One of the first decisions every UK buyer faces when choosing a garden sauna is heater type: wood-fired or electric. Both have a loyal following, and both can deliver a genuinely excellent sauna experience — but they suit different gardens, different routines and different budgets. Here is how they actually compare for a British garden in 2026.
How Wood-Fired Saunas Work
A wood-fired sauna uses a wood-burning stove fitted with a stack of volcanic rocks that store and radiate heat. Water ladled onto the hot stones produces the classic burst of steam — löyly, in Finnish — that defines the traditional sauna experience. Wood-fired stoves require a properly installed flue and chimney, and the ritual of building and tending the fire is, for many users, part of the appeal rather than an inconvenience.
How Electric Saunas Work
An electric sauna uses a wall-mounted or corner-mounted heater — always a genuine Harvia unit in our range — with an electric heating element beneath a bed of sauna stones. A built-in thermostat and timer let you set a target temperature and have the cabin ready at a specific time, without any manual fire management. Power output is matched to your cabin's volume, typically ranging from 6kW for a small two-person cabin to 9kW or more for larger barrel and cube saunas.
Heating Time Compared
This is where the two options diverge most clearly:
- Electric (Harvia heater): Typically reaches a full sauna temperature of 80–90°C in around 30–45 minutes, consistently, regardless of the outdoor temperature.
- Wood-fired: Usually takes 45–60 minutes or longer to reach full temperature, and heat-up time varies with the quality and dryness of the firewood and the outdoor conditions.
If you want to decide on a sauna session spontaneously after work on a weekday evening, the predictability of an electric Harvia heater is hard to beat. If your sauna sessions are more of a planned weekend ritual, the longer wood-fired warm-up is rarely a drawback.
Running Costs Compared
An electric sauna's running cost is simply the electricity used by the heater during heat-up and the session itself — at typical UK domestic rates, this works out to a modest cost per session, comparable to running a couple of hours of household heating. A wood-fired sauna has no electricity cost, but you will need a reliable, ongoing supply of dry, seasoned hardwood, and the cost of firewood — plus dry storage space for it — should be weighed against the electricity saving.
Which Suits the British Climate Best?
The UK's damp, changeable weather is a genuine factor in this decision:
- Electric saunas heat reliably even in winter, on a wet, cold January evening, without needing dry firewood on hand — a practical advantage given how often UK weather makes wood storage tricky.
- Wood-fired saunas need a covered, ventilated area to keep firewood dry, which is entirely achievable in a British garden but does require planning ahead, especially through autumn and winter.
For most UK gardens, especially those without a dedicated log store already in place, an electric Harvia heater is the lower-friction choice for regular, year-round use.
Maintenance and Practicalities
Electric heaters have very few moving parts and require minimal maintenance beyond occasionally replacing the sauna stones. Wood-fired stoves need the flue swept periodically and ash cleared after use, and — because they involve an open flame — should be sited and installed in line with building regulations for flue clearance from combustible surfaces. We advise on this during the ordering process for every wood-fired model we supply.
Our Recommendation
There is no universally "better" option — only the better option for your garden. Choose electric with a Harvia heater if you want fast, predictable, low-maintenance heat-up for regular midweek use. Choose wood-fired if the ritual of building a fire is part of why you want a sauna in the first place, and you have a dry, sheltered spot to store firewood. Every SAUNADO cabin — electric or wood-fired — is Finnish-made, built from spruce or thermowood, and comes with a full manufacturer's warranty.
Compare wood-fired and electric models in our full range: https://saunado.eu/en/collections/all
Not sure which is right for you? Email sales@saunado.eu and we will talk you through it.