How much will a ground source heat pump borehole system cost for a commercial building?
In this example, a cascaded ground source heat pump system fed by a borehole ground array, could cost in the region of £217,000 to £232,000, and earn between £350,000 and £400,000 income from the Non Domestic Renewable Heat Incentive (RHI).
Example: Project & Finances
Kensa has calculated example costs to illustrate the upfront finance required for a cascaded ground source heat pump system and borehole ground array for a commercial building, compared to an LPG system.
Expected running costs and Non-Domestic Renewable Heat Incentive (RHI) income are also included.
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Heat Pump System
|System architecture||Cascaded central plant|
|Total heat pump capacity||120kW|
|Equipment type||3x 45kW Plant Rooms|
|Potable DHW temp||Space heating only|
|Integral immersion heaters||No (DNO friendly)|
|Ground array type||Boreholes|
|Land area required||2000sq/m|
*Boreholes based on average ground conductivity
Total Project Costs, Savings & Returns vs LPG
|System||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||-|
|Carbon Saved (over 20 years)||800 tonnes||0 tonnes|
|Local NOx emissions*||0kg NOx/y||12.09kg NOx/y|
|Appliance & Infrastructure Cost**||£217K to £232K||£7K|
|Running Costs (over 20 years)***||£350K to £400K||£450K to £550K|
|Servicing Costs (over 20 years)****||£0||£2K|
|RHI Income (over 20 years)*****||£350K to £500K||Not eligible|
|Net cost (after 20 years)******||£132 to £217K||£459K to £559K|
*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.
*For illustrative purposes only
Not the ideal scenario for you?
Borehole systems 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
If your business is in an urban area such an industrial park with limited exposed land area available, then boreholes may be the most viable option.
If a commercial premises has a high demand for heating and hot water, then modular cascaded ground source heat pumps provide an effective solution to meet the heat load of the property.