{"product_id":"dayton-4hx75-damper-backdraft","title":"Dayton 4HX75 - Damper,Backdraft","description":"\u003cp\u003e15.75 In.H-W 4.5 In.L Aluminum Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2250 fpm, Overall Height 15 3\/4 in, Rough Opening Diameter 13 1\/2 in, Rough Opening Shape Square, Fits Fan Diameter 12 in, For Duct Shape Square, Free Area 0.9 sq ft, Overall Width 15 3\/4 in, Frame Material Thickness 0.1 in, Overall Length 4 1\/2 in, Connection Type Not Applicable, Frame Depth 1 5\/8 in\u003c\/p\u003e","brand":"DAYTON","offers":[{"title":"Default Title","offer_id":43255395778654,"sku":"4HX75","price":76.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z13Mvxfo5oy_d5603718-2eb3-412e-bb80-957fbafe6f8e.jpg?v=1794534157","url":"https:\/\/nationalboilersupply.com\/products\/dayton-4hx75-damper-backdraft","provider":"National Boiler Supply","version":"1.0","type":"link"}