Titon trickle vent. Unfortunately, relying on window night vent positions does not enable someone to live in or leave a property secure, and can in fact be a magnet for burglars. Titon trickle vent

 
Unfortunately, relying on window night vent positions does not enable someone to live in or leave a property secure, and can in fact be a magnet for burglarsTiton trickle vent  *

IN STOCK! Our popular Trimvent® Select Xtra trickle vent ranges are available NOW and SF Xtra on short lead times. Gas Regulations ventilator can provide a Free Area of up to 5000mm2 permanent ventilation when fitted with a Gas Regulations canopy. 25 Inc Vat. Trickle Vents by "Titon" we have these vents available in various colours and sizes. £499. Manufactured by Titon whose ventilators have been specified and fitted on millions of windows throughout the UK and Europe over the past 20 years, you can trust that these vents will perform and provide optimum airflow to your home. All products are suitable for use on. Buy online & collect in. Sales and Technical Support +44 (0) 1206 713801 43 Details Ventilators Vent supplied with unrestricted Equivalent Area over length. Gas Regulations ventilator can provide a Free Area of up to. 01206 814879. External cowl reduces light and draughts. co. TV90HL White Aluminium Vent 2500EA 300mm. The rights in the design, pictures. Titon Inc. Size 192 x 17mm Suit 13mm Slot Push Fit A window vent grille is a thin plastic strip that is used to cover the exterior slot parallel to the trickle vent and provide resistance from water and insects etc. View Range New: Euro hardware range From window handles to locking and. 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. Resources. Titon +44 (0) 1206 713800 Trimvent® Select Xtra S16 Surface mounted slot ventilator For use on PVCu or timber windows Features and Benefits • Revised design to improveAll 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. Surface mounted noise reducing acoustic trickle vent. The vent on the inside regulates the amount of air, the canopy or hood on the outside protects against bad. £533. | Titon manufactures and supplies ventilation and window and door hardware products – ranging from its signature Trimvent background ventilator to window handles, locking systems and hinge systems to powered ventilation products including. 5 3003 XS13 4400EA Vent Screw Fix TS1134470 411 18. Our extensive range and comprehensive support will provide you with a solution for any housing project. £1339. Titon Inc. It was founded in 1972 by John Anderson, its current Deputy Chairman, and is based in Colchester, Essex. Optimum performance over length requires fewer vents to be fitted to achieve total requirement. It can be fitted. Metal Trickle Vents: Offer the Premium Vent Choice: The benefits of metal trickle vents are clear - they offer a more durable and reliable solution with better weathering and acoustic properties. Trickle vents built into frame of bi-fold doors – Image courtesy of aspirebifolds. Performance required. The Hi Lift design improves the Trimvent range to offer increased ventilation. Supplied with appropriate screws for fixing to uPVC windows but can also be. Titon has updated its range of trickle ventilators to include additional versions which comply with the recently revised Scottish Technical Standards – the equivalent of the England & Wales Building Regulations. Tel: +44 (0) 1206 713800 +44 (0) 1206 543126 Web: Dimensions Overall Length Equivalent Area (EA) - Screw Fix** Free Area (Screw Fix) XR16 351 4600mm2 4523mm2 4990mm2 XC16 364 Instructions Other Details. Combinations can be chosen. The Scottish Technical Standards were amended in 2016 to alter the method of measuring background ventilation from the traditional ‘Free Area’. The SF Xtra Sound Attenuator ventilator is a slot ventilator which provides high levels of sound attenuation compared to similar ‘acoustic’ products, in a compact size. 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. If vent supplied with protective cover tape, do not remove tape until authorised. It provides an Equivalent Area (EA) of 2000mm 2 or. It is the shortest vent available to give maximum airflow. There are 11 products. uk info@titon. Add to Cart. Titon Trimvent Select XC16 Canopy 364 x 22mm - Various Finishes. £2. 