Boiler Installation in Harrow

Most installations are completed within a single day. A straightforward like-for-like combi swap typically takes 4–6 hours. Conversions — such as conventional to combi — or homes needing new pipework may take a full day or occasionally two. We'll confirm a realistic time estimate at the free assessment.

Costs depend on boiler type, your property size, and any additional pipework required — typically from £1,850 for a like-for-like combi swap, rising for system or conventional installations with more extensive work. All prices are fixed and agreed before work starts.

It depends on your property size and hot water demand. Combi boilers suit flats and smaller homes without space for a tank. System boilers suit larger homes with multiple bathrooms. Conventional boilers often suit larger properties with an existing tank setup, common in Stanmore. We'll advise on the right fit during your free assessment.

Yes, you'll need to be present for access, and again at the end for a run-through of your new boiler's controls and the handover of your warranty and Gas Safe certificate.

In most cases, yes — building regulations recommend a system cleanse before installing a new boiler, ranging from a simple flush to a full power flush depending on how contaminated the existing system is. This is assessed and quoted as part of your fixed price.

Manufacturer warranties of up to 10 years are available on leading brands including Worcester Bosch and Vaillant, in addition to our own workmanship guarantee on the installation itself.