Boiler Installation in London
Professional installation of new gas boilers across Harrow and north-west London. We fit combi, system and regular boilers with full Gas Safe certification.
Gas Safe Registered | Manufacturer Warranties | Fast Installation
Installation Prices
| Installation Type | Price Guide |
|---|---|
| Combi boiler replacement (like-for-like) | From £1,200 |
| System boiler installation | From £1,800 |
| Regular boiler replacement | From £1,600 |
| System conversion (e.g. regular to combi) | From £2,200 |
Prices include boiler unit, installation labour, flue, controls, system cleanse and certification. Final quote depends on property requirements.
What's Included
- New boiler with warranty
- Full installation
- Flue & condensate
- Controls upgrade
- System flush
- Gas Safe certification
- Old boiler removal
Choose Your Boiler Type
Combi Boiler
Best for: Flats, 1-2 bedroom properties
Heats water on demand, no tanks needed. Space-saving solution.
System Boiler
Best for: 3+ bedroom homes
Works with hot water cylinder. Ideal for multiple bathrooms.
Regular Boiler
Best for: Traditional systems
Requires cold water tank and cylinder. Suitable for older properties.
Installation Process
Free Survey
Property assessment and boiler recommendation
Fixed Quote
Detailed written quotation
Installation
Professional fitting, typically completed in 1 day
Commissioning
Testing, certification and warranty registration
Service Areas
We install boilers throughout Harrow and surrounding north-west London areas:
Reviews - experience that matters
Thorough service and friendly engineer
They are a company you can trust. They are quick at coming to sort a problem out. My recent experience of two engineers couldn't be better, I felt safe after they left.They were both polite,friendly gave full explanation of work carried out, both what I call "old school engineers", an asset to Harrow Heating. - Martin Devine
Posted today (August 16, 2026)
Harrow Heating top notch
The engineer arrived well within the allocated time scale. He checked the location of the jobs and got on with the installation of the new boiler. I find Harrow Heating trustworthy and efficient. I have always been very satisfied with the service I have received. I would have no reservations about recommending them. - Nick Child
Posted about 3 days ago (August 13, 2026)
Great Service
More than usual the engineer was friendly, straightforward, thorough and clearly very skilled and experienced at his job. Used Harrow Heating for few years, always find them reliable, knowledgeable and value for money. Engineers are highly competent and explain everything, feel safe, our boiler is kept in top condition. - claire
Posted about 7 days ago (August 09, 2026)
Annual boiler service, great experience
The engineer contacted me to let me know he was on his way, he was on time. He was respectful of my home using shoe covers to protect my carpets. He was thorough and explained what he was doing and overall was polite and professional. - Alan Grant
Posted about 13 days ago (August 03, 2026)
Highly recommend
Following an annual service from Harrow Heating, a couple of faults with my boiler were identified. A second visit was scheduled just 2 days later to resolve the issues. The engineer was polite and professional, explained the work that was necessary and was finished within the hour. Highly satisfied with the service. - Carol
Posted about 18 days ago (July 29, 2026)
well done
We are loyal customers of Harrow Heating for nearly 3 years for our residential as well as rental properties. Now even our children are with them. Harrow Heating has never let us down. Their engineers are very knowledgeable, polite, patient and helpful. Keep up the good work. Well done - Mutaher K
Posted about 19 days ago (July 28, 2026)
Pleased with service.
Pleased with the service. Engineer was polite and didn't try to sell me anything I didn't want. - Mr Speirs
Posted about 23 days ago (July 24, 2026)
Good and quick response.
The engineer arrived promptly, was courteous and friendly. Worked extremely quickly and efficiently and explained very carefully the problem with our old gas fire. - Alice
Posted about 27 days ago (July 20, 2026)
Very professional engineer for annual service.
Arrived promptly at the agreed time. He was professional throughout the visit. Spoke to me obout a service called HIVE. No pressure was applied but did arrange for me to receive information about the service which I received after a few days. - Derick Tait
Posted about a month ago (July 17, 2026)
Excellent customer focus.
Good all round service - really good contact- engineers knowledge excellent - -Mrs Kane
Posted about a month ago (July 11, 2026)Frequently Asked Questions
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