These two rural properties in common ownership on the same site are heated by separate heat pumps connected to a single set of boreholes. As part of an extensive refurbishment the owners wanted to replace their oil-fired boilers with a cleaner, greener alternative heating and hot water system.

A heat loss analysis established the peak heating requirements for each of the properties. A thermogeological assessment was commissioned to investigate the thermal properties of the ground underneath the house and to determine the number and depth of the boreholes that would be needed to match the annual heat load of the two properties.

We identified a drilling contractor and the first stage of the project was to drill three x 115m boreholes. We connected the completed boreholes to a 3-way buried manifold chamber with header pipes and pressure tested the connections. For the main house we installed a 12kW NIBE S1155 heat pump with a 300 litre unvented DHW storage cylinder in a corner of the kitchen and connected it to the external manifold. Space heating is distributed to underfloor heating manifolds on both the ground and the upper floor.

For the annexe we installed a 6kW NIBE S1155 heat pump with a 200 litre unvented DHW storage cylinder in a utility room. This unit is connected to the same manifold via header pipes, with balancing valves ensuring that there is sufficient flow to each heat pump.

Using the MyUplink portal the heat pumps are monitored remotely and notifications are sent directly to service support.