WATER TO AIR HEAT EXCHAGERS BEST PRICING GO TO WWW.FREEHEAT4U.COM THEN SHOPPING CART. water to air heat exchangers are used to transfer water heat in you forced air ductwork. water to air heatexchangers take hot water through a series of copper coils and alluminum fins. your furnace fan blows through this water to air heat exchanger and super heats the air in you duct work then heats your home. in using a water to air heat exchanger it is most important that the nipple on the water to air heat exchanger that is closest to the fan is the cold water return to the outdoor wood furnace. the top nipple farthest away from the fan needs to be the hot water feed. this is improtant because as the cool air enters the air if hooked up this way then the bottom nipple will pre heat the air entering the water to air heat exchanger and as it exits the water to air heat exchanger the top nipple will super heat the air. if this is hooked up backwards the air entering the water to air heat exchanger will super heat the air and when it exits the water to air heat exchanger it will cool the air down. we hope this helps with you installation of your water to air heat exchanger.
when deciding on what size water to air heat exchanger you need measure your plenum above the air conditioning coil then buy the next size smaller of the measurement. example if your plenum measures 21x21 then buy the 20x20 water to air heat exchanger. you want to be able to slip the water to air heat exchanger inside you duct work. then you want to install a 90 deg angle piece of metal that you will screw to the inside of your duct. this shelf should be installed on both the left and the right inside of your duct. you also want to make this shelf on the back of the duct as well. when building this shelf it will hold your water to air heat exchanger in place and last you a lifetime. speaking of lifetime your water to air heat exchanger has a lifetime warranty as well and fell free to call day or night with questions