Comparisons
Infrared vs traditional sauna: the differences that decide it
One heats the air until the air heats you; the other skips the air entirely. Cost, installation, feel and evidence, compared without a side to sell.
Buyers who regret their sauna almost never bought a bad one; they bought the wrong heat. Traditional and infrared cabins share a word and almost nothing else, from wiring to what a session feels like, and the £2,000 to £6,000 in play deserves the differences laid out straight. Here they are, one decision at a time.
The whole difference in one table
| Traditional | Infrared | |
|---|---|---|
| Air temperature | 80–100°C | 30–65°C |
| How it heats you | Stove heats air and stones; air and steam heat you | Panels radiate heat your body absorbs directly |
| Session shape | 10–20 minute rounds with cool-downs | 30–45 continuous minutes |
| Steam | Löyly off the stones | None |
| Electrics | Dedicated 32–40A circuit, electrician required | Standard 13A socket indoors |
| Cost per session | About £1.57 at 6kW | About 42p at 1600W |
| Heat-up | 30–40 minutes (45–60 wood-fired) | 10–15 minutes |
| Entry price, complete | £1,999 outdoors | £399 blanket, £1,500 cabin |
Session costs use the Ofgem cap for July to September 2026, which sets electricity at 26.11p per kWh on a standard variable tariff. Swap in your own rate and the ratios hold.
How each one actually makes heat
A traditional stove heats a mass of stones, the stones heat the air to 80–100°C, and you sit in that air until sweat does its work. Water thrown on the stones flashes to steam, and that löyly wave is the sensory centre of the whole tradition. Verdict: this is the sauna of saunas, and nothing panel-based imitates it.
Infrared panels emit radiation your skin absorbs directly, so your body warms while the air stays at a temperature you could read a book in. The cabin is ready in 10 to 15 minutes and draws hundreds of watts rather than kilowatts. Verdict: it is not a cooler version of the same thing, it is a different instrument, and judged as one it is excellent at its own job.
Installation: a circuit against a socket
Every traditional electric stove hard-wires to a dedicated circuit, 32A at 6kW, run from the consumer unit as notifiable work under Part P by a registered electrician, at £300 to £800. Wood fire trades the circuit for a flue and tending. An indoor infrared cabin plugs into the wall and is assembled in minutes, which is why it is the only sauna type that suits a rental. Verdict: infrared wins installation outright, and it is not close.
Running cost: 42p against £1.57
A 6kW stove uses about 6 units across a heat-up and an hour's use; a 1600W panel cabin uses about 1.6 units in a full session. At three sessions a week that is roughly £245 a year against £66, and the £179 gap compounds for nightly users. Verdict: infrared, by a factor of four, and the gap widens outdoors in winter where stove cabins fight the wind.
What the evidence says about each
The long-run cohort research behind sauna health claims, including a 20-year JAMA Internal Medicine study of 2,315 Finnish men, was conducted in hot traditional saunas, and the wider evidence for heat bathing is strongest there simply because that is where the data is. Infrared's own trial literature is younger and smaller, pointing at heart function, chronic pain and fatigue. Both heats raise core temperature and heart rate, the shared mechanism researchers credit. Verdict: traditional holds the deeper evidence base; neither has a clinical crown.
Outdoors changes the answer
In the garden the gap narrows. Panel heat outdoors needs a weatherised shell and hardwired supply, so outdoor infrared cabins start at £3,171 and lose the plug-in advantage, while complete stove cabins on the main outdoor ranking start at £1,999 with the heater included. Indoors the positions reverse: a spare room takes a plug-in infrared cabin from £1,500 with no building work at all, while a traditional cabin still wants its circuit. Verdict: outdoors leans traditional, indoors leans infrared, and budget decides the exceptions.
Who should buy which
- Buy traditional for the löyly ritual, shared 90°C sessions, and the garden cabin as a destination
- Buy infrared for nightly 40-minute decompression, running cost in pennies, rentals and spare rooms
- Buy both heats in one building only if the household is genuinely split; hybrid cabins exist at £5,569 with two circuits
- Buy neither on health claims alone: frequency of use is the variable the research rewards
The two heats also sit at different points in the six decisions that pick a sauna: heat type is decision one precisely because it settles wiring, placement and budget before a single brand is compared.
Frequently asked questions
Is infrared as good as a real sauna?
It is a different instrument doing a different job. It matches the parts people measure, sweat, heart-rate rise, relaxation, at lower temperatures and cost, and it cannot reproduce löyly or the 90°C hit.
Which is cheaper to run, infrared or traditional?
Infrared, by about four times: roughly 42p a session at 1600W against £1.57 for a 6kW stove at the current cap rate. Over three sessions a week that is £66 against £245 a year.
Do infrared saunas need an electrician?
Indoor cabins, no: they run from a standard 13A socket. Outdoor infrared cabins and every traditional stove hardwire to dedicated supplies installed by a registered electrician.
Which is better for health?
The deep cohort evidence comes from traditional Finnish saunas; infrared's trial base is younger and smaller but points the same general direction. Both raise core temperature and heart rate, and neither is medicine.
Can you throw water on an infrared sauna?
No. There are no stones and no steam; panels make dry radiant heat only. If the water moment matters to you, that alone settles the choice in favour of traditional.
Which heats up faster?
Infrared is ready in 10 to 15 minutes. An electric stove takes 30 to 40 minutes and a wood burner 45 to 60 with tending, which is why traditional owners run timers and infrared owners do not bother.
Is infrared safe every day?
Daily use is common and the gentler temperatures make it easy to tolerate. The standard cautions hold for both heats: hydrate, skip alcohol, and anyone pregnant or managing a heart condition should ask a GP first.
Can infrared saunas go outside?
Only purpose-built outdoor models with weatherised shells, which start around £3,171. An indoor infrared cabin placed outside fails quickly and voids its warranty.
Why do gyms use traditional saunas?
Shared sessions at high heat suit a changing-room schedule, the stove keeps temperature through constant door-openings, and the format is what members expect. Home buying runs on different constraints, which is why infrared thrives there.
Can I get both in one sauna?
Hybrid outdoor cabins run a stove and 3.5kW of panels in one building, at £5,569 in our outdoor infrared ranking, with separate 30A and 20A circuits. They suit split households and nobody else.