Invisco has the world's first SmartSpeed(tm) automatic speed control for whole house fans. Invisco has the ONLY infinitely variable speed fans. Whole house fan performance includes CFM capacity from 2500 up to over 15,000.
Invisco also makes commercial and industrial fans using EC motors (ECM) that operate on the 0 to 10 VDC signals from modern building control system software.
If you need...