Boreholes

This section illustrates the costs of a small luxury new-build development featuring a Shared Ground Loop Array of boreholes serving Kensa Evo Heat Pumps.

We have provided a ground source heat pump design with schematic drawings and ground source heat pump installation costs for shared ground loop array options versus the LPG boiler alternative.

For a ground source heat pump review and case study we also showcase a small new build development featuring a Shared Ground Loop Array of boreholes connected to Kensa ground source heat pumps.

For more information, call sales on 0845 680 4328.

Example: Schematic

For illustrative purposes only

Example: Finances

Based on the above schematic, Kensa has calculated example costs below to illustrate the upfront finance required for self-financed and funded split ownership Shared Ground Loop Arrays featuring boreholes connected to Evo heat pumps in a small development.

Also included are expected running costs and income generated via the Non-Domestic Renewable Heat Incentive (RHI) over a 20 year period (the duration of the Non Domestic RHI), compared to an LPG boiler system. For a bespoke quote please click here.

Heat Pump Specification

System architectureShared Ground Loop Array
Total heat pump capacity52kW
Equipment type4 x 13kW Evo's
Design conditions0/40°C
Potable DHW temp60°C
Integral immersion heatersNo (DNO friendly)
Ground array typeBoreholes
Boreholes required*1200mtrs
Land area required600-900sq/m
*Boreholes based on average ground conductivity

 

Total Project Costs, Savings & Returns vs LPG

 Kensa Shared Ground Loop Array & GSHPLPG Boiler
Lifetime Expectancy: ApplianceUp to 20 yearsUp to 10 years
Lifetime Expectancy: InfrastructureUp to 100 years-
Carbon Saved (over 20 years)300 tonnes0
Local NOx emissions*0kg NOx/y5.24kg NOx/y
Appliance & Infrastructure Cost*£77K to £107K£15K
Running Costs (over 20 years)**£115K to £135K£175K to £200K
Servicing Costs (over 20 years)***£0£2K
RHI Income (over 20 years)****£170K to £200KNot eligible
Net cost excluding running & servicing (after 20 years)*****£93K profit£15K cost
*NOx emissions based on 56mg/Kwh for gas and liquefied petroleum gas (LPG) boilers (1800 run hours) **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 NON-DOMESTIC RHI is a 20 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.

Not the ideal scenario for you?

Shared Ground Loop Arrays featuring boreholes are ideally suited to larger projects with a minimum of 20 or more properties, where the return from the RHI will be greater.

Click here for more options

However, if your development is in an urban area with limited exposed land area available, then boreholes may be the most viable option.

Case study: The Dunes

A landmark luxury housing development comprising forty apartments and houses currently under construction amongst the famous dunes of Perranporth beach in Cornwall is featuring Kensa’s Shared Ground Loop Array and Shoebox heat pumps to breathe new life into a former derelict hotel site.

The Dunes sees five Shared Ground Loop Arrays consisting of 19 boreholes in total.

Read More

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