How McQuay MWCP 205A water-cooled package indoor air-conditioning have efficiency above 4 (e.g: 199kW-cooling operates under 47.8kW power. 199/47.8=4.16)? And Carrier Solid 50BL060 only 3.48 (196.5kW/56.4kW)!! McQuay uses hermetically sealed rotary compressor and Carrier uses semi-hermetic piston type compressor. Anyone feel somewhere wrong with the info ?? Please advise. Thanks. (GY Leong in China).

Anyone wish to share your experience in using water-cooled package?