The Mechanics of a Motorless Air Exchanger

With Heat Recovery (HAE), connected to a Forced Air Heating System having a Furnace Circulation Fan running continually and developing one half inch of static pressure = approx. 125 CFM.

ONE CUBIC FOOT OF AIR IN = ONE CUBIC FOOT OF AIR OUT 

A bathroom exhaust fan has been added and connected to the HAE with two back draft dampers isolating the operation of either the exhaust fan or the furnace fan. 

Printer Friendly (pdf)