Heat pumps are integral to an air conditioning system, transferring heat from one environment to another via a refrigerant. Heat pumps also offer a cost-effective heating solution - and air source heat pumps are recognised as a renewable heat technology. In cooling mode, heat pumps work by transferring the heat from a room or internal space to the outside air, thus cooling the inside area. In reverse, heat pumps can extract latent heat from the outside air (even when the temperature outside is down to -20°C) and pump it inside to heat indoor spaces. Based on the parameters entered by the user, such as area(Region), Heated Surface Area (Square Meters or Square Feet), House Selection Heating System and other parameters... the system of calculation, can produce results like: Consumption of Electricity (KWh), Heat Pump Running Cost, Boiler Running Cost, Energy Saving.