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Ground Source Heat Pump Installation In Challock, Kent, TN25


     Detached 18th Century home – refurbished throughout

Heating System:

     New Ground Source Heat Pump with a mixture of radiators and underfloor heating

Heat Pump installed:

     Stiebel Eltron WPF 14 Set S – a cascade system incorporating 2x 7kW single phase      ground source heat pumps

Type of collector:

     Horizontal ground array consisting of 4x 250m ground loops installed into garden


     Challock, Kent TN25


Job Overview – £21,148.00 + VAT @ 5%

Reina Group received an enquiry from the homeowner in September 2013 regarding a heat pump system to be installed at their home. After providing the customer with indicative costs and information on different heat pump systems she decided to proceed with a site visit. Our heat pump manager Dan Large attended site and sat down with the customer to discuss her system in detail. The property in its existing state was cold and drafty but was to undergo a full refurbishment to keep the heat in the building. This sort of approach is perfect when adapting a renewable heating system like a heat pump to help reduce carbon emissions and running costs further.

A full room by room heat loss (to MIS3005) was undertaken to ascertain the heat pump, emitters and ground array size – these three bits of information are critical to ensure an economical working system capable of heating the property to the design criteria. Once the design was complete Reina Group issued the customer with a formal quotation which highlighted all the works to be undertaken by the Reina Group. We were contracted to install the heat pump and associated plant (April 2014) and the customers long associated plumber was contracted to install the heating system and plumbing works. To ensure the system works correctly Reina Group would oversee the heating installation and provide radiator schedules for the property.

The ground collector was installed and trenched by preferred local trenching contractor Trenchcut to the Reina Group design. This was undertaken early on in the project (June 2014) while building works were being undertaken.

A small lean-to was installed to side of the property to house the ground source heat pump, buffer vessel and hot water cylinder. The heat pump was then installed in August 2014 awaiting works to be completed in the home.

The heat pump and system was wired and commissioned in December 2014 keeping the house warm and providing hot water throughout. A handover CD was provided to the customer with all the information on the system installed and details for the customer to claim their government grant (RHI). They are now claiming over £3K annually for 7 years from the Renewable Heat Incentive and saving over £700.00 annually on fuel costs compared to a new oil boiler.


Heat Pump Installation In Challock, Kent, TN25

Site:–  TN25 – Challock

Dwelling Description:- 4 bed Detached 1980’s 350m2  two storey property

System Design:- Following heat loss calculations a heat loss of 27.48kW was determined at a design temperature of minus -2.40C with a total energy demand (including hot water) of 54,500 kWhr/yr

Heat Pump :- Vaillant 3 phase geoTherm 30kW “open loop” heat pump, together with a 500 litre buffer & 400 litre cylinder

Boreholes – 190m abstraction & discharge well – Due to site location an extremely deep well by OT Drilling required

Estimated return via RHI tariffs in next 7 yrs – £45,000.00

Job Ref:- 11147

30kW heat pump with 500 litre buffer tank located in basement

Accreditations in place The Reina Team Contact Us Instant Heat Pump Quote


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