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Claim this listing4.7
75 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
OHM Energy Limited is an MCS certified air source installer based in East Sussex. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Based in East Sussex, BN27 3GU
Areas served:
4.7
75 Google reviews
Based on verified Google reviews
René W
We had solar panels removed around make space for a velux window. The initial quote was £476, with reassurance that if the work took longer it would only be “slightly more”. However, the final bill came in at almost double this amount, and we were not contacted on the day to advise that costs were escalating or to seek approval before the work was completed. That said, communication during the dispute itself was polite and professional, and once we raised our concerns the company did engage constructively. They acknowledged that the wording used in the estimate was unhelpful and ultimately agreed to a reduced and more reasonable final price, which we appreciated. The work itself was completed, and while we were unhappy with how the pricing was handled initially, we were pleased that the matter was resolved amicably in the end. Clearer communication around estimates and cost overruns would significantly improve the experience.
Rob Sale
A very positive experience. OHM installed an Air Source Heat Pump in May 2025. The whole process from initial survey to completion was friendly, professional and efficient. We are very happy with the quality of the work and would recommend OHM to anyone considering a heat pump.
Graham Stew
A challenging task was tackled expertly by this company. The team of Russell, Simon, Henry, Gino, Adam, and Josh were cheerful and skilled in replacing all the radiators, siting the pump and squeezing the cylinder into a small space. A new shower was fitted very neatly. Everything is now in place and working. It's too soon to tell if the system will cope with cold weather, but so far so good. I can recommend OHM Energy as a heat pump installer.
Chris Early
It has been a pleasure dealing with Paul, Emma, Ollie and Keith at OHM. I have had a ground source heat pump installed by them aswell as PV panel system. The work was prompt and efficient but in particularly the after sale service and customer care is excellent. It is a big outlay and they always take time to answer questions and queries. Saving up for my Powerwall battery now and will be using these guys!
Becky Crow
OHM fitted an air source heat pump for us- It was a slightly tricky install into a fairly tight space that Octopus energy had said that they couldn't do. They came with the creative thinking required to route the pipework as straight forwardly as possible and fit a slimline cylinder into our smaller space. It was a 4 day job on the heat pump install with an extra day beforehand to upgrade some radiators. All the team were polite, professional and communicative. We are happy with the outcome.
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We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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