3. 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. £1509. 32 Free Delivery View our complete range of trickle ventilators suitable for use on aluminum, wood, vinyl and fiberglass. Requires canopy. quoted sound reduction level for a trickle ventilator isn’t measured in the same way as a window. Titon manufactures and supplies ventilation and. 7. Trimvent Select E18 is a semi-recessed plastic slot ventilator that fits over a 3⁄4” slot in the window to provide a much healthier indoor air environment in the home and give the home occupants greater comfort and control in doing so. External cowl reduces light and draughts. Product Code: 12572. W. S13 2000EA Vent Clip Fix* TS1132051 265 18. 90, Haggling: £45, Wombling (Roadkill): £4. Available in white or brown. Trimvent vents all give optimum airflow. Available in white or brown UV stabilised ABS for long, maintenance free use. Making a Difference in Indoor Air Quality Titon Inc was established in 1989 to bring the concept of the integrated window ventilator also known as the trickle ventilator to the American market. Available in white or brown UV stabilised ABS for long, maintenance free use. Delivery. 08 Inc. 52 inc. g. Canopy with mesh or grille protects against the ingress of rain and insects. 5mm x 13mm. Developed to provide optimum airflow for every window application and material to. co. Case Study: Titon’s SF Xtra Sound Attenuator Acoustic Vents have been installed in the historic St Mary’s Hospital commercial redevelopment in Bristol. Changes in customer demand. titoninc@titon. Compare Similar Products to Titon GS13 Plastic Grill | Cover For Window Trickle Vents Sponsored (White, 288mm) Aluminium Window Grill £4. 67. HRV4 Q Plus. Titon trickle ventilators are effective in single family dwellings as well as high rise commercial structures such as apartments,. Trickle vents built into frame of bi-fold doors – Image courtesy of aspirebifolds. Tools and Products Needed to Fit Trickle Vents. Highly versatile compact unit. Titon, a leading manufacturer and supplier of ventilation systems and window and door hardware, has…. 8. Tel: +44 (0) 1206 713800 Fax: +44 (0) 1206 543126 Web: 1. It is the shortest vent available to provide 5000mm² EA. 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. September 2017. Read Story. 8 Sales and Technical Support 574 271 9699 Trimvent Supervent Trickle ventilation system Trimvent® Supervent Ventilator Features and Benefits ÒÒOriginal and successful Trimvent design ÒÒLarge air opening ÒÒCan replace small opening window in curtain walling systems ÒÒSightless from exterior ÒÒUsed in hotels and casinos all. Aluminium Trickle Vents; Shop all Aluminium Trickle Vents. £10. The SF Xtra Sound Attenuator can be purchased in a number of combinations based on different sizes of inner (ventilator) and outer (canopy). 0800 970 4190. Technical Information. 92 to £10. The vent is also available in made-to. Titon manufactures and supplies ventilation and window products – ranging from its signature Trimvent background ventilator to window handles, locking systems and hinge systems to powered ventilation products including whole house systems and extract fans. Availability: Item stocked in our warehouse. 91. A surface mounted aluminium slot ventilator. Titon’s ventilation range includes full whole house systems, which have come to the fore due to the emphasis on improved energy efficiency, as well as trickle vents and window opening systems. The Trimvent® Select Xtra S13 is an externally mounted plastic ventilator designed to fit neatly over a 13mm slot in a window, offering an Equivalent Area (EA) ranging from 2000mm² to 4400mm². England - Revised Approved Document F publication issued December 2021 with effective date 15th June 2022 What are the changes for background ventilators? (e. Get it Friday, 23 Jun. Optimum performance over length requires fewer vents to be fitted to achieve total requirement. EN (US) EN (UK) Reset; Search;. • Exceptional attenuation of external noise pollution (up to 56dB), ideal for built up areas effected by traffic,. Trimvent XR16 model window vent with a rating of 4600 EA (Equivalent Area). co. Trimvent