This section provides self-builders with a ground source heat pump design with schematic drawings, ground source heat pump installation costs and a real-life case study and ground source heat pump reviews to showcase how a single ground source heat pump system fed by slinkies can provide heating and hot water to a single property.

For more information, call sales on 0845 680 4328.

Example: Schematic

For illustrative purposes only

Example: Project & Finances

Based on the above schematic, Kensa has calculated example costs below to illustrate the upfront finance required and the expected running costs and income generated via the Domestic Renewable Heat Incentive (RHI) over a 7 year period, compared to an LPG system. For a bespoke quote please click here.

Heat Pump Specification

System architectureSingle heat pump
Heat pump capacity13kW
Equipment type13kW Evo
Design conditions0/40°C
Potable DHW temp60°C
Intregral immersion heatersNo (DNO friendly)
Ground array typeSlinkies
Slinkies requiredx4
Land area required1000sq/m


Total Project Costs, Savings & Returns vs LPG

 Kensa Ground Source Heat Pump & Ground ArrayLPG Boiler
Lifetime Expectancy: ApplianceUp to 20 yearsUp to 10 years
Lifetime Expectancy: InfrastructureUp to 100 yearsTBC
Carbon Saved (over 20 years)28 tonnes0 tonnes
Appliance & Infrastructure Cost*£14K to £17.5K£1.5K
Running Costs (over 20 years)**£9K to £11K£14K to £16K
Servicing Costs (over 20 years)***£0K£700
Domestic RHI Income (over 7 years)****£24K to £28KNot eligible
Net Cost (after 20 years)*****£500 to £1K£16.2K to £18.2K
*Costs are for the supply and installation of the Kensa heat pump and ground array only, and the supply and installation of the LPG boiler equipment only. Costs for supply and installation of internals such as radiators, underfloor and heating controls are not included, please speak to your plumbing contractor. **Based on electric at 15p/kW/hr and COP of 3. Based on LPG at 40p a litre and 85% efficiency ***Ground source heat pumps have no requirement for annual maintenance. However, it is good practice for the heating distribution system to be proactively checked and maintained to ensure optimum performance. ****DOMESTIC RHI is a 7 year index linked funding stream which assumes inflation at 3%. *****Net cost for LPG does not include an additional LPG boiler, which will likely need to be  factored in during the 20 year comparison period due to the LPG’s 10 year average lifetime expectancy.

Case study: Long Crook

The Young’s built a stunning five bedroom property in the picturesque Scottish Highlands featuring a 21kW Kensa Hybrid ground source heat pump with solar thermal to provide 100% of the property’s heating and hot water needs.

Key facts

Read more