broken suites specified for over 2 years, good to see the requirements finally stick on a…Secondary glazing does not need trickle vents which improves the acoustic performance. DG 1500; DG Standard;. 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. 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. New rules (after 15 June, 2022) In line with the new rules, all windows and doors must be fitted with trickle vents, unless there is an alternative, dedicated ventilation system fitted. Slimline vent design has clever two stage opening. 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. 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. Nineteen different Trickle Vents are reviewed from some of the performance aspects in this paper. Enquire now, call 01805 623721. Internal baffle reduces light and draughts. Available in 3 external cowling colours. Table 3. 250-368mm L with air brick fitted. Trickle ventilators provide ventilation to the room without the need to open the main window, reducing noise levels as a consequence. SM Ultima 5000 mm2 EA. 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. Complete with the unique Brookvent double action close position and a high performance thermal foam seal, the SM 1200 ensures the ultimate in comfort control for the end user. 5mm (5000EA) 438mm (5000EA) Illustrations show 2500EA version SF Xtra Sound Attenuator Vent Fixing and Operating Instructions BM504 Iss. As UK stockists, Window Ware are proud to stock a wide range of RW Simon trickle vents, including framevents, acoustic vents, TTF slimline, as well as their ever popular vent-a-matic circular window vent. Contact Us. Mantis 4 . Delivery. As expected, the standard vent was not very successful in keeping out noise. The concept of ‘acoustic ventilation’, and the technology behind all Silenceair® products, focuses on allowing air to freely enter and circulate in our buildings, while keeping noise out. Do you need acoustic ventilators for your windows? Check out the Simon Acoustic Range, a comprehensive catalogue of products that offer high performance, durability. With. 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. There are two width variants, one for use over a 13mm slot, the other for a 16mm slot. Place an order within 08h 51m 57s And we will send your order today. Acoustic trickle vent. Enables secure, weather resistant ventilation with exclusion of insects. The debate around trickle vents today has been as strong as ever, with questions still being asked about compliance, who is liable and help being sought from various industry bodies. ventilation (Glidevale acoustic low profile vent *TVALdB450/800) to achieve up to *40/42dB Dn,e,w sound reduction. Trickle vents for UPVC windows and doors from RW Simon . 2500EA. Passivent’s Soundscoop acoustic air transfer unit also combines crossflow ventilation with exceptional acoustic attenuation. Bulk Save - View Offer. 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. Adding an extra pane of glass with our triple glazing will only provide a small increase in sound insulation, if all three panes are of the same thickness. Glidevale ALDB Acoustic Trickle Ventilator 8000mm. Recently organised window fittings at a relatives house. Our comprehensive range of acoustic trickle window ventilation is becoming ever more popular and you can even pair up with a number of our internal Trickle Vents such as. 08 Inc. One of the major benefits is that it can be installed in the same. uk info@titon. Wasn't sure where to post this ! We moved into a new house in June2010, when it started getting colder we closed the trickle vents on all the windows but still have a draught coming through them. The ‘p’ (projection) dimension of each can vary depending on if it is open or closed. 5mm (2500EA) 215mm (5000EA) 29. Download. RW Simon Trickle Vents. D Vent. *Series 5 & 6 Requires controls kit – sold separately. These trickle vents are screwed to the frame and can be operated by simple finger control. We also offer the acoustic window trickle vent range in a selection of anodised finishes. ago. Other finishes available depending on quantity. Range includes: Standard through frame. 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. Glidevale Protect TVES4dB Acoustic Energy Saver Humidity Sensitive Trickle Vent - Trickle Vent . Dimensions. Espagnolette with lock. Size: 400mm (L) x 20mm (H) x 22mm (D) Achieves sound reduction of 40dB closed and 33dB open. -Hardware : Locking espagnolette. Q. 57 Ex. The importance of indoor air quality is becoming increasingly recognised as buildings are built to be more airtight and more energy efficient. Between the two rooms is a sound damping wall to prevent any. (54 products) An air vent is a space generally in a wall, which allows air to pass through and installing air vents helps to promote this air flow. Acoustic trickle vent. [email protected] and specify trickle vents from top manufacturers with NBS Source. VAT. Chrome plating. WHITE 400mm Trickle vents from just £3. Reduces sound by 45 dB with internal grille fully open and 50 dB when closed (Dn,e,w). Size Name: 4000EA. Brookvent™ is an award-winning manufacturer of high-performance window ventilation systems and market-leading MVHR systems. Snap on cover panel. Background ventilation can be provided by trickle. As one of the market leaders in tile ventilator manufacture in the UK, Glidevale Protect’s range has been collated for over 35 years and includes hundreds of dedicated profiled tile ventilators matching almost. ECOSlide uPVC sash windows come equipped with trickle vents as standard to meet Part F of Building Regulations. Trickle Vents BPD Store stocks Passivent’s range of window tricklevents. Improved Db reduces noise to new levels of performance, especially in the closed position. Core drilled – suitable for retrofit installations. RW Simon FV Acoustic Vent 400mm 2500EA . The Greenwood Acoustic vents provides the perfect solution, delivering an effective level of air replacement while keeping out unwanted noise. DN Vent provides 37dB acoustic attenuation and provides 1400mm2 equivalent area. Any cooling of the internal temperature in winter from a trickle vent is marginal. 