Wood-fired vs electric sauna: costs, rules and practicalities (UK 2026)
Wood-burning and electric garden saunas compared on upfront price, installation, running costs, smoke control rules and day-to-day use, with real UK prices for the same saunas with each heater, checked in November 2026.
Quick answer
Where a retailer offers the same garden sauna with either heater, the wood-fired version cost £220–£1,400 more in the listings we checked, often because it includes a chimney. But wood needs no electrician, no new circuit and no electricity. Electric heaters are easier: set a timer, or use an app on some models, and there's no ash or smoke. A 6kW electric heater costs about £2.17 a session at the current price cap on our assumptions. Wood costs depend on your logs and stove, and we haven't measured them. In a smoke control area you can only burn wood in a Defra-exempt appliance; otherwise you're limited to authorised smokeless fuel.
Fire safety
Follow the stove maker’s installation instructions and clearances to the letter, including the chimney or flue. Fit a carbon monoxide alarm and never leave a lit stove unattended.
Same sauna, different heater: what it costs
Several retailers sell the same sauna with a choice of heater, which makes for a fair comparison. These are retailer prices from 10–11 November 2026:
| Sauna | Electric | Wood-fired | Difference |
|---|---|---|---|
| Steam & Oak Vaat 200 barrelAd (spruce) | £3,495 (Harvia Wall 6kW) | £3,715 (Harvia M3, with stainless chimney) | +£220 |
| Steam & Oak Ruutu 200 cubeAd | £7,925 (Harvia Cilindro 9kW) | £8,234 (Harvia M3, with insulated chimney) | +£309 |
| Polar Recovery Polar Cove with outdoor shower | £17,995.95 (9kW) | £18,995.95 | +£1,000 |
| Polar Recovery 6–8 person cubeAd | £8,599.99 (9kW) | £9,999.99 | +£1,400 |
Buying the stove separately, a chimney can cost more than the stove. At Aqualine Saunas, the Harvia M3 was £755 and Harvia’s steel chimney set £965. See best sauna heaters for more.
Installation
- Electric: a dedicated, hard-wired circuit from your consumer unit, installed by an electrician. In England, that’s notifiable under Part P. One electrician’s 2026 price guide puts running power to an outbuilding at about £700–£1,100 within 15m of the house and £1,200–£2,000 for 15–30m. See sauna electrical requirements.
- Wood: no electrics needed for the heater, so it suits a sauna far from the house. But the stove, flue and chimney must go in exactly to the maker’s instructions and clearances, and the chimney adds height (see planning permission).
Running costs
- Electric: about £2.17 a session for a 6kW heater at the Ofgem cap of 26.32p per kWh, on the method in our running-costs guide. That’s about £340 a year at three sessions a week.
- Wood: depends on the stove, the wood and how long you bathe, and we haven’t measured it. For a sense of price, Fire Guru listed about 1m³ of kiln-dried birch at £313.99 when we checked. Ask the stove supplier how much wood a typical session uses.
Smoke control areas and fuel rules
Many towns and cities in England have smoke control areas. GOV.UK says that in one, you can only burn wood in a Defra-exempt (approved) appliance, and this includes a chimney on a building such as a summerhouse; otherwise you can only burn authorised smokeless fuels. Check with your council, and check the stove is exempt before you buy if you’re in one.
Separately, wood sold in England in volumes under 2m³ must be certified Ready to Burn (20% moisture or less), under the Air Quality (Domestic Solid Fuels Standards) (England) Regulations 2020.
Day to day
| Electric | Wood-fired | |
|---|---|---|
| Starting it | Turn a dial or set a timer; some heaters have app control | Lay and light a fire, then feed it |
| Temperature control | Thermostat | Air control and how much wood you add |
| Mess | None | Ash to empty, logs to store |
| Neighbours | Nothing to see or smell | Smoke from the chimney |
| Power cut or off-grid | Won’t work | Works |
The third option: gas
Steam & Oak sells FinSteam propane heaters from £1,695 (Botnia 81, 8.1kW), and offers them on the Vaat 200 at £5,040. FinSteam rates them for barrels and other uninsulated rooms of up to about 8m³. They run from a standard 13kg propane bottle, and a fixed gas connection needs a Gas Safe registered engineer.
Which should you choose?
- Choose electric for convenience, timers and no smoke, especially in a town garden or a smoke control area.
- Choose wood for a sauna far from the house, off-grid use, or if you enjoy tending the fire and you’re not restricted by smoke control rules.
Frequently asked questions
Is a wood-fired sauna cheaper than electric?
To buy, usually not: the wood-fired version of the same sauna cost £220–£1,400 more in the listings we checked. But wood saves the electrician and new circuit (about £700–£2,000 for a garden sauna in one electrician's 2026 price guide) and the electricity (about £2.17 a session for a 6kW heater on our assumptions).
Can I have a wood-burning sauna in a smoke control area?
Only with a Defra-exempt (approved) appliance, or by burning authorised smokeless fuel. GOV.UK says this applies to chimneys on buildings such as summerhouses too. Ask your council whether you're in a smoke control area.
What wood should I burn in a sauna stove?
Dry wood. In England, wood sold in volumes under 2m³ must be certified Ready to Burn (20% moisture or less) under the Air Quality (Domestic Solid Fuels Standards) Regulations 2020. Follow the stove maker's fuel guidance.
Does a wood-fired sauna need planning permission?
It's assessed like any garden outbuilding, but the chimney counts towards the height, so check it stays within the limits, especially within 2m of a boundary. See our planning permission guide.
Is there a gas option?
Yes. Steam & Oak sells FinSteam propane heaters from £1,695, rated for barrels and other uninsulated rooms of up to about 8m³. A fixed gas connection needs a Gas Safe registered engineer.
Sources
We read each of these on or before 10–11 November 2026. Retailer links in this list are plain links, not affiliate links.
- Steam & Oak: Vaat 200 barrel sauna (heater options)
- Steam & Oak: Ruutu 200 thermowood cube sauna (heater options)
- Polar Recovery: Polar Cove sauna with outdoor shower
- Steam & Oak: FinSteam Botnia 81 gas sauna heater
- GOV.UK: smoke control areas, the rules
- legislation.gov.uk: Air Quality (Domestic Solid Fuels Standards) (England) Regulations 2020
- Fire Guru: kiln-dried birch logs, standard plus crate