SM vent is a surface mounted aluminium slot ventilator that fits over a 10mm or 12mm slot in a window and provides an Equivalent Area (EA) of up to 5000mm² when fitted with an SM canopy. Fire Safety. The Titon Slot Vent 4000mm&sup2; is designed with a night. VAT) Order Quantity. Canopy overall length: 400mm x 20mm. Inc. Group Code: GR394. PAGE 1 OF 2. Titon Trimvent Select XS13 Trickle Vent - White. White Titon Trickle Vent Trimvent Select Xtra S13 2000EA and XS13 4400EA For UPVC & Timber Windows. Titon Trickle Vent Trimvent S13 2700EA Titon trickle vents are one of our most popular and reliable vents; each set comes complete with inside and outside canopy, screws and matching cover caps. £9. Full Ducting Range – 220x90mm Rectangular. Our easy to fit white Titon trickle vents can be fitted to windows or doors (Upvc or timber), as an aid to controlling condensation. com titon. Group Code:. When used correctly, trickle vents do not contribute excessively to heat loss. Canopy For Titon Trimvent 90 Tricklevent. Titon Hardware Ltd. I’m looking to remove the trickle vents on my interior window frame. VAT. Aluminium or PVCu models are available which offer increased ventilation that other ventilator manufacturers cannot match. Independently tested to BS EN 13141-1:2004. 894 The Crescent, Colchester CO4 9YQ United Kingdom. It provides an Equivalent Area (EA) of 2000mm 2 or 4400mm 2 and can be fitted with a C13 Canopy or a GS13 Grille. Titon's range of acoustic ventilation products, from basic acoustic slot vents, through dedicated acoustic trickle vents, to sound attenuating mechanical products and ducting. £3. The TV SM is available in made to measure sizes or in bar length in a variety of colors. co. 574 271 9699. Ideal for night ventilation, does not compromise security. 90 (£14. 894 The Crescent, Colchester CO4 9YQ United Kingdom. co. VAT. One of the key benefits of the Titon metal trickle vent range is their durability – they are much less prone to abuse or over-use. 71 to £10. The Titon Trimvent Select XC13 Canopy is fitted to the exterior side of a window and allows for optimum airflow when used in conjunction with the Titon Trimvent Select XS13 Trickle Vent. Surface mounted vinyl slot ventilator. The Titon Slot Vent 4000mm&sup2; is designed with a night. 12,171 sold. shopping_cart Basket (0) Trickle Vents Chlo Products Vents Easy Vent Delta Vents Titon Reson Window Vents Greenwood Window Vent Templates RW simon Mighton Window Vents. uk [email protected] inc. £499. SF Xtra Sound Attenuator vents, University of Strathclyde. £3. Aluminum canopy. The high-lift design is based on previous models, but is revised and improved and therefore up to. Screw fix or clip fix versions (GS13 clip fix only). 748 inch) -White. Choice of external C13 canopy or GS13 grill. It is designed to be surface mounted and fits over a maximum ⅝” width slot in the window, providing a Free Air Area. titoninc@titon. Titon has maintained its position as the industry leader through constant research and product development, ensuring the company is. Titon Appliances, Electrical, and Electronics Manufacturing Colchester, Essex 2,559 followers Manufacturer and supplier of Mechanical Ventilation systems (MVHR, MEV), trickle vents and window. Titon Hardware Ltd. For 45 years, Titon says its core product has been the window trickle (or ‘background’) ventilator, claiming to be the biggest manufacturer and supplier of these products in the UK. Slot Size: 173. Our elegantly crafted trickle vents for casement windows come in a range of sizes, styles and colour options meaning there is something to suit every form of window. Not available for Trimvent Select clip fix ventilators. £4. VAT) Buy As Trade Add to Basket. Commenting on the new product, Lee Caulfield, Sales Director of Titon’s Ventilation Systems Division, said:. Show. Making a Difference in Indoor Air Quality Titon Inc was established in 1989 to bring the concept of the integrated window ventilator also known as the trickle ventilator to the American market. Titon: Titon: Name of Patent: Ventilation Device: Slot Ventilator: Slot ventilator mounted on a window or door to be. Titon has launched a surface-mounted noise-reducing trickle ventilator that