{"product_id":"osburn-4-x-25-insulated-flex-pipe-for-fresh-air-intake-ac01359","title":"Osburn 4\" x 25' Insulated Flex Pipe for Fresh Air Intake","description":"\u003cp\u003eTwenty-five feet of insulated 4-inch flexible duct for the outside-air connection on an Osburn Stratford II — enough for a long run between the fireplace's 4-inch adapter and the outside wall register (the run must be at least 10 feet and no more than 30). The intake duct must be HVAC type, ULC S110 \/ UL 181 class 0 or 1, rated to 250 °F; clamp it at both ends and tape the joint airtight, and Osburn recommends an insulated run long enough to hold a P-trap loop to avoid condensation. Pair it with the 4-inch intake register with airtight damper. $200.\u003c\/p\u003e","brand":"Osburn","offers":[{"title":"Default Title","offer_id":55327779062039,"sku":"AC01359","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/7719\/4519\/files\/osburn-4x25-insulated-flex-pipe-for-fresh-air-intake-AC01359-product.png?v=1790506853","url":"https:\/\/thetorchguys.com\/products\/osburn-4-x-25-insulated-flex-pipe-for-fresh-air-intake-ac01359","provider":"The Torch Guys","version":"1.0","type":"link"}