Schaefer WS-220 Aluminum Shutter 22" winch Engineered for extreme energy efficiency

Engineered for extreme energy efficiency giving you additional savings (Draws as low as 1

Optional Cool Diverter Valve for non-stop vacuuming

Schaefer MIT-2200 PVC Motorized Fan Shutter Air Intake 22 Inch

Totally enclosed high quality motor & blades deliver maximum performance and efficiency

Schaefer WS-220 Aluminum Shutter 22" winch Engineered for extreme energy efficiencySchaefer WS 220 Aluminum Shutter 22" SCHAEFER aluminum shutters allow airflow in a single direction and are used as building air inlets to feed Schaefer exhaust fans, or on exhaust fans to prevent air entry when the fan is not operating. Aluminum shutters are built tough for long life in the most demanding environments, all at an affordable price. Features Constructed of heavy duty brushed aluminum for corrosion resistance and greater durability