is suitable for PVCu, timber and aluminium windows. Titon trickle ventilators are effective for improving indoor air quality (IAQ) in single family dwellings as well as high rise commercial structures such as apartments, condominiums and […]The Titon XR16 Trickle Vent is a flush-fit, recessed trickle vent with a sleek design and easy operation. co. £5. co. Sold as an internal trickle air vent cover only. TITON Trimvent Select S13 Ventilator. Trimvent Select Xtra S16 is a surface mounted plastic slot ventilator that fits over a 16mm slot in a window and provides an Equivalent Area (EA) of 4600mm² when fitted with the XC16 canopy. VAT. uk. Take your drill and 8-10mm drill bit and proceed to drill a series of holes across the line. Cowled Super Acoustic Controllable LookRyt® AirCore® (Up to 50 dB Dn,e,w) Controllable air vent for background room ventilation. View our complete range of trickle ventilators suitable for use on aluminum, wood, vinyl and fiberglass. Resources. . Designed to be either surface mounted or recessed finish has rounded ends and a tilting t-bar for air deflection control. It provides an Equivalent Area (EA) of 2000mm 2 or 4400mm 2 and can be fitted with a C13 Canopy or a GS13 Grille. com TV Select S13 & TV Select Xtra XS13/XS16/XR16 Plastic slot ventilators Ò Suitable for PVCu, timber or aluminium windows - (XR16 timber only) Ò Available in competitively sized EA rated combinations for optimum compliance with Building Regulations and Technical Standards on VentilationThe home of domestic ventilation systems and window & door hardware. Trickle vents, also known as perma-vents, plastic vents, trickle ventilators, window vents, and window ventilators for windows and doors. 10 inc. A surface mounted plastic slot ventilator, the Titon Select S13 Plastic Trickle Vent is ideal for new-builds or to be retro-fitted. 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. Titon Trickle Vent Trimvent S13 2700EA Titon trickle vents are one of our most popular and reliable vents; each set comes complete with inside and outside canopy, screws and matching cover caps. Prepare slots and pre-drill fixing holes. View All Trickle Vents Slimline window vent for more replacement possibilities!&nbsp; Trickle vent in a 411mm length with two fixings at 387mm. Titon trickle vents are one of our most popular and reliable vents; each set comes complete with inside and outside canopy, screws and matching cover caps. switched off provides background trickle ventilation which includes a controllable shutter. Titon Select S13 Plastic Trickle Vent From £4. Acoustic Test Report. Titon Appliances, Electrical, and Electronics Manufacturing Colchester, Essex 2,559 followers Manufacturer and supplier of Mechanical Ventilation systems (MVHR, MEV), trickle vents and window. co. • For use in conjunction with Titon trickle vents • Available in volt free and switch live inputs • Quick and easy commissioning • Demand control ventilation ready • Wide duty range • Can be mounted on any plane • 3 year warranty (UK only) • Quiet running, only 11dB(A) at 3m, low speed • Airflow up to 22 l/s • Specific fan. The Titon Trimvent Hi Lift is an aluminium slot ventilator that fits over a 13mm slot in a window. This super acoustic ventilator can provide soundproofing up to 50 dB (Dn,e,w) and up to 8500mm² EA. VAT. Our elegantly crafted trickle vents for casement windows come in a range of sizes, styles and colour options meaning there is something to suit every form of window. 18 (£2. Titon Trimvent 90 Hi Lift Canopy (263mm) - Black. View. It is the shortest vent available to give maximum airflow. Hit & Miss: 271mm L x 95mm H. A robust smooth slim elegant rounded design. 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. The building had been vacant for a number of years before the project to transform the space into 153 premium student rooms got the go. VAT) As low as: £10. 2 Sales and Technical Support 574 271 9699 Trimvent ® 90 Aluminum slot ventilator Trimvent® 90 Ventilator Trimvent® Canopy Features and Benefits ÒÒThe original Trimvent design ÒÒT-bar deflects air up and down ÒÒAluminum ventilator, canopy and grill ÒÒCan be fitted horizontally or vertically ÒÒFor use on 5/8” slot Vent-Trex Pre2021. 