• wall mounted air source heat pump
  • 3kw Solar panel system on the roof of a bungalow
  • 4kw Solar panel system on the roof of a house
  • Commercial solar panels on a ground frame

Heat Pumps.

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In the same way that a fridge uses a refrigerant gas to extract heat from the inside, keeping your food cool, an air source heat pump extracts heat from the outside air, and uses it to warm your home and sometimes your hot water too. An air-source system has three main parts:

The Working Components of Heat Pumps Are.

  • The evaporator coil absorbs heat from the outside air
  • The compressor pumps the refrigerant through the pump and compresses the gaseous refrigerant to the temperature needed for the energy distribution circuit
  • The heatexchanger transfers the energy from the refrigerant to air or water

Solar heat exchanger used in thermal hot water generation systems

Locating Heatpumps

Typically the first two parts of the water pump system are situated outside of your house, and the final part, the heat exchanger is fitted inside your home.

In an air-to-water heatpump system, the energy produced is used to warm water, which can be used to preheat water in a storage tank or circulate through underfloor heating or radiators. Heatpumps produce hot water that is a lower temperature (typically 35-45C) than standard boiler systems, which makes the choice of underfloor heating the most effective option. In an air-to-air system, this energy is used to produce warm air, which is circulated by fans to warm a building directly.

Heat Pump System

Air source heat pump system diagram

The efficiency of air source systems is measured by a coefficient of performance (CoP).

CoPs for air source systems are comparable with ground-source heatpumps, and generally range between 3 and 4. This means that for every unit of electricity used to power the pump, 3-4 units of energy are produced, making it an efficient way of heating a building.

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