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. Surface mounted noise reducing acoustic trickle vent. £395. By buying this product you can collect up to 27 loyalty points . If you already have pieces of egg crate pattern acoustic foam lying around, you can use them to plug your air vent. 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. Invisivent® EVO AK is nearly invisible from the outside due to it's. g in bedrooms, or living rooms, require 2 vents). Doormaster. Lockmaster AutoEngage. Trickle vents are activated with a single finger and provides passive. We are official stockists of Rytons Vents. Acoustic Information (31) User Guides (47) Fault Finding (13) Calculators (1) Test Results (36) URL (8) Manuals and Documentation (Obsolete) (35). Acoustic ventilation options such as acoustic trickle ventilators or MVHR which require very few. Acoustic Vents EAR42W: Fresh air in or out – no noise. More information [email protected] Greenwood Acoustic vents provides the perfect solution, delivering an effective level of air replacement while keeping out unwanted noise. 2mm if you want the exact measurement). As the name suggests, these are trickle vents with added insulation. 0800 970 4190. Acoustic trickle vent. Fixing holes in the frame and cover caps. 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. Products. Buy Now. Please make any allowances for fittings beads, gaskets etc, or for manufacturing tolerances. Acoustic vents are now available. Glidevale ALDB Acoustic Trickle Ventilator 4500mm - White. 98, Chase CB £107. Ventilators to meet or exceed the worst case requirements of BS 6375-1 for resistance to water penetration in conjunction with specified. 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. If you still think opening a window is the best way. Provides an outstanding Dn,e,w; 42dB (A) for areas with high external noise transmission. Titon is pleased to announce the promotion of Carolyn Isom to the Titon Holdings Board as Chief Financial Officer. Explore our product database and get technical information on VELFAC product ranges - including open features, accessories. Please click through our full range of window ventilation below for more information. Independently tested by Sound Research Laboratories in accordance with BSEN20140-10:1992, ISO140-10:1991. stabilised. Background - usually provided by trickle vents installed within a window frame ; Purge - either natural (by opening a door or window) or mechanical . Condensation reduction; If your home has a problem with. Available Colors: The overall vent length. Trickle Vents are designed to provide fresh air ventilation for improved in-home air quality while the window remains closed and secure. Ex. Finish (inner and outer). 3. The side-hung vents, which can reach from floor to ceiling, combine quick ventilation of rooms with a high degree of architectural design freedom. The Acoustic Energy Saver Humidity Sensitive (TVES4dB) and the Acoustic Low Profile (TVALdB450 and (TVALdB800) reduce sound travelling through the vent, whilst allowing ventilation into the property. Acoustic lining reduces. Product Description. Trickle ventilators provide ventilation to the room without the need to open the main window, reducing noise levels as a consequence. Glazpart is proud to launch a new range of plastic injection moulded trickle ventilators to meet the needs of today’s building designers, window fabricators and installers. Lockable restrictor (160mm or 270mm) Click vent. This can cause health issues through humidity, such as dust mites and mould, or even impact on the long-term. The Static Vent-A-Matic models (except PB) come equipped with an integral stormaguard as standard, to help reduce draughts. 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. Single. Ventilation systems. The EAQ42W is one of the best performing acoustic window ventilators available in the UK. Features Substantial sound reduction up to 50dB Dn,e,w. Burglar-proof performance is desired in some cases. Ventilation in windows and doors must extract excess water vapour, air pollutants and condensation. Vent-Trex is ideal for refurbishment situations where wall penetration is undesirable, as it does not damage the fabric of the building or where external aesthetics need to be preserved. 57 Ex. 96, Prolific: to 31/8/23 £663. Verified 3 months ago . Promote a healthy airflow. Stainless Steel Door Handle . 60. New higher equivalent area confirmed by the BRE. We specified a mix of double and triple glazing across the build, and also installed both standard VELFAC vents (concealed within the. Trickle vents are not required. People feel the draught and close the vent or think the room loses its heat. Inc. Classification Pr_30_59_94_90. 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. Resources. Filter Products Airflow. Schüco Ventilation Vents AWS VV are available as opaque side-hung vents with face widths of 300 mm, 250 mm and 170 mm. Acoustic FV (Framevent) Supplied with a PVCu internal flap unit and aluminium external canopy. 16 ex. Your Price Apply / Login. Cost effective sound attenuating (acoustic) trickle ventilator. Bi-Fold Door Hardware. The product is specifically designed for “Through Profile” PVC-U applications using a 10 mm routered slot, and is available in two. Ventilation building regulations have recently changed in England and Wales. Natural Ventilation.