0800 970 4190. Do not block ventilator or external canopy/grille. Metal Trickle Vents: Offer the Premium Vent Choice. Multiple louvered grills can be joined together to make a longer canopy with greater air opening. Sales and Technical Support +44 (0) 1206 713801 enquries@titon. 28 inc. Available in white or brown. Specification. A trickle ventilator (or a passive air inlet) is a small, operable device that is incorporated into a window or door to allow fresh air to “trickle” into the home. Support. Tested in accordance with BS:EN 13141. 75 7. 0800 970 4190. 98, Chase CB £107. NEWS: Leading window and door hardware manufacturer, Titon, has recently announced the addition of the highly acclaimed Roto AL Designo product to its extensive range. Ventilation Systems Sales. co. 92 +£6. 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. Air vents are usually installed within a wall to allow air to pass through, designed to promote air flow and improve ventilation. A surface mounted plastic slot ventilator, the Titon XS16 Plastic Trickle Vent is ideal for new-builds or to be retro-fitted. Buy window trickle vents, grilles and canopies at Construction Supplies, ensuring ideal window ventilation is provided to your property. The Hi-Lift design improves the Trimvent range to offer increased ventilation. Figure 1: Extreme example of the consequences of poor ventilation in frst-floor bedroom when room was closed up for 12 weeks during ground-floor building works in winter 2021-22. £399. £736. This will prevent problems with condensation and damp. This web site is owned and operated by Titon Hardware Limited. Titon Trimvent Select XR16 Vent, 351 x 22mm, plastic - For use on Timber PVCu or aluminium windows - Airflow 4000mm2. Technical Information. Extremely low Specific Fan Power; down to 0. Each Vent Provides 2000mm2 of free area ventilation when Installed in the window / door frame, head, add-on or sash. co. Compare Similar Products to Titon GS13 Plastic Grill | Cover For Window Trickle Vents Sponsored (White, 288mm) Aluminium Window Grill £4. 11 Free Delivery Sponsored Premium Trickle Slot Vent for uPVC Double Glazing Window Reduces Condensation Brown 300mm £14. Close Ventilator by pressing vent at both endsSkip to content. This plastic slot. The XR16 is ideal for both new build or refurbished situations using timber windows and is available in a variety of colours. Titon Trimvent Select XR16 Vent, 351 x 22mm, plastic - For use on Timber PVCu or aluminium windows - Airflow 4000mm2. The TV90 Hi Lift is ideal for both new build or refurbished situations using any window material and is also available matched to white RAL 9010 and Brown RAL 8017. Resources. Inc. 6) Pan head or equivalent. 574 271 9699. Window Vents. The design is based on the Titon Select range, but is revised and is therefore up to 60% more efficient. RW Simon Ltd has an extensive range of Trickle Vents ranging in all different sizes to help achieve the amount of. 8) Round Head or equivalent Operation: Open Vent at either end by levering open under end cap along flap. Quick Overview. Face Fix Dimensions 22mm x 364mm Projection 32. Spanners and Sockets. This vent is capable of provding an Equivalent Area (EA) of 4600mm 2 when fitted with the XC16 Canopy. 70 m above floor level) to control air movement (draughts) in habitable rooms. Resources. Titon's range of acoustic ventilation products, from basic. Titon TV90 High Lift Vent (semi-recessed). Use with Trimvent 90 Hi Lift trickle vents (sold separately) Suitable for. Quantity. Titon Hardware Ltd. Titon Inc. Titon - GS13 Plastic Grille - Various Finishes. Supply Ventilation. Accepts 125mm diameter ducting, no adaptors required. Titon operates a policy of continuous improvement and reserves the right to supply products that may differ from those illustrated and described in this publication. 