Ground-source earns its higher capital on buildings that run year-round or need summer cooling, because the ground stays at a steady temperature and the efficiency barely moves in the coldest weather. The same array can provide passive or active cooling in summer, so one plant set covers both seasonal duties. It is the strongest long-term economics where land or borehole access exists and the building runs hard all year.
The programme is dominated by the ground works, so those are sequenced first, not last. A ground investigation and a thermal response test confirm the ground conditions and set the final loop design. Drilling needs a compound, rig access and space for arisings, and is the noisiest, most space-hungry phase, so it is planned into the site logistics — often out of term time for a school or a hotel’s quiet season. Once the array is grouted it is invisible and can last decades.
How ground-source heat pump is installed
Delivery runs: ground investigation and a thermal response test; set out and drill the borehole array (typically 100-200 m deep) or lay horizontal loops; grout and pressure-test the ground loop; run the array back to a manifold and header into the plant room; install and connect the heat pump and buffer; confirm the electrical supply; then a phased cutover and a commissioning witnessed by the client that proves the year-round SCOP and any cooling duty.
What this install includes
- Highest and most stable efficiency (SCOP often 4.0+ year-round), so performance holds in the coldest snaps
- The programme is drilling-led: a thermal response test and ground investigation precede final loop design
- Delivers low-cost passive or active cooling in summer, one plant set covering both seasonal duties
- The longest-lead route, so ground works and any DNO supply upgrade are sequenced first, not last
Typical ground-source heat pump installation
- Heat output
- 50-1,000 kW thermal
- Heat-pump plant
- borehole array (typ. 100-200 m deep) or horizontal ground loops
- Plant / array area
- ground / borehole field, varies hugely by site
What this install costs
The price of a ground-source heat pump installation is set by capacity, emitters, electrical supply and siting, and is only meaningful once the running cost is modelled on a real SCOP from consumption data. Qualifying special-rate integral-feature plant gets the Annual Investment Allowance at 100% on the first £1m a year; grant schemes change, so confirm the current status of any public-sector or industrial scheme on gov.uk, and general commercial premises do not get 0% VAT. See the cost guide, capital allowances and grants and funding.
Compliance and standards
Closed-loop arrays follow Environment Agency closed-loop guidance; open-loop systems that abstract or discharge groundwater need an EA permit. Borehole fields may need planning depending on scale. CIBSE TM51 and MIS 3005 design principles apply, and the drilling compound, access and arisings are planned into the site logistics up front.
Higher capital and longer programme because of the ground works. Closed-loop arrays follow Environment Agency closed-loop guidance; open-loop systems abstracting or discharging groundwater need an EA abstraction/discharge permit. A ground investigation and thermal response test inform final design. CIBSE TM51 and MIS 3005 design principles apply. Borehole fields may need planning depending on scale, and the drilling compound, access and arisings are planned into the site logistics.
Getting it connected and signed off
The electrical supply sets the programme as much as the plant. The available capacity is checked at survey and the DNO conversation opened early, then the system is commissioned with certification and a planned O&M regime handed over. See also whether a commercial heat pump is worth it.
Related reading: the overview of commercial heat pump installation, the commercial heat pump cost guide, heat pump capital allowances, the heat pump cost calculator uk and how long does heat pump installation take.
For boreholes, thermal response testing and permits, read the commercial ground source heat pump guide, and compare options in air source vs ground source heat pump.
Ground-Source Heat Pump Installation: at a glance
| Attribute | Typical for this install |
|---|---|
| Heat output | 50-1,000 kW thermal |
| Plant / siting | ground / borehole field, varies hugely by site |
| Performance standard | BS EN 14825 (SCOP), commissioning witnessed by the client |
Request a ground-source heat pump installation quote
Replies by email
- 1. Desk feasibility from the building details and consumption data you send, no obligation.
- 2. A plain assessment of the flow temperature and supply questions.
- 3. Next steps laid out plainly, with no obligation.
Common questions
How do you size a commercial heat pump?
From a heat-loss survey and at least twelve months of gas or oil consumption, never from floor area. Sizing sets the peak heat load and the flow temperature the emitters allow, because a lower flow temperature lifts the SCOP. Typical commercial air-source systems land between 40 and 500 kW thermal; ground and water-source 50 kW-1 MW+; industrial and heat-network schemes larger again. Specifying to BS EN 14825 makes quoted performance comparable across suppliers.
Will the electricity supply cope with the added load?
That is checked at survey, before anything is ordered. Large heat pumps add meaningful electrical load, so the available incoming supply capacity should be confirmed, and where a DNO supply upgrade is needed it is started at feasibility because it is often the longest-lead item. On constrained sites, phasing, hybrid designs or demand management can keep the project within capacity.
Is planning permission and an acoustic assessment needed?
Planning for external plant depends on the local planning authority, the building's use class, the siting and the noise, so check the Planning Portal and the council before ordering. A BS 4142 acoustic assessment is commonly used to show the external plant will not disturb neighbours, and it is best completed before the plant is ordered. Listed buildings and conservation areas need consent, and ground-source or water-source schemes may need planning and an Environment Agency permit. All of this is confirmed at feasibility.
What's the difference in installing air-source, ground-source and water-source?
Air-source is the fastest and least disruptive: no ground works, plant craned to a compound, cutover in hours, but siting and acoustic are the delivery risk. Ground-source is drilling-led, a thermal response test and boreholes precede final design and the programme is longer, but efficiency is the highest and most stable. Water-source is source-consent led, needing an intake and an EA permit, and suits waterside sites. All applicable options are modelled and programmed from the building's own data before one is chosen.
What is a hybrid heat pump installation and when is it the right call?
A hybrid (bivalent) install pairs a heat pump with a peaking boiler. The heat pump covers 70-90% of annual heat, the vast majority of operating hours, and the boiler tops up only on the coldest days. It needs a smaller, cheaper heat pump, suits buildings with high-temperature emitters, keeps the existing boiler as backup through commissioning, and de-risks the worst-case cold spell. For many commercial retrofits it's the most cost-effective and lowest-risk decarbonisation route.