COOLING WITH HEAT PUMPS Ground-to-water heat pumps can provide efficient cooling. Because of the stable temperature below ground, even in summer, the naturally cooler water from the ground can be used to cool a space without using the refrigeration process. This is known as 'passive' cooling.

A heat pump extracts heat from the cold outside air and transfers it inside our home. To this end, a compressor inside the device uses electricity to increase the temperature of the heat extracted from the outside air. The heat pump can also provide cooling by transferring warm indoor air to the outside.

Air-to-air heat pumps transfer heat from the outside air to the air inside your home, increasing the air temperature in each room. This warm air enters your home through a series of fan coil units, or 'blowers'. Air-to-air heat pumps are sometimes referred to as air conditioning.