The Hi-Velocity pulse width modulation (PWM) control is unique in the small duct, high velocity sector because it is a true energy-saving zoning control system, claims the company. The controller is pressure-reactive and will change the energy input to maintain constant cfm flow of open outlets from 150-1,250 cfm, eliminating the need for bypass dampers. It has three independent settings for cooling, heating, and recirculating fan, allowing for fine tuning with variable commands. The PWM unit is compatible with most forced-air zoning packages. According to the manufacturer, the control has been successfully integrated with inverter drive heat pump condensing units, providing leading-edge technology.

Energy Saving Products Ltd., 14710-112 Ave., Edmonton, AB T5M 2T9 Canada; 888-652-2219; 780-453-1932 (fax);;

eProduct 183