Log Burner vs Gas — UK 2026 Cost & Running Comparison
Log burner vs gas fire vs gas central heating. The economics, the experience, and when each makes sense for UK homes in 2026.
Short answer
Per useful kWh, bought-in kiln-dried logs (about 10-15p) cost more than mains gas (about 9p at the Ofgem cap for October-December 2026), so a log burner is not a cheaper heat source on fuel alone. The log burner heats one room very well; central heating heats the whole house. Most UK owners use both: log burner for the main living space, gas central heating for the whole-house background.
Direct comparison
| Factor | Log burner | Gas fire |
|---|---|---|
| Install cost | £2,800-£5,500 typical UK | £500-£2,500 |
| Running cost per kWh | ~10-15p useful heat (bought kiln-dried logs) | ~9p useful heat (Ofgem cap 7.97p/kWh, Oct-Dec 2026) |
| Annual fuel cost (regular use) | £400-£770 wood | £270-£320 gas for the same heat (one room) |
| Maintenance | £60-£85/yr sweep + chimney check | £100/yr safety check (Gas Safe) |
| Lighting time | 20-30 min to full heat | Instant |
| Storage required | 3-4m³ wood store outdoors | None |
| Whole-house heating | Single room only | Whole house (with central heating) |
| Off-grid resilience | Yes — works in power cuts | Depends on boiler/system |
| Aesthetic / experience | Real flame, real wood | Effect flame (artificial) |
| CO2 footprint | Carbon-neutral if sustainable | Fossil fuel emissions |
Calculate your log burner install cost
UK 2026 typical: £2,800-£3,800 for a mid-range install. Use the calculator for a personalised estimate.
Open the calculatorWhen a log burner makes more sense than gas
- You value the “event” of operating it: for UK owners who enjoy the ritual of lighting, tending, and experiencing a real fire, the log burner is irreplaceable
- Off-grid resilience matters: the 2022-23 energy crisis made many UK homeowners aware that gas systems fail in power cuts; log burners don’t
- You can self-source wood: free wood from arborists, fallen trees, sawmill offcuts, or Freegle/Freecycle dramatically improves the economics
- You want aesthetic warmth: real flames, real wood smoke (subtle when operated correctly), real ritual — gas-effect fires don’t replicate this
- Rural / poorly-served gas areas: where main gas supply is unreliable or unavailable, log burners offer actual heating independence
When gas makes more sense
- Whole-house heating matters more than the room: gas central heating warms upstairs, kitchen, hallway — log burners only heat the room they’re in
- Lower install cost: gas fires £500-£2,500 vs log burners £2,800-£5,500
- You can’t source wood: petrol-station wood at £11/bag makes the running cost worse than gas
- Instant heat needed: gas fires turn on immediately; log burners need 20-30 minutes to reach operating temperature
- No storage space: 3-4m³ of wood storage outdoors is non-trivial. Flats and small properties may struggle
- You don’t want maintenance: gas fires need annual Gas Safe checks but no chimney sweeping
Hybrid approach — what most UK owners do
The pragmatic UK 2026 setup:
- Gas central heating as primary whole-house heating, particularly for upstairs and morning warm-up
- Log burner as supplementary heating in the main living space — used most evenings through winter, when you’d otherwise turn the gas thermostat higher
- Net effect: gas runs at a lower set point while the log burner delivers the ambient warmth in the room you’re actually in
This zoning effect is where any saving comes from. A widely repeated claim that the Energy Saving Trust puts the saving at about 10% of heating bills could not be traced to a current Energy Saving Trust publication, so we do not rely on it. It does match what r/DIYUK owners report about the practical economics.
Pair with these guides
- Log burner running cost — the full annual breakdown: firewood, sweep, consumables. Annual running cost →
- What size log burner do I need — the room vs whole-house decision starts with sizing. Sizing guide →
- Best wood for log burners — per-kWh wood cost depends heavily on where you source it. Firewood guide →
Frequently asked questions
Is a log burner cheaper to run than gas?
Per kWh, no. Bought-in kiln-dried logs cost about 10-15p per useful kWh (4.1 kWh/kg, £120-£220 per loose m³, 75-85% stove efficiency). Mains gas is 7.97p/kWh under the Ofgem cap for October-December 2026, about 9p per useful kWh through a boiler. A log burner heats one room well; gas heats the whole house. Any saving comes from zoning, not from the fuel price.
Should I replace my gas boiler with a log burner?
Almost certainly no. Log burners are excellent zonal heating for one room but won’t reliably heat upstairs or through closed doors. UK owners consistently report keeping the central heating boiler as primary heating and the log burner as supplementary 'feature room' heating. Replacing the boiler entirely with a log burner is uncomfortable for whole-house operation.
How much does a log burner save vs gas?
There is no reliable UK figure. A widely repeated claim that the Energy Saving Trust puts the saving at about 10% could not be traced to a current Energy Saving Trust publication. Any saving depends on how far you lower the whole-house thermostat while the stove heats the room you are in; on fuel price alone, bought logs cost more per kWh than gas in 2026.
Gas fire vs log burner — pure heating economics?
Gas fire is cheaper upfront (£500-£1,500 vs £2,800-£5,500 for a log burner) and cheaper to run per kWh at 2026 prices (about 9p useful heat vs 10-15p for bought logs). Gas wins on ease (no wood storage, no lighting). Log burner wins on aesthetic, off-grid resilience, and the 'event' of operating it.
How much would a log burner save me per year?
On fuel, probably nothing. Regular use burns £400-£770/year of logs to deliver roughly 3,000-3,500 useful kWh; gas would deliver the same heat to that room for about £270-£320 at the October-December 2026 cap. Add the £2,800-£3,800 installation cost and the financial case rests entirely on running the rest of the house cooler.