Air Source Heat Pumps are renewable energy systems that provide heating and hot water using free solar energy from the air. This energy is converted to a usable temperature and can then provide all heating and hot water requirements. These products are split into 2 parts, the outdoor air handling unit that can be situated up to 30m away from the property and the heat pump and water tank that are typically located in a utility room. In addition, installing one of these units means there is no need for a costly connection to the mains gas network and no unsightly oil tank or storage requirement for solid fuel. Air source heat pumps do not require any scheduled annual maintenance like conventional boilers, good quality air source heat pumps should operate for at least 20 years maintenance free.

The units are a little on the noisy side to be happily operating indoors.

The recovery rate, the time taken to replenish your hot water cylinder, is rather slow. A typical 3kW unit would take over two hours to recover, as compared with 30 minutes for a similar-sized cylinder heated by a conventional boiler.

Heat pumps lose their efficiency as external temperatures fall. In colder climates the system needs to be installed with an auxiliary source of heat to providing heat at low temperatures or if the heat pump should require repair.

Solar PST This uses a different concept to the air source heat pump - the noisy and energy consuming fan has been eliminated by pumping the refrigerant gas through special solar panels on the roof or walls. This has the advantage that more energy is collected whatever the weather, and when the sun shines there are even greater savings to be made. The Solar PST system can generate a COP of 4.5 for hot water and 6.5 for swimming pools, it also means it is quiet in operation. Small systems start with a novel hot water cylinder with the heat pump built into the side whilst larger systems can be designed to run whole houses or offices and swimming pools.
 

Key words:    Air Source Heat Pump  ,   Heat Pump

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