Return Fans or Relief Fans

Are return fans necessary? Some designers cannot imagine a system of any substantial size operating without them. Others condemn them and maintain ASHRAE should advocate banning them completely. Opponents of return fans favor power exhaust (relief) fans. This article compares the two systems in terms of energy consumption and control requirements.

Citation: ASHRAE Journal, Vol. 46, No. 4, April 2004



Product Code(s): D-21371