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 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 architecture||Single heat pump|
|Heat pump capacity||13kW|
|Equipment type||13kW Evo|
|Potable DHW temp||60°C|
|Intregral immersion heaters||No (DNO friendly)|
|Ground array type||Slinkies|
|Land area required||1000sq/m|
Total Project Costs, Savings & Returns vs LPG
|Kensa Ground Source Heat Pump & Ground Array||LPG Boiler|
|Lifetime Expectancy: Appliance||Up to 20 years||Up to 10 years|
|Lifetime Expectancy: Infrastructure||Up to 100 years||TBC|
|Carbon Saved (over 20 years)||28 tonnes||0 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 £28K||Not 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.
- 400m new build house;
- 5 bedrooms and 5 bathrooms;
- Off gas grid plot;
- 21kW Kensa Hybrid heat pump;
- 50m slinkies in front garden;
- Eligible for the Domestic Renewable Heat Incentive (RHI).