How heat pumps work

Posted on 5 February 2014

A heat pump is a device whose purpose is to transfer energy gathered from an energy source to a destination called a heat sink.

Air conditioners and freezers are examples of heat pumps that we are more familiar with, however the term itself tends to be generally applied to many HVAC devices used for heating or cooling.

Let’s focus on heating functions as they seem to be the most common types of heat pumps installed for residential use.

There are a number of heat pumps available depending on the type of heat source being used.

Air source heat pumps use outside air as heat source – they extract it from the outside air and transfer this heat into inside air (air-air heat pumps). They are the most frequently installed devices and also the cheapest. Air-water heat pumps work similarly in principle, but they transfer extracted heat into a heating circuit e.g floor heating or into a domestic water tank.

Ground source heat pumps, also called geothermal heat pumps, are typically more efficient than air source heat pumps. This is due to the fact that they draw energy from the ground or groundwater which at certain depth tends to be off more or less constant temperature. This heat can be then used to heat radiators or water in your house.

Installing a typical system costs around £7,000 to £14,000 for an air source heat pumps and around £11,000 to £15,000 for a geothermal system . Running costs will vary depending on a number of factors - including the size of your home, and how well insulated it is, and what room temperatures you are aiming to achieve. The extend for savings will again depend on a number of factors such as your heat distribution system, fuel cost, your old heating system etc.

Therefore it is important to research your individual case and thoroughly discuss any concern with a specialist. At Green Solar we are always happy to help and advise on the best system for your household.

For a free non-obligation quote email us or call us on....

Green Solar World, located in Cambridge and working throughout the East of England, an MCS approved installer, an EPC registered company, a Renewable Energy Assurance member, a National Association of Professional Inspectors and Testers member.