For all heat pumps, the primary pump unit is located outside the home. The specific location will be dependant on the chosen energy source.
Some internal space is also required when looking to upgrade our heating system. This will likely include a cylinder, buffer, and hydraulic module. Ground source and water source heat pumps are often paired with our flexoTHERM internal unit.
Air source heat pumps
Air source heat pumps are the most common heat pumps in the UK. They have a great amount of flexibility for installation location and are often the easiest and quickest to install. The outdoor units can be installed on the ground, on a structurally stable balcony, or mounted on an exterior wall. Covers can also sometimes be used to disguise the outdoor units, particularly for projects and listed buildings where aesthetics are particularly important.
Ground source heat pumps
Ground source heat pumps require significantly more outdoor space, but this can be achieved either through boreholes or a ground array system. These typically offer a cleaner outdoor aesthetic than air source heat pumps. However, they can take longer to install and are only suitable for those with the required space available.
A ground array is created by burying horizontal collectors in the ground. These often require the property to have sufficient land available for installation. These collectors are installer approximately 1.2m below the surface. Borehole systems use vertically installed collectors and are typically dug around 100m deep.
The land being used for the heating collectors will also have to be accessible for the digging equipment.
Water source heat pumps
For the installation of a water source heat pump, the property ideally needs to be within 100m of a water source. Suitable water sources include lakes, rivers, ponds or streams.
The pipework required for a water source system is submerged, reducing the visual impact of the installation.
Don't forget to check if there is any planning permission required when installing a ground or water source heat pump.