{"product_id":"backdraught-shutters","title":"Elta Backdraught Shutters","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eBackdraught Shutters\u003c\/h2\u003e\n\u003cp\u003eElta backdraught shutters are a simple duct accessory designed to stop reverse airflow when the fan is off. They help prevent cold draughts entering the building and they can also reduce unwanted heat loss through the duct run. Finished in white ABS, they suit a wide range of common duct and fan sizes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSelect models are available for next day delivery.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy fit a backdraught shutter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStops backdraught:\u003c\/strong\u003e helps prevent reverse airflow through the system when airflow demand drops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports thermal retention:\u003c\/strong\u003e reduces heat loss through the duct in colder conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean finish:\u003c\/strong\u003e white ABS design that suits most internal plant areas and service spaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple size options:\u003c\/strong\u003e makes it easy to match the shutter to the fan or duct diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes and weights\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameter A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e039-SFSV-25\u003c\/td\u003e\n\u003ctd\u003e290mm\u003c\/td\u003e\n\u003ctd\u003e0.25kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e039-SFSV-31\/35\u003c\/td\u003e\n\u003ctd\u003e382mm\u003c\/td\u003e\n\u003ctd\u003e0.28kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e039-SFSV-40\/45\u003c\/td\u003e\n\u003ctd\u003e482mm\u003c\/td\u003e\n\u003ctd\u003e0.52kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e039-SFSV-50\/56\u003c\/td\u003e\n\u003ctd\u003e598mm\u003c\/td\u003e\n\u003ctd\u003e0.70kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e039-SFSV-63\/71\u003c\/td\u003e\n\u003ctd\u003e744mm\u003c\/td\u003e\n\u003ctd\u003e1.03kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e039-SFSV-80\u003c\/td\u003e\n\u003ctd\u003e844mm\u003c\/td\u003e\n\u003ctd\u003e1.62kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation and specification notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e white ABS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory fitted option:\u003c\/strong\u003e available on request for suitable applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelection:\u003c\/strong\u003e match the shutter option to your fan or duct size and confirm clearance using the diameter table\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSelection tip\u003c\/h3\u003e\n\u003cp\u003eIf you are ordering alongside a fan, use the fan size as your starting point then select the matching shutter code. If you are replacing an existing shutter, match the product code first then verify diameter A for fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-description\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/download-datasheets-banner.png?v=1760521797\"\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.4379%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/Backdraught-Shutters.pdf?v=1770628599\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/pdf-download-icon.png?v=1760521798\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4151\/5237\/files\/Acoustic_Mat_1.pdf?v=1709633062\" title=\"ODE Starflex Loft Roll (100mm \u0026amp; 200mm)\"\u003e\u003c\/a\u003e\u003ca title=\"Lunaflex Ductwrap Data Sheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4151\/5237\/files\/epd-certificate-glasswool-44_1.pdf?v=1709632546\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4151\/5237\/files\/ODE_Duct-wrap_Datasheet.pdf?v=1709630634\" rel=\"noopener\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 78.1023%;\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong data-start=\"3026\" data-end=\"3077\"\u003eProduct Data, Performance \u0026amp; Dimension Sheet\u003c\/strong\u003e\u003cbr data-start=\"3077\" data-end=\"3080\"\u003eProduct codes, diameter table and weights for Elta backdraught shutters, including size options to match common fan and duct diameters. Click here to download the backdraught shutters data sheet. \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/Backdraught-Shutters.pdf?v=1770628599\"\u003e\u003cstrong\u003eClick here to download the full data, performance and dimension sheet.\u003c\/strong\u003e\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eLooking to specify or purchase?\u003c\/strong\u003e \u003ca href=\"https:\/\/buyventilation.co.uk\/collections\/heat-recovery-units\"\u003e\u003cstrong\u003eExplore our full range of heat recovery ventilation units\u003c\/strong\u003e\u003c\/a\u003e or contact Buy Ventilation for expert guidance on selecting the right system for your project.\u003c\/p\u003e\n\u003cp\u003e\u003c!-- Sources: :contentReference[oaicite:0]{index=0} --\u003e\u003c\/p\u003e","brand":"BuyVentilation","offers":[{"title":"039-SFSV-25","offer_id":56319844680066,"sku":null,"price":85.0,"currency_code":"GBP","in_stock":true},{"title":"039-SFSV-31\/35","offer_id":56462126907778,"sku":null,"price":113.05,"currency_code":"GBP","in_stock":true},{"title":"039-SFSV-40\/45","offer_id":56462126940546,"sku":null,"price":127.5,"currency_code":"GBP","in_stock":true},{"title":"039-SFSV-50\/56","offer_id":56462126973314,"sku":null,"price":151.3,"currency_code":"GBP","in_stock":true},{"title":"039-SFSV-63\/71","offer_id":56462127006082,"sku":null,"price":199.75,"currency_code":"GBP","in_stock":true},{"title":"039-SFSV-80","offer_id":56462127038850,"sku":null,"price":276.25,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/backdraught_shutters_01.png?v=1770384790","url":"https:\/\/buyventilation.co.uk\/products\/backdraught-shutters","provider":"Buy Ventilation","version":"1.0","type":"link"}