{"product_id":"dayton-4fzh6-20-in-23-h-w-6-5-l-extrd-alu-backdraft-dampr-20-1-2-in-x-20-1-2-in-aluminum","title":"Dayton 4FZH6 - 20 in 23\"H-W 6.5\"L Extrd Alu Backdraft Dampr, 20-1\/2 in x 20-1\/2 in, Aluminum","description":"\u003cp\u003e23 In.H-W 6.5 In.L Extrd Alu Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 3250 fpm, Overall Height 23 in, Rough Opening Diameter 20 1\/2 in, Rough Opening Shape Square, Fits Fan Diameter 20 in, For Duct Shape Not Applicable, Free Area 2.4 sq ft, Overall Width 23 in, Frame Material Thickness 0.8 in, Overall Length 6 1\/2 in, Connection Type Not Applicable, Frame Depth 3 in\u003c\/p\u003e","brand":"DAYTON","offers":[{"title":"Default Title","offer_id":43258166804574,"sku":"4FZH6","price":162.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Z11O30fo5oy_7e0f5cc1-58d8-42b4-bcb7-846210a1c63e.jpg?v=1788417110","url":"https:\/\/nationalboilersupply.com\/products\/dayton-4fzh6-20-in-23-h-w-6-5-l-extrd-alu-backdraft-dampr-20-1-2-in-x-20-1-2-in-aluminum","provider":"National Boiler Supply","version":"1.0","type":"link"}