Air Source Heat Pump Installation in Hemel Hempstead, HP1–HP3
EE Renewables Ltd installs MCS-certified air source heat pumps across Hemel Hempstead. As a new town built in a concentrated burst from the 1950s, Hemel has something most places don’t — thousands of near-identical houses. That makes heat pump design here unusually predictable. Book a free survey today.
Why install an air source heat pump in Hemel Hempstead?
Hemel was designated a Mark One New Town in February 1947, masterplanned by Geoffrey Jellicoe, and built out at pace through the 1950s — Adeyfield first, with the keys to the earliest houses on Homefield Road handed over in 1950, then Bennetts End, Warners End, Chaulden, Highfield and Grovehill. The Development Corporation wound up in 1962. That concentrated build period left the town with something genuinely useful: a small number of house types repeated thousands of times.
For heat pump design that’s a real advantage. Construction is consistent and known, so heat loss is predictable rather than a series of surprises. Most of the stock is cavity-walled, which insulates far better than the solid-wall Victorian terraces that dominate older towns, and post-war radiators were generally sized generously — meaning fewer emitters need upsizing to run at heat pump flow temperatures. Jellicoe’s “town in a park” principle also left neighbourhoods with proper gardens and space around houses, so siting an outdoor unit is rarely the fight it is in a dense terrace.
Put plainly: Hemel has one of the more heat-pump-ready housing stocks in the South East, and once a system has been designed properly for one example of a house type, that design transfers to every other house of the same type in the neighbourhood. We’d rather tell you your street is straightforward than pretend every job is bespoke.
Two other groups are worth noting. Later housing at Woodhall Farm and the 1970s and 80s estates is better insulated again and often needs a smaller system than owners expect. And out in the Dacorum villages beyond the Green Belt boundary, a meaningful number of properties have never had a gas connection — those homes qualify for the uplifted £9,000 grant rather than £7,500.
Book a free home survey with your local HP installers
Heat pump installation cost in Hemel Hempstead
Predictable stock means predictable pricing, which is why the bands below are tighter than you’d see in a town with more varied housing. The main variables are whether a combi boiler has already displaced the hot water cylinder, and whether the cavity walls have been filled — an unfilled cavity in a 1950s house pushes heat loss and system size up noticeably. Figures reflect 2026 MCS installer pricing across HP.
| Hemel Hempstead property type | Typical system size | Installed cost | Cost after grant |
|---|---|---|---|
| New town terrace (Adeyfield, Bennetts End, Highfield) | 5–7kW | £8,000–£10,000 | £500–£2,500 |
| 1970s–80s estate house (Woodhall Farm, Grovehill) | 6–9kW | £9,000–£12,000 | £1,500–£4,500 |
| New town semi (Warners End, Chaulden, Leverstock Green) | 8–10kW | £10,000–£13,000 | £2,500–£5,500 |
| Detached or off-grid village home (Bovingdon, Flaunden, Potten End) | 10–16kW | £13,000–£18,000 | £4,000–£9,500 |
Grants & benefits of installing a heat pump in Hemel Hempstead
£7,500 Boiler Upgrade Scheme grant
Hemel homes replacing a gas boiler or electric heating qualify for £7,500 towards an air source heat pump, and properties beyond the gas grid in the Dacorum villages running oil or LPG qualify for £9,000 until 31 March 2027. We make the Ofgem application as your MCS-certified installer and deduct the grant from your invoice, with zero-rated VAT on the installation.
Fill the cavity first
Hemel’s 1950s stock was built with cavity walls, but plenty were never filled. Insulating the cavity before installation reduces heat loss enough to drop you a system size — which lowers both the quote and the running cost. It’s the cheapest thing you can do to improve a heat pump’s performance, and we’ll always tell you when it’s the better first step, even though it means a smaller job for us today.
Improve your EPC rating
Replacing a gas boiler with a heat pump generally lifts an EPC score, and the gains are largest where insulation is already sound — which describes much of the town’s cavity-walled new town housing once the cavities are dealt with. Dacorum commissioned a full assessment of its domestic housing stock to identify exactly which homes need what, so the evidence base locally is better than most.
Support Dacorum’s net zero commitments
Dacorum Borough Council declared a climate emergency in 2019, pledging to be net zero as an organisation by 2030 and to support the whole borough — including its housing stock — to reach net zero by 2050. Housing is explicitly named in that commitment, and with the town’s stock as uniform as it is, progress on one house type scales quickly across thousands of homes.
PARTNERS
Hemel Hempstead’s Octopus Energy trusted renewable energy partners
We’ve spent over a decade in green home energy and we’re MCS-approved installers of Vaillant UK air source heat pumps. We’re also an Octopus Energy Trusted Partner, and at the 2026 Octopus Energy Trusted Partner Awards we were named Solar & Battery Installer of the Year from more than 650 partners nationwide.
In a town where neighbours live in the same house type and compare notes, doing the job properly matters more than usual. Octopus selects and monitors its partners on installation quality and customer service, so the credential can be checked rather than taken on trust. The partnership also opens up the smart heat pump tariffs that decide whether your running costs genuinely fall. Where existing pipework is sound we can usually reuse it.
Selected, vetted and monitored by Octopus Energy for safety, quality and customer service. Not Octopus Energy employees.
ASHP running costs and savings for Hemel Hempstead homeowners
Under the Ofgem cap for July to September 2026, electricity costs 26.11p per kWh against 7.33p for gas — roughly three and a half times as much. A heat pump only comes out ahead because it produces three to four units of heat per unit of electricity, so a system running at a SCOP of 3.5 sits close to gas parity on a standard tariff. Whether you beat that depends on design, commissioning and how much heat the house loses.
That last point is where Hemel’s stock helps. A cavity-walled house with the cavity filled and a decent loft needs lower flow temperatures, achieves a higher seasonal efficiency, and costs meaningfully less to run on identical equipment than a solid-wall property would. The saving itself comes from the tariff: on a specialist heat pump tariff with cheap off-peak rates, the Energy Saving Trust puts typical annual savings at £200–£400 against gas, plus the gas standing charge if you leave the network entirely.
Households on oil, LPG or electric storage heating see reductions of a different order altogether. We model your property’s actual heat demand at survey and show you real figures for your home, your insulation and your tariff before you commit to anything.
WHY CHOOSE EE RENEWABLES
Get an air source heat pump quote in Hemel Hempstead
Every air source heat pump quote from EE Renewables starts with a free home survey rather than an online calculator. We assess your property’s fabric and heat loss, check whether the cavities are filled, run the MCS 020(a) acoustic assessment, confirm permitted development status, establish whether your radiators, pipework and cylinder can stay, sort your Boiler Upgrade Scheme eligibility, and give you a fixed price with no obligation.
We cover HP1 to HP3 across the town — Adeyfield and Bennetts End, Warners End and Chaulden, Highfield and Grovehill, Woodhall Farm and Leverstock Green — and out into the Dacorum villages towards Bovingdon, Potten End and Berkhamsted. Full MCS certification keeps every installation compliant and grant-eligible, and our aftercare team stays available long after commissioning.