Advantages of air source heat pump water heater 1) can be for house heating or sanitary hot water use. 2)it is safe to use: for our unit, water and electricity are seperated , avoid any accident caused from leakage of electricity and dry burning. 3) our unit itself has many automatic controls: A. High/low pressure protection and insufficient water flow protection;automatic unit on/off timer clock. B. Automatic reversing defrosting function enables, units to work reliably in hard winter. C. Unit runs automatically according to set water temperature. 3) colorful lcd display controller, convenient to operate and control. 4) qualified components:with branded panasonic/ toshiba scroll compressor, emerson expansion valve, long spiral pipe casing efficient heat exchanger, durable and low noise nylon fans. Parameter list: Rated heating capacity: 11 kw / 37543 btu Hot water supply:0.23t/h Rated heating input power: 2.34 kw Rated heating input current: 11.23 a Cop: 4.4 Power supply: 220v/50hz Niose: 50 db(a) Compressor: sanyo, copeland Refrigerant type: r417a, r407c, r410a Hot water side exchanger: efficient tube to tube heat exchanger Water flow: 1.86 m3/h Water pressure drop: 27 kpa Pipe size: 20 dn Unit dimension: w680*d635*h830mm Packing size: w890*d735*h1000mm Unit weight: 120 kg Package:qualified wooden case