20,000 BTU 3 speed motor with fan control switch High efficiency heating Tube and fin water coil with lifetime warranty 5-blade aluminum fan blade Rigid steel case with black texture finish Easy installation Compact design of 8-1/8″ H x 8-1/2″ W x 8-1/8″ D 5/8″ hose connections 1 year warranty on motor 12 Volt Maradyne Cab Heater. 33,000 BTU. Two-Speed Fan Control Switch Mounted on Heater. Twin motor operation 5-blade aluminum fan blade. Tube & fin water coil with Lifetime warranty 16″ W x 6 3/4″ H x 8 1/2″ D