Heat pumps in Exeter — from period homes to the South West's landmark projects.
Thermal Earth installs air- and ground-source heat pumps across Exeter and Devon. Our South West work includes a four-heat-pump cascade inside the historic St Margaret's Residences — and the geothermal system that warms Penzance's famous Jubilee Pool.
Devon's mild climate and its many off-gas villages make it one of the best regions in England for a heat pump — especially if you're paying for oil or LPG today.
No EPC? Send an enquiry or call 01269 833100. We can check the evidence needed for your property.
Installing and supporting across Devon.
We survey, install and service across Exeter and the whole county — 4,000+ systems installed, 20+ years of heat pumps, and our own drilling rigs for ground-source projects.
The postcode gives context — your building sets the design.
Before any heat pump is chosen, we understand the house: what it loses, what it needs and how you live in it.
Cold-day heat loss, room by room.
We measure what your home actually needs — not what the old boiler happened to be.
Improvements only where they earn their keep.
If insulation or draught-proofing would genuinely help, we'll say so. No blanket "upgrade everything first".
Measured, not written off.
Radiators, towel rails and underfloor heating are checked against each room — many homes keep most of what they have.
Air or ground, proven for your site.
Airflow and siting shape air source; land, access and ground conditions shape ground source.
Capacity checked up front.
Supply, controls and any enabling work are part of the design — not a surprise on install day.
Designed around the household.
Hot water habits, comfort expectations and easy servicing shape the final arrangement.
St Margaret's Residences, Exeter.
A historic former school, its story running back to 1902, converted into residences — with four custom-optimised MasterTherm AquaMaster AQ90i ground-source heat pumps at its heart.
The design pairs the ground-source cascade with retained gas and coordinates with solar-thermal systems — a deliberate hybrid for a complex old building, not a bolt-on. Old fabric and new services, read together.
Read the St Margaret's project storyWe keep being invited back over the Tamar.
Exeter sits in a region where we've delivered some of our best-known work.
Jubilee Pool, Penzance
Six heat pumps draw on a 410m geothermal well to keep the Grade II-listed lido's geothermal pool at 28 to 30 degrees — a Cornish landmark, warmed from the rock beneath it.
View Jubilee PoolLappa Valley, Cornwall
A heat-pump installation for one of Cornwall's much-loved family attractions — renewable heat in a setting where reliability matters every opening day.
Seaborough Court, Dorset
Part of our track record of heat-pump projects across the Devon and Dorset borders — alongside the homes we heat across the region.
The everyday route for most Exeter homes.
No boreholes or trenches — a quiet outdoor unit, full central heating and hot water.
We plan the unit's position for airflow, sound and boundaries, and design the radiators, hot water and controls around it. Devon's mild winters suit air source particularly well.
Explore air-source heat pumpsFor gardens, paddocks and bigger projects.
With usable land, trenches or boreholes give the steadiest source of all — drilled by our own in-house rigs.
St Margaret's shows what ground source can do in an Exeter building; whether it suits your site comes down to land, access and heat demand, which the survey settles.
Could a heat pump lower your heating bills?
For most Devon homes on oil or LPG, yes — and often substantially. The honest answer depends on your house, your tariff and the fuel you're replacing, so our estimator starts from your property rather than a national average.
Support for the life of the system.
Commissioning day isn't goodbye. Annual servicing and our Comfort Care plan keep the system healthy for as long as you want us involved.
That means planned servicing, remote monitoring and a team that actually understands heat pumps — available across Devon from our Ammanford base, years after the installers have packed up.
Planning, city direction and current support.
Net Zero Exeter 2030.
Exeter's adopted plan puts cleaner heat and building retrofit firmly in the city's direction of travel.
Read the adopted plan recordMost homes: no permission needed.
Most installations fall under permitted development in England. Listed buildings and conservation areas — Exeter has plenty — can need consent, and we check for every job.
Read the current England planning amendmentGrant help, handled with you.
You may qualify for the Boiler Upgrade Scheme — we handle the application. Devon has local support too.
Eligible air-to-water or ground-source heat pump installations receive £7,500. If your property has no mains gas connection and you are replacing oil or LPG heating, the grant is £9,000 for applications properly made from 21 July 2026 to 31 March 2027. We check eligibility for your home.
Exeter, East Devon and beyond.
Exeter city, Topsham, Exmouth, Sidmouth, Honiton, Tiverton, Crediton, Okehampton, Tavistock, Newton Abbot, Torquay, Totnes and Dartmouth — plus rural East and Mid Devon.
We also work across the Devon–Dorset–Somerset borders and into Cornwall. See everywhere we work.
Thinking about a heat pump in Exeter?
Get a free online estimate for your home — or for heritage, multi-residential and development projects, send us the site and we'll talk it through.