Boreholes

This section provides businesses with schematic drawings, example Kensa heat pump and ground array costs comparative to LPG, and a real-life case study to showcase how a single ground source heat pump system fed by a borehole ground array 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 typeBoreholes
Boreholes required*360mtrs
Land area required200sq/m
*Boreholes based on average ground conductivity

 

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 years-
Carbon Saved (over 20 years)28 tonnes0 tonnes
Appliance & Infrastructure Cost*£25K to £32K£1.5K
Running Costs (over 7 years)**£9K to £11K£14K to £16K
Servicing Costs (over 7 years)***£0K£700
Domestic RHI Income (over 7 years)****£24K - £28KNot eligible
Net cost (after 7 years)*****£10K - £15K£16.2K - £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. ****The 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: Eco House, Wanstead

Architect Jason Harris was looking for a renewable heating system to complement an innovative eco home he was building in East London. Land area was restricted due to the urban nature of the site, but thanks to a unique borehole drilling method, a Kensa ground source heat pump was successfully installed.

Key facts:

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