The verdict first
The Clearlight Sanctuary 2 is one of the best-built 2-person infrared saunas you can buy, and the closest premium rival to the Sunlighten mPulse. You get full-spectrum heating, a Complete Limited Lifetime Warranty, low-EMF/ELF design (as Clearlight states it) and a cabin that runs on a 120 V supply. It costs $7,299 in basswood or $7,699 in mahogany on the official store (checked 2026-10-01). Buy it for build quality and warranty; do not buy it expecting proven health effects beyond what sauna bathing in general offers.
How does the Sanctuary 2 heat you?
Infrared saunas warm your body directly rather than heating the air to traditional-sauna levels. The Sanctuary 2 uses two heater types:
- Carbon-ceramic far-infrared heaters on the side and back walls, which do most of the heating.
- Two 500 W full-spectrum heaters on the front glass, which add near and mid infrared to the far-infrared output.
The interior is 47 × 44 × 74 inches with a 47 × 22 inch bench — comfortable for two adults. Outside it measures 52 × 48 × 77 inches and weighs 450 lb. It draws 2,250 W (18.75 A at 120 V), so it needs a 20 A outlet with a NEMA 5-20 plug; check this with an electrician before ordering. Extras include 96-LED chromotherapy lighting, Bluetooth speakers, app control and a reversible bench.
What does the evidence say about sauna?
The strongest data come from traditional Finnish saunas, not infrared cabins. In the Kuopio cohort of 2,315 middle-aged Finnish men followed for about 20 years, Laukkanen and colleagues found that men who used a sauna 4–7 times a week had substantially lower rates of fatal cardiovascular disease and all-cause death than once-a-week users (JAMA Internal Medicine, 2015, doi:10.1001/jamainternmed.2014.8187). That is an observational association: frequent sauna users may differ in other ways, and Finnish saunas run hotter (around 80°C) than infrared cabins. Infrared-specific trials are small and short. A fair summary: regular heat exposure is a reasonable, enjoyable habit with promising cardiovascular signals; specific claims about near-infrared "detox" or cellular effects in a home sauna are not established. For how heat fits a wider routine, see the longevity protocol.
What does it cost to own?
- Purchase: $7,299 (basswood) or $7,699 (mahogany), both $500 below list.
- Electrical: a 120 V / 20 A outlet; budget for an electrician if you do not have one.
- Running cost: at 2,250 W, a session with 15 minutes of pre-heating and 30 minutes of use is roughly 1.7 kWh at full draw — real use is lower once the heaters cycle. Clearlight does not publish a per-session cost.
- Warranty: Complete Limited Lifetime Warranty (read the terms for what is covered).
Is an infrared sauna safe?
For healthy adults, yes, with sensible limits. Start with 10–15 minutes and build up to 20–30. Drink water before and after — you will sweat and can get dehydrated or light-headed. Avoid alcohol before and during sessions. Ask a doctor first if you have heart disease, unstable blood pressure, are pregnant, take medication that affects heat tolerance, or have implanted devices. Get out at any sign of dizziness, nausea or palpitations, and stand up slowly afterwards.
Clearlight Sanctuary 2 vs alternatives
| Sauna | Price (from ONDA reviews) | What stands out | |---|---|---| | Clearlight Sanctuary 2 | $7,299 | Full-spectrum, lifetime warranty, 120 V | | Sunlighten mPulse | from ~$6,000 | Separately programmable near/mid/far | | Sun Home Equinox | ~$6,000 | Full-spectrum with chromotherapy and sound bundled | | SaunaSpace Faraday | ~$5,000 (tent) | Incandescent near-IR, Faraday-cage design |
Prices for the alternatives come from ONDA’s own reviews and may have moved; check the maker before buying. Head-to-heads: Sunlighten mPulse vs Clearlight Sanctuary 2 and Sun Home Equinox vs Clearlight Sanