This section provides homeowners with schematic drawings, example Kensa heat pump and ground array costs comparative to LPG, and a real-life case study to showcase how a micro-district ground source heat pump system fed by a slinky ground array designed can provide heating and hot water to multiple buildings..
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 Non-Domestic Renewable Heat Incentive (RHI) over a 20 year period (the duration of the Non Domestic RHI), compared to an LPG system. For a bespoke quote please click here.
Heat Pump Specification
|System architecture||Micro District|
|Total heat pump capacity||52kW|
|Equipment type||4x 13kW Evo's|
|Potable DHW temp||60°C|
|Integral immersion heaters||No (DNO friendly)|
|Ground array type||Slinkies|
|Land area required||3500sq/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||-|
|Carbon Saved (over 20 years)||300 tonnes||0|
|Appliance & Infrastructure Cost*||£56K to £72K||£15K|
|Running Costs (over 20 years)**||£115K to £135K||£175K to £200K|
|Servicing Costs (over 20 years)***||£0K||£2K|
|RHI Income (over 20 years)****||£170K to £200K||Not eligible|
|Net cost (after 20 years)*****||£1K to £7K||£192K to £217K|
*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.