Century System Power Pak, air-cooled, 1/3 HP, (1) 100 gph circulating pump, 120v/60/1-ph, 14.4 amps, 1.75 gallon capacity glycol bath, constant pressure expansion valve, adjustable electronic temperature control with digital readout, stainless steel cabinet, 24-1/4"W x 17-1/4"D x 25-1/2"H, R134a, cULus, NSF