33, Chase roundup interest 65p, WeBuyBooks:£8. Buy As Trade Add to Basket. International House, Peartree Road, Stanway,. Tested in accordance withTiton Trickle Slot Window Vent for uPVC Double Glazing Reduces Condensation. Or fastest delivery Wed, 9 Aug. Home > About Us. The design is based on the Titon Select range, but is revised and is therefore up to 60% more efficient. Titon Trickle Vent Trimvent S13 2700EA Titon trickle vents are one of our most popular and reliable vents; each set comes complete with inside and outside canopy, screws and matching cover caps. (5)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. Titon trickle ventilators are effective for improving indoor air quality (IAQ) in single family dwellings as well as high rise commercial structures such as apartments. This product is equally suitable for. Trimvent Select Xtra XS16. Easy to install and available in 3 colours. The Trimvent Supervent is a solution that can be easily be incorporated into your system design that works at all levels. Used on windows with head drip. £34. Continuous Mechanical Ventilation (MEV) Extract Ventilation. 47. 14 inc. In Stock. EN (US) EN (UK) Reset; Search;. Condensation, carbon monoxide, and carbon dioxide. +. Titon Inc | 226 followers on LinkedIn. • Fits all Timber / Upvc / Aluminium windows. The Titon XR16 Trickle Vent is a flush-fit, recessed trickle vent with a sleek design and easy operation. Greenwood UPVC Trickle Slot Vent 2500EA 250mm Long White. 96, Prolific: to 31/8/23 £663. Value for money 'V' grille. 5 - 30 20 - 27 4400 4285 XC13 412 Canopy Screw Fix TS2134040 411 18 32. SF vents are compatible with standard 13 mm slots and are described as providing excellent sound attenuation for their size and very competitively priced. Cost effective sound attenuating (acoustic) trickle ventilator. Optimum performance over length requires fewer vents to be fitted to achieve total requirement. Positive open and close action. Metal trickle vents have become increasingly popular among house owners and tenants due to their unparalleled benefits compared to traditional plastic vents. Maxiglaze is an energy efficient glazed-in aluminum ventilator that provides a much healthier indoor air environment in the home and give the home occupants greater comfort and control in doing so. Trimvent 90 Hi-Lift Trickle Vent is a semi-recessed aluminium slot ventilator that fits over a 16mm slot in a window and provides an Equivalent Area Airflow of up to 4300mm² when fitted with the Trimvent 90 Hi-Flow canopy. Manufactured by Titon whose ventilators have been specified and fitted on millions of windows throughout the UK and Europe over the past 20 years, you can trust that these. The SF Xtra Sound Attenuator comes fitted with a Titon SF Xtra Ventilator and/or SF Canopy and fits over the standard SFX, Trimvent SM, SW and Select or Select Xtra slot size. Trimvent 4000 Hi Lift is an aluminium slot ventilator that fits over a 13mm slot in a window and provides an Equivalent Area (EA) of up to 6000mm² when fitted with the Hi Flow canopy. 8 3 40m3/h <15. £7. titoninc@titon. Quick Overview. Est. • Simple, low-cost installation requiring a maximum of only 2 hidden screws. sales@titon. Deflects air up/down or both. Titon trickle ventilators are effective in single family dwellings as well as high rise commercial structures such as apartments,. * Keep vent open as much as possible for a healthy indoor environment * Maintenance: 1. Highly efficient heat exchanger; up to 88%. 62 inc. Description. Starting at: £2. The question is usually followed by a silence as the customer thinks about what they already have. The Hi-Lift design improves the Trimvent range to offer increased ventilation. Trickle Vents allow you to have a small aperture in a window for a controlled amount of ventilation. Surface mounted noise reducing acoustic trickle vent. * Provides an Equivalent Area (EA) of 2700mm sq. Similar Products. 5000mm2 EA & 2960mm2 EA Airflow sizes. This plastic slot. In stock 932 Items. Titon SF Xtra Flat Fit Vent (surface mounted). With adjustable continuous and boost speed settings available, the Titon. £882 FREE Delivery Other Sellers on AmazonA surface mounted plastic slot ventilator, the Titon Select S13 Plastic Trickle Vent is ideal for new-builds or to be retro-fitted. Contact Us. September 2017. Sales and Technical Support 574 271 9699 13 Details Ventilators Product Product. [email protected] Vents allow you to have a small aperture in a window for a controlled amount of ventilation. If more than one vent is required, the attenuation level becomes progressively worse.