Narrow design accommodates 12-in. (300-mm) deep cabinets. Energy efficient reciprocating compressor on N28 models. Energy efficient rotary compressor on N36 and N43 models. R407c and R134a earth-friendly refrigerants. Models for 115, 230 and 400/460 3-phase VAC power input. UL Listed to save customers time and money with agency approvals. Attractive industrial design with minimal use of visible fasteners.