air proving switch for sale, brand-new and used.

ECON AIR DIRECT GAS FIRED INDUSTRIAL AIR HEATER NON-RECIRCULATING * DELIVERS TEMPERED MAKE UP AIR ROOF TOP UNIT with CONTROL BOX ****INDOOR OR OUTDOOR USE**** Model No: AA-4-ETL ~ Serial No: 13626-4 1,800 CFM Air Volume 230 Volts - 60 Hertz - 1 Phase - 10.2 Full Load Amps - 1.5 HP PRODUCT OVERVIEW: The Direct Gas Fired Make-Up Air is designed to deliver tempered make-up air for installations requiring frequent air changes. This unit is