1.Cooling, heating and domestic water heating, 3 functions in one solution. One single unit can provide one family's need for sanitary hot water, summer cooling and winter heating. 2.Smart design that adapts to all types of installation, like duct unit, universal type, floor radiation heating and radiator heating.Easy installation for all solution, no need for extra water tank. 3.Super low temperature heating Special designed for low temperature at -20 No water circulation in outdoor that avoid water freezing dangerous to whole system. 4.50% energy saving and 1/4 cost of gas heater. With recirculation heat pump technology, efficiency is extremely high.The capacity is almost 4 times than conventional boiler and gas heater. 5.Safe, healthy and non-pollution All water tanks are made of stainless steel.Special material including wate pump is carefully choosed to protect the sanitary water safe and healthy. Programed sterilization function will clean water tank automatically and provide clearn water all the time. 6. We provide 1% free spareparts with containered order and 2 years warranty of main parts for factory fault since shipment arrival. 7. After-sale service We can provide free heat pump installation consultation and technical assistant. We can help to purchase other parts related to or recommend reliable suppliers directly. 8.Package and shipping We will put products in thick cartons and polywood pallets outside to avoid any damage during shipping.It will take about a week by air, 30 days by ocean shipping.