01Prices
Every seller's latest price
Sorted by price, then by the date we read it. One price type and grant state is compared; any other sits apart and says so.
- Lowest
- £2,260 fixed price, E.ON Next: the cheapest of the 2 sellers read.
- Middle
- No median yet: it needs three sellers with a fixed price price.
- Highest
- £2,400 fixed price, Boiler Central, which includes quote postcode: ng1 4bx.
Some seller links may earn FittedPrice a commission. It never changes the order: every list is sorted by price, then by the date we read it. How we make money
| Seller | Price | Type | Includes | Read | Link |
|---|---|---|---|---|---|
| 01E.ON NextIdeal Logic Combi2 24Kw | £2,260 | Fixed priceNo grant | IncludesQuote postcode: NG1 4BX | Read today, 01/11/2026 | Seller site |
| 02Boiler CentralViessmann Vitodens 050-W 25kW | £2,400 | Fixed priceNo grant | IncludesQuote postcode: NG1 4BX | Read today, 01/11/2026 | Seller site |
| Shown apart: other price types, other grant states and prices not checked recently. Not compared with fixed price prices | |||||
| BOXTIdeal Logic Combi 24kW | £1,760 | FromNo grant | IncludesNot stated | Read today, 01/11/2026 | Seller site |
| iHeatWorcester Bosch 2000 25kW | £2,295 | TypicalNo grant | IncludesFlue: Through a wall, Note: example installed price, Position: existing, Replacing: Combi boiler | Read today, 01/11/2026 | Seller site |
Read from 4 sellers on 01/11/2026. How we read prices
02Index
The weekly index
The median of one price type across the sellers read in the last 14 days, week by week.
Index not started
The index needs three sellers with one price type, each read in the last 14 days, and two weeks of it to draw a line. It starts here once the weekly runs have that.
03Grants
Grants that can pay towards it
Grants differ by nation: each one says where it applies.
04Like for like
What counts as this spec
A seller's price is matched by its stated size and scope, never by price.
A combi boiler of 24 to 27 kW replacing a combi, installed in the same place with a standard flue. Flush, magnetic filter, thermostat and warranty are recorded, not required. A new location, a system conversion or a back boiler removal is off the comparison.
A price for a different size or scope is stored with the date we read it but kept off this comparison. A price after a grant is never put beside one before it without saying so.
05Questions
Combi boiler swap, 25 kW: questions
- Combi boiler swap, 25 kW: how much does it cost?
- Combi boiler swap, 25 kW, read 01/11/2026: BOXT from £1,760; E.ON Next £2,260 fixed price; iHeat £2,295 typical; Boiler Central £2,400 fixed price. Fewer than three sellers share one price type, so no median yet.
- Which seller is cheapest?
- Combi boiler swap, 25 kW, fixed prices read in the last 14 days: E.ON Next is the lowest of 2 sellers at £2,260, read 01/11/2026.
- Is there a grant?
- Energy Company Obligation (ECO4) (pays for agreed work): England, Scotland and Wales only. Northern Ireland: none of the grants we track. Each grant page says who qualifies, checked on the official page.
- How are these prices read?
- From each seller's own website, once a week, with the date we read it. Every price says its type (from, fixed or typical) and whether a grant has been taken off. Commission never changes the order.
06Sources
Where these figures come from
- BOXTread 01/11/2026
- E.ON Nextread 01/11/2026
- iHeatread 01/11/2026
- Boiler Centralread 01/11/2026
- Energy Company Obligation (ECO4)checked 31/10/2026
- How we read prices