Looking to add efficient heat distribution from your outdoor wood stove or boiler to your home’s ductwork? This 20x20 inch heat exchanger is built for that. It has three rows of 3/8-inch seamless copper tubes with 12 aluminum fins per inch for maximum heat transfer. The case is sturdy 306 stainless steel, and the whole unit is brazed at the edges to handle high pressure and temperature. It features four threaded (MNPT) ports for easy plumbing connections. Simply slide it into your existing plenum or duct – no extra tools needed. It works by circulating hot water from your boiler through the coil, while a blower pushes air across it, delivering warm air throughout your house. Ideal for outdoor wood furnaces, hybrid heating systems, or even dehumidification setups. Just remember to preheat with steam for about 10 minutes before starting the fan to avoid thermal shock. A durable, efficient way to upgrade your forced-air heating system.
