In this HVAC training video program, Jim explains the popular PSC multiple speed motor used in HVAC/R equipment and how relays are used to control their operation. He also uses meters and graphics to ...

4-blade fans are designed to offer a good balance of airflow and quiet operation. With four blades, these fans can move air efficiently while creating less noise compared to fans with more blades.

"Member of Propeller Fan Manufacturers Association." Includes bulletins and forms. TRADE CATALOGS ON SUMMERWINTER AIR CONDITIONERS MULTISPEED CONDITIONERS BLOWER PACKAGES EXHAUST FANS WINDOW FANS ...