Osburn 6" x 25' Insulated Flex Pipe for Forced Air Kit

The 6-inch insulated flexible pipe that an Osburn forced-air kit needs and does not include — 25 feet of insulated pipe. The kit instructions require that pipe to be HVAC type complying with ULC S110 and/or UL 181, Class 0 or Class 1, and to withstand 250 °F. On the Horizon the kit connects at a 6-inch outlet on either side and can push heat to a room up to 50 feet away, so plan one length for a short run and two for a long one. Listed for the Everest III, Stratford II and Horizon wood fireplaces. $225.