{"product_id":"majestic-outside-air-flex-duct","title":"Majestic Outside Air Flex Duct, Insulated or Uninsulated","description":"\u003cp\u003e\u003cb\u003eMajestic ID and UD flex duct carries outside combustion air to Majestic wood-burning fireplaces: ID4 and ID6 are insulated, UD4 and UD6 are uninsulated, in 4 or 6 inch inside diameter.\u003c\/b\u003e Majestic lists the flex as required, sold separately, on fireplaces such as the Biltmore, Ashland and Cottagewood, and as the duct for the optional outside air kit on the Royalton and Sovereign.\u003c\/p\u003e\n\u003ch2\u003eAt a glance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside air duct\u003c\/strong\u003e: For wood fireplaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\" or 6\" i.d.\u003c\/strong\u003e: 102 or 152 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulated or not\u003c\/strong\u003e: ID or UD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort runs best\u003c\/strong\u003e: Per Majestic's guidance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eID4\u003c\/th\u003e\n\u003ctd\u003eInsulated duct, 4 in. (102 mm) i.d.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eID6\u003c\/th\u003e\n\u003ctd\u003eInsulated duct, 6 in. (152 mm) i.d.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUD4\u003c\/th\u003e\n\u003ctd\u003eUninsulated duct, 4 in. (102 mm) i.d.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUD6\u003c\/th\u003e\n\u003ctd\u003eUninsulated duct, 6 in. (152 mm) i.d.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eListed in\u003c\/th\u003e\n\u003ctd\u003eMajestic Biltmore 36\/42, Ashland 36 (ASH36-B), Cottagewood 36\/42\/50, Royalton BE36\/BE42 and Sovereign SA36C\/SA42C manuals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003eOutside air for the fireplace\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMajestic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eUse the size your manual calls for.\u003c\/strong\u003e Check your fireplace installation manual for the duct size and type it lists, and keep the run as short as practical, as Majestic recommends for outside air kits.\u003c\/p\u003e\n\u003ch2\u003eQuestions people ask us\u003c\/h2\u003e\u003ch3\u003eInsulated or uninsulated?\u003c\/h3\u003e\u003cp\u003eMajestic lists both. Check your fireplace manual and local code for which to use where the duct passes through cold or conditioned spaces.\u003c\/p\u003e\u003ch3\u003e4 inch or 6 inch?\u003c\/h3\u003e\u003cp\u003eUse the size listed in your fireplace's installation manual. \u003ca href=\"\/pages\/contact-us\"\u003eSend us your model\u003c\/a\u003e and we will look it up.\u003c\/p\u003e\u003ch3\u003eIs outside air required?\u003c\/h3\u003e\u003cp\u003eMajestic lists the flex as \u003cb\u003erequired, sold separately\u003c\/b\u003e on models such as the Biltmore 36\/42 and Cottagewood, and the outside air kit as optional on the Royalton and Sovereign.\u003c\/p\u003e","brand":"Majestic","offers":[{"title":"Insulated \/ 4\"","offer_id":67631397273874,"sku":"ID4","price":91.0,"currency_code":"USD","in_stock":true},{"title":"Insulated \/ 6\"","offer_id":67631397306642,"sku":"ID6","price":106.0,"currency_code":"USD","in_stock":true},{"title":"Uninsulated \/ 4\"","offer_id":67631397339410,"sku":"UD4","price":58.0,"currency_code":"USD","in_stock":true},{"title":"Uninsulated \/ 6\"","offer_id":67631397372178,"sku":"UD6","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/majestic-outside-air-flex-duct-2.png?v=1792597889","url":"https:\/\/www.aquaterrabackyard.com\/products\/majestic-outside-air-flex-duct","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}