Select an HVAC fan that is sized properly for your needs and uses efficient motors and drive systems.
For ceiling fans used in open commercial spaces look for fans that move large volumes of air.
GreenSpec lists high-volume low-speed (HVLS) fans with efficient motors that spin long blades very slowly. Once spinning, the fans use little energy to maintain momentum while circulating air very effectively.
Products in HVAC Fans
Continental Fan Manufacturing
Spruce Environmental Technologies, Inc.
American Aldes Ventilation Corp.