1. Suitable for the place require large amount hot water 2. Utilize the work principle of heat pump, the consumption of electricity is only 1/4 of electric water heaters 3. Energy conservation, environmental protection, and safety 4. Special compressor for heat pump, durable and energy efficient. 5. Stainless steel plate heat exchanger, less flow resistance, high efficiency heat exchange. 6. Reliable defrosting technology 7. Microprocessor controlling system, prevent the problem of water mixing, make you comfort all the time 8. Multi-protecting function, ensure the stable operation. Operating temperatures: -7~43ºC Out put water temperatures: 45~60ºC Heat value: 17.2KW Rate power: 4.3KW Hot water offer: 370L/H Refrigerant: R417 or R22 available. Strong wooden case packing.