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heat pump solar water heater: Air souring heat pump Water heater Feature 1) Energy saving. Air sourcing heat pump water heater absorbs heat energy from the ambient air directly with average COP 3.5. It is around 70% energy saved compared with the electrical or gas heating; 2) Safety. Air sourcing heat pump water heater has a safe operation is guaranteed by the separation of water and electricity, the automatic controll, the auto-defrosting function, the pressure-resistant tank, and temperature protection functions; 3) Green operation: The refrigerants of Air sourcing heat pump water heater are environmentally friendly, and there is no poisonous gas burnt out during operation. 4) Flexibility of installation of Air sourcing heat pump water heaterMonobloc type of Air sourcing heat pump water heater The compressor, heat exchanger and water tank are combined within one case. It is easy to control and install. Capacity: 3.5kw, 4.6kw, 6.8kw, 9.5kw, 16.5kw and 21.5kw. Refirgerant: R417 or R410a.Split type of Air sourcing heat pump water heater The water tank and outdoor unit are separated. The water tank can be installed indoor, and outdoor unit connects the tank with piping. This system can save indoor space. Refrigerant: R417 or R410a. Capacity: 3.5kw, 4.6kw, 6.8kw, 9.5kw, 16.5kw and 21.5kw