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Henman Dunn Limited

MCS Certified BUS Registered
38 Glass House Hill, Codnor, RIPLEY, Derbyshire, DE5 9QT
Air Source specialistBUS grant eligible158 reviewsServes 12 regions

5.0

158 Google reviews

1–2 days

Typical install time

£7,500

BUS grant amount

About Henman Dunn Limited

Henman Dunn Limited is an MCS certified air source installer based in Derbyshire. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.

System typesAir Source
BUS grant handledYes

Coverage area

Map coming soon

Based in Derbyshire, DE5 9QT

Areas served:

North WestNorth EastLondonEast MidlandsWest MidlandsEast of EnglandSouth EastSouth WestYorkshireScotlandWalesNorthern Ireland

Reviews

5.0

158 Google reviews

Based on verified Google reviews

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Claire Cowlishaw

6 months ago

We had the pleasure of using Herman Dunn to install our new radiators . Ben and Sin arrived at our house at the time agreed. As I had to leave for work before they arrived my mother met them at home and said what lovely and polite men they both were. I was really impressed by the workmanship and professional attitude from Ben and Sin. I would highly recommend the company and will be definitely using them in the future.

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Luanne Hunt

a year ago

Henman Dunn came recommended to us and I’m so glad we used them. They moved our boiler, fitted an unvented cylinder and removed our existing cylinder and water tank. Ashleigh quoted and understood everything than we wanted to do. Everything happened so smoothly. Nothing was a problem. Michael and George worked flat out. So courteous and respectful. Cleaned up after themselves and took all the rubbish away. We have an old house with lots of work to do, so this is one less job to do. We will definitely use them again. Thank you.

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Garry Hague

7 months ago

Received a recommendation for this company and very pleased that I did. Was lucky to get a quick appointment due to a cancellation. The engineer arrived right on time. He was polite and courteous and very efficient in the work he carried out. I will certainly use them again in the future and would definitely recommend them to others.

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Kim Woodhall

4 years ago

Highly recommend Ash and his team at Henman Dunn from start to finish........ We had a full bathroom makeover. Ash, came out and planed the bathroom with us design it nothing was to much trouble for them, workmanship was outstanding, a big thank you to Tim & Adam arrived to start the job totally removed all bathroom fittings airing cupboard and wall was took out old water tank and system. Fitted new combi boiler and pipe work to get the system up and running again... New drencher and shower cubicle fitted plus new vanity unit and loo and sink... mermaid board fitted to walls ceiling done with pvc new spot lights in. Fitted mirror tower rail heater, And floor covering... Have to say how the old bathroom looked it was a totally amazing transformation... Just like to say Excellent service great guys and would highly recommend them .. Thank you again we love it... Steve & Kim Woodhall. AAAAA

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Dean Yates

10 months ago

The engineer’s turned up on time, worked in a professional manner and cleaned up after the job was done. I would thoroughly recommend this company if you’re considering a boiler installation. Lastly we had a few queries that needing resolving. Julia in the office was very professional, reassuring and had the engineers out the next day. Nothing was too much trouble. The customer service was excellent. Thank you.

Showing 5 of 158 reviews. View all on Google

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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Verified credentials
NAPIT Registered
BUS Registered
Quick facts
Regions covered12 areas

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

Check your eligibility

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