The Daikin EDLA04EV3 is a 4kW/Class 4 air-to-water air source heat pump. This low temperature unit transfers heat from the outside air to water, whcih is then used to heat your indoor space vithrough radiators, convection headers or underfloor heating, and when used with a compatible hot water cylinder can also provide hot water for washing and bathing. This Monobloc all-in-one design with hydraulic components includes an WLAN cartridge. Supplied complete with a separate back up heater kit. Low impact R-32 refrigerant. 1 phase/230V power supply.