1. The unit uses the name brand compressor and the electrically controlled part processing manufacture, the necessary high quality high efficiency copper pipe manufacture condenser and the evaporator, the heat transfer effect is remarkable. 2. The unit has the contour to be artistic, the volume is small, the noise is low, the energy is big, life long, highly effective energy conservation, operation simple and so on characteristics. 3. The unit has, the forced-air cooling type, the heat recovery type three big types water-cooled, divides into the screw rod type, the vortex type two form matching different cold quantity of heat according to the compressor type to be possible to supply the choice. 4. The unit is suitable for the guesthouse, the hotel, the office building, the villa, the store, the school, the hospital, the Industrial building and so on each kind newly built and the reconstruction greatly small-scale industry and the civil construction environment air-conditioning system, but may also use in the revertex, the galvanization, the food processing, the chemical industry and so on many kinds of professions. operating region: 1. Freezing water leakage temperature range: 5~200C; 2. Cooling water leakage temperature range: 22~370C.