HY-C MH-6 Magic Heat Top Crimp Heat Reclaimer For Use with Oil/Coal Appliances, UL Listed, Fits 6" Single Wall Chimney Pipe Only UL listed heat reclaimer on the market. Reclaims up to 30% of otherwise lost heat going up your chimney and distributes it into your home. Crimp up configuration is designed for use with oil or coal burning heating applications with inside flue temperatures exceeding 350 degrees and surface temperatures of the single wall pipe below the Magic Heat exceeding 280 degrees. Easy to install. Fits 6" flue diameter. Built in soot scraper cleans tubes internally allowing for maximum heat transfer. Plugs into any standard 110V household outlet. Removable back allows for easy maintenance. Designed for use with single wall connector pipe. Toggle switch allows the 225 CFM fan to operate in two modes, either run continuously or thermostat control mode. Made in the USA. One Year Limited Warranty. <span class="a-text-bold">Magic Heats</span> ten heat transfer tubes maximize the surface area required to effectively exchange heat. The built in soot scraper cleans tubes internally allowing for maximum heat transfer. <span class="a-text-bold">Magic Heat</span> is the only UL-listed heat reclaimer on the market because it does not reduce the flue diameter. The open inner casing design allows hot flue gases to travel upward without restriction. Easy to service with removable back. Theres no need to dismantle the <span class="a-text-bold">Magic Heat</span> in order to service or clean it.