Building codes require outside fresh air to be supplied into a dwelling and for the sake of comfort, this air is to be tempered. HOYME Motorless Air Exchanger (HAE) does this and more. It also tempers cold air before it enters the area of the furnace fan and therefore protects furnace parts. No need for expensive electric heaters or special motors to service or wear out. With the HAE, there are no moving parts, the furnace fan does it all. Using the furnace fan also guarantees the HAE remains operational at all times.

While fresh, warm air is supplied through the Air Exchanger into the heating system, moist stale air is exhausted through a separate duct. The exchange of air, according to calculations, is approximately 100 to 120 cu. ft/minute, depending on the static pressure of the furnace fan. The area of heat transfer in the unit is over 3000 sq.in. plus another 3000 sq.in. when using at least a total of 15 ft. of concentric ducting connected to and from the unit. As a result, heat transfer proves to be very high as shown in test reports. e.q. Outside temperature of -30 C (-22F) enters the return plenum at +14 C (+57 F). This incoming air is preheated solely by the heat transfer of exhausting air and therefore receiving warm fresh air at minimum cost.