10-year cost of ownership
Our 10-year cost-of-ownership comparison is being verified with our finance partner.
We'll publish the full table shortly. The pricing commitment in our Honest Total Price page holds today.
Honest comparison
Us, them, and the full picture.
Not every installer is right for every home. Here's how we compare to the main UK players — and when one of them is genuinely a better choice than us.
Start here
Install price isn't the right number to compare.
If you're comparing installers, the first number you'll see on each website is the headline install price. That number is easy to compare — and it's the wrong number.
The price that actually matters is the 10-year total cost of ownership: install + consumables + annual service + warranty coverage + repair probability. We'll show you that number below, for us and for our main competitors, using real data where it's available and clearly flagged estimates where it isn't.
If you take nothing else from this page, take this:
On the day we install, our price matches the invoice. On the day ten years later, our install has cost you less than the "cheaper" alternative.
The full picture
10-year total cost — typical 3-bed combi swap.
Numbers below are illustrative for a typical 3-bed Greater London postcode. Your specific property may vary. Full assumptions under the table.
What this actually says
Where each installer genuinely wins.
Heatable wins on raw 10-year cost on this model — by a margin we're verifying with our finance partner before publishing the exact figure. If you're optimising purely for the lowest possible 10-year cost on a gas combi, and your property is simple, Heatable may be the right choice for you. They're a well-run online-first installer.
What they won't give you:
- The same engineer from survey to handover
- A local team you can call when something goes wrong in year 3
- A written survey before install
- Honest advice if a heat pump would have been better for your specific home
- Accountability through a named local director
If those things don't matter to you for this install, they're genuinely a good option. If they do, we are.
BOXT wins on speed and simplicity for straightforward jobs — their online-only model is slick, and for a simple combi swap on a typical property with no complications, they're fast. Same caveats apply on accountability.
British Gas loses on total cost almost uniformly, because their pricing is inflated by their scale and their service contracts are designed to bundle lifetime revenue into the initial sale. If you already have a British Gas relationship and value the brand familiarity, fair enough — but the numbers don't support choosing them on cost alone.
We're the right choice when:
- You want someone local and accountable across the 10-year lifetime, not just the install day
- You want advice that might tell you not to buy from us (heat pump candidate, repair-first, etc.)
- You value the things bundled in our price that others bill separately
- You're taking on a complex install — non-standard flue, multi-service retrofit, older property
Methodology
Where the numbers came from.
- Install prices: from each installer's public website, for a “3-bed combi swap, standard roof flue, wall-mounted” configuration. Prices vary with specification, installation complexity, and the quote tool's specific property details.
- Extras: drawn from each installer's disclosed pricing for add-ons, where available. Where not disclosed, we use industry-standard figures and flag them.
- Annual service costs: from each installer's publicly quoted annual service pricing.
- Warranty years: manufacturer default when fitted by that installer.
- Repair probability: qualitative assessment based on anonymised survey of 200 post-install repair cases UK-wide, 2024–2025. Not exhaustive — indicative only.
What about local tradespeople?
A fair word for good local installers.
This comparison focuses on national online-first installers because that's who most UK homeowners are comparing us to in 2026. But good local tradespeople exist — and for many simple jobs, they'll offer excellent value and personal service.
Where a good local installer is genuinely a better choice than us:
- You already have an established relationship with one
- Your job is a straightforward single-measure install with no complexity
- You want someone who can be in the property within 48 hours for a small job
Where we have the edge over a local single-trade installer:
- Multi-measure coordinated retrofit (insulation + heating + solar)
- Public sector or framework-regulated work (PAS 2030, SHDF)
- Specialist BUS grant paperwork and MCS certification
- 10+ year accountability that survives any individual tradesperson moving on
Our public Trustpilot rating is 4.8 across 216 reviews.
See all 216 reviews on Trustpilot, including the 4 two-star ones. No filter. →
If after all of this you still think we're not right for you, we'd genuinely rather you went with the right installer than the wrong one.
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