Air Source Heat Pumps
Air to Water Heat Pumps
An air to water heat pump warms water for radiators or underfloor heating and can also provide domestic hot water through a cylinder.
The heating system must be designed for the property. We check its heat loss and whether the existing radiators can provide enough warmth at the planned water temperature.
Air to Air Heat Pumps
An air to air heat pump warms rooms by circulating air through indoor units. Many systems can also provide cooling.
It does not heat the water for taps and showers, so a separate hot water system is needed. Eligible installations in homes may qualify for the Boiler Upgrade Scheme.
How Does it Work?
An air source heat pump moves heat from outside air into your heating system. It uses a circulating refrigerant, much like a fridge uses one to move heat out of its cabinet.
1. Absorb heat. Air passes over the outdoor coil. If the air is 0°C and the refrigerant is at −5°C, that 5°C temperature difference allows heat to flow into the refrigerant.
2. Raise the temperature. An electrically driven compressor increases the refrigerant’s pressure and temperature.
3. Heat the water. The hot refrigerant passes through a heat exchanger, transferring heat to the water used for heating and hot water.
4. Repeat. The refrigerant’s pressure drops, it cools, and the cycle continues.
The refrigerant does not “gain five degrees” in the example. The 5°C difference drives heat transfer; the refrigerant absorbs energy as it boils.
