Infrared Sauna Electrics UK: 13A Plug or Dedicated Circuit?
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Updated July 2026. The most practical pre-purchase question, and the one with the least clear information online: what electrical supply does an infrared sauna actually need in a UK home? Here's the straightforward guide — what plugs in, what needs a dedicated circuit, and what the rules say.
The Quick Answer
Most 1–2 person infrared saunas plug into a standard UK 13-amp socket — no electrician, no new wiring. Larger 3–4 person cabins and high-output full-spectrum models typically need a 20-amp dedicated circuit installed by a registered electrician. We confirm the exact requirement for any model before you order.
Why 13 Amps Is the Dividing Line
A standard UK plug socket supplies up to 13 amps at 230 volts — about 3 kW of continuous power. Compact infrared cabins draw 1.5–2.2 kW, comfortably inside that limit, which is why they're genuinely plug-and-play. Once a cabin's heater array pushes past roughly 2.5–3 kW — typical for 3–4 person cabins and larger full-spectrum arrays — running it from a plug socket isn't appropriate, and it moves to a dedicated circuit.
What Plugs In vs What Needs Wiring
| Cabin type | Typical draw | Supply needed |
|---|---|---|
| 1 person | 1.5–1.8 kW | Standard 13A socket |
| 2 person | 1.8–2.2 kW | Standard 13A socket (most models) |
| 3 person | 2–2.5 kW | Usually 20A dedicated circuit |
| 4 person | 2.5–3 kW | 20A dedicated circuit |
| Traditional sauna (comparison) | 6–10 kW | Dedicated high-amperage supply |
Getting a Dedicated Circuit Installed
A new 20-amp circuit is a routine job for a registered electrician: a dedicated run from your consumer unit to an isolator or outlet by the sauna. Budget roughly £150–£400 depending on the cable run and your consumer unit's spare capacity. In England and Wales, adding a new circuit is notifiable work under Part P of the Building Regulations, so use an electrician registered with a competent-person scheme (NICEIC, NAPIT and similar) who can self-certify — they handle the paperwork. This is not a DIY job.
Practical Points Worth Knowing
Don't run a cabin from an extension lead. Continuous 2 kW loads and coiled extension cables are a bad combination — the cabin should plug directly into a wall socket. Check spare socket capacity. If the sauna shares a ring with a tumble dryer or heater that runs at the same time, put it on a different circuit. Garages and outbuildings: fine for indoor cabins as long as the space is dry — if the garage supply is a single spurred socket, have an electrician confirm it's suitable for a continuous load. Outdoor cabins need an armoured outdoor supply run by an electrician as standard — see our outdoor infrared range.
What This Means for Choosing a Cabin
If you want zero electrical work, choose from the 1 person and 2 person ranges — they plug in and run the day they arrive. If you're going bigger, factor the electrician visit into your budget and timeline; it's a half-day job, not a project. Every product page lists the requirement, and you can always call us on 0330 133 6617 to confirm before ordering. Running costs are the same story in miniature — modest — covered in our running costs guide.
FAQs
Can you plug an infrared sauna into a normal socket UK?
Yes — most 1–2 person infrared cabins draw 1.5–2.2 kW, well within a standard 13-amp socket's capacity. Larger cabins need a 20-amp dedicated circuit.
Do I need an electrician for an infrared sauna?
Not for most 1–2 person cabins — they plug straight in. For 3–4 person cabins needing a dedicated circuit, yes: in England and Wales a new circuit is notifiable under Part P, so use a registered electrician.
How much does sauna wiring cost in the UK?
A 20-amp dedicated circuit typically costs £150–£400 installed, depending on the cable run from your consumer unit.
Can I run an infrared sauna from an extension lead?
No — plug the cabin directly into a wall socket. Continuous 2 kW loads on extension leads are a fire risk, especially coiled cables.