Belfast·SPG004 Residential Extensions and Alterations·Page 58
Ground or Water Source and Air Source Heat Systems
Ground or water source heat pumps extract heat from the ground or groundwater for home heating, while air source heat pumps extract heat from the air and use a heat pump to increase its temperature for water heating or space heating.
Ground or water source and air source heat systems: ground or water source heat pumps extract heat from the ground or groundwater which can then be used as a source of heat for the home. An air source heat pump takes heat from the air and increases its temperature using a heat pump to either heat water or help heat the home.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/belfast/SPG004 Residential Extensions and Alterations.pdf