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Claim this listingGRM Energy Ltd
4.4
51 Google reviews
1–2 days
Typical install time
About GRM Energy Ltd
GRM Energy Ltd is an MCS certified air source installer based in Hertfordshire.
Coverage area
Based in Hertfordshire, WD18 9DA
Areas served:
Reviews
4.4
51 Google reviews
Based on verified Google reviews
Steve Aldous
Thanks so much for our new heating system. The Air source and solar have saved us so much money and the house is so much Warmer. Loving the heating controls and the app that we can use when away to make sure we can control the temperature. Process has been easy, the installation team were fantastic and have done a great job . Office girls were all polite and helpful . Great experience, Thank you.
McDuck
After the initial review and eligibility checks the work was done, and it was much less hassle than I thought. Great team, very thorough. Alex was my go to, and she was absolute gold -still is with after care- with all the installation process. Can’t recommend enough.
Emily Michael
Great job done insulating walls and my loft, extractor fans and window vents were also installed for ventilation. The flat feels a lot warmer already 🙂 Thank you!
Deb REAVLEY
Brilliant work! They installed a heat pump, solar panels and a battery. The tradesmen were brilliant. Declan put the solar panels up, the plumbers Gareth and Jamie worked like Trojans. Josh and Ethan the electricians were brilliant. Really thrilled, thank you and I highly recommend this company
ATTIA Begum
The guys that came out were so professional the leader was hashim he was brilliant explained everything. I watched them he talked me through how the insulation will be done in the loft and the cavity walls. They all did an amazing job. This company is brilliant if anyone thinks about getting this done go with them. From the moment this was booked in the staff are extremely professional. We are so happy with the job our house this winter has not needed the central heaters on for more than 30 mins and warms up even better now and keep the heat it. So thank you soo much as I have an elderly mum who lives with me and three young boys.
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Frequently asked questions
How do I know you’re properly qualified and certified to install heat pumps?
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).
Can you tell me if a heat pump is actually suitable for my home?
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.
What type and size of heat pump will you recommend for my property, and why?
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.
What will the full installation cost be, and what’s included in your quote?
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.
Can you help me access government grants like the Boiler Upgrade Scheme?
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.
How much disruption should I expect during installation, and how long does it take?
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.
Will I need to replace my radiators or upgrade anything else in my home?
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.
How noisy is the outdoor unit and where will it be installed?
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.
What warranties, servicing and aftercare do you provide?
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.
What running costs and savings can I realistically expect compared to my current boiler?
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.
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