What an infrared sauna is, and how it differs
A traditional sauna heats the air in the room, often to 70 to 90°C, and that hot air warms you. An infrared sauna does it the other way round: infrared panels emit radiant heat that your body absorbs directly, so you warm up at a much lower air temperature, roughly 45 to 60°C. You still sweat, your heart rate still rises, but the room itself never gets as fierce, which is why many people find they can sit comfortably for longer.
For a home buyer, three practical differences matter more than the physics. Infrared cabins heat up quickly and use less electricity overall, so they cost less to run. Most one and two person units are designed to plug into a standard socket rather than needing a hardwired heater, which makes them the easiest sauna to fit indoors. And because the air stays milder, they suit a spare room, garage or conservatory where a full steam sauna would be impractical. If you want the hotter, more intense traditional experience instead, that is the territory of an outdoor sauna, a garden sauna or a barrel sauna.
Near, mid, far and full spectrum
Infrared is split into wavelength bands, and cabins are sold on which ones they use. The boundaries vary a little by source, but the useful shorthand is:
Far infrared is the longest wavelength and the workhorse of most home cabins. It produces that deep, enveloping warmth and does most of the sweating work.
Near and mid infrared are shorter wavelengths, added by some cabins and marketed for skin and circulation. Keep any wavelength-specific health claims measured, as the evidence for them is thin.
Full spectrum means a cabin emits all three, usually through separate emitters, rather than far infrared alone.
Full spectrum is a genuine specification difference and it costs more, so it is worth understanding. It is not, however, a guarantee of better results. A well-made far-infrared cabin is the right choice for most homes, with full spectrum a considered upgrade rather than a default.
What the benefits actually are
Here is the honest position. Infrared saunas are relaxing and pleasant, and there are some promising health signals, but the infrared-specific evidence base is smaller and weaker than the evidence for traditional Finnish saunas. Some studies quoted for "saunas" in general actually used traditional saunas, not infrared, so the bigger claims deserve care. Graded honestly:
Relaxation and comfort: supported, as an experience. Warming the body at a milder air temperature is genuinely relaxing, and easier to tolerate for a longer, calmer session than intense steam heat.
A gentle cardiovascular load: promising. Heat makes blood vessels widen and heart rate rise, an effect one clinic likens to a moderate-paced walk, and small studies report modest blood-pressure and sleep benefits. The strongest cardiovascular evidence, though, comes from large observational studies of traditional sauna users, where cause and effect is not proven and a relaxed lifestyle may explain part of the signal.
Muscle recovery and pain: promising, not settled. Better circulation may aid recovery, and there is some evidence that regular use eases joint pain, but the studies are small.
Mood, stress and sleep: promising. Some evidence for lower stress and better sleep, again from small studies.
The measured summary is the fair one: studies have looked at high blood pressure, heart conditions and chronic pain and found some proof that saunas may help, but larger and more exact studies are needed to prove it. Enjoy an infrared sauna for how it makes you feel and as a gentle addition to recovery, not as a treatment.
What an infrared sauna will not do
Two claims are worth pushing back on directly. It will not "detox" you: the research is at an early stage, your liver and kidneys clear waste regardless, and sweat-as-detox is marketing. And it is not a weight-loss tool: any drop on the scales after a session is water lost through sweat, and it returns as soon as you rehydrate. An infrared sauna is also no substitute for sleep, food or exercise.
The specs that matter, and the EMF question
When you compare cabins, these are the specifications that make a real difference:
Heater type. Carbon panels are larger and give a gentler, more even far-infrared warmth; ceramic rods run hotter and more focused. Many cabins mix them, and full-spectrum cabins add near and mid emitters. The number and placement of panels affect how even the heat feels.
Power draw. One-person cabins typically draw about 1.3 to 1.5 kW and two-person cabins about 1.6 to 2.2 kW. Most one to two person units are designed to run from a standard 13 amp socket, which is a major convenience. Larger three to four person or full-spectrum cabins can need a dedicated circuit; verify the figure per model.
Capacity and size. One, two and three to four person cabins are all common. Match the size to your household, and check the internal dimensions if you want room to stretch out. A two-person cabin is the usual sweet spot for couples.
Materials and build. Cabin woods are usually hemlock or red or white cedar, with glass fronts common on compact models. A solid build and good door seal hold heat and last.
EMF. Infrared heaters run on electricity, so like any appliance they produce low-frequency electromagnetic fields, and many brands market "low-EMF" cabins with shielded wiring or particular heaters. No mainstream health authority has established harm from sauna EMF at these levels, and far infrared itself is gentle, non-ionising heat, not radiation in the harmful sense. Treat low-EMF as a feature some buyers value rather than a safety essential, and be wary of marketing that implies an ordinary sauna is dangerous.
On siting and wiring: infrared cabins are usually plug-in and are the simplest sauna to place indoors, on a level, dry floor with clearance and ventilation. Any fixed electrical work, such as a dedicated circuit for a larger cabin, is notifiable under Building Regulations Part P and must be done by a qualified electrician. Outdoor infrared cabins exist and may fall under permitted development in England subject to size and siting limits, with different rules in Scotland, Wales and Northern Ireland, so check your local planning authority. When the installation service launches, it will handle vetted fitting.
What an infrared sauna costs to buy and run
As a guide, UK infrared cabins start at about £1,800 for a compact one-person model. Most one to two person cabins sit between roughly £1,800 and £2,300, and larger three to four person or premium full-spectrum cabins climb into the several-thousand-pound bracket. Those are cabin prices, before delivery.
Running cost is one of infrared's main attractions. Most one to two person units draw about 1.3 to 2.2 kW. Take a 2 kW cabin over a 45-minute session: it pulls full power while heating, then cycles on the thermostat, so an upper-bound estimate is about 1.5 kWh a session. At an electricity unit rate of 26.32p per kWh, that works out at roughly 39p a session, or about £1.58 a week for four sessions. Real-world use is usually lower, because the heater cycles rather than running flat out.
Guide prices, correct as of July 2026, with running costs based on 26.32p per kWh (Ofgem price cap, 1 October to 31 December 2026). The energy price cap changes quarterly and varies by region, meter and tariff, so check current rates before budgeting. Guide prices are typical UK costs, not live prices.