Features: 1. adopt imported semi-hermetic screw compressor as the mainframe, high refrigerating efficiency, less parts, reliable running. 2. fully utilize the groundwater resource.realize the cooling and heating are supplied together, and economize the primary investment and the running expenses, favorable to environmental protection. 3. the heat recycled type unit can provide high quality hot water. applicable area: the mainframe of various comfortable air conditioner and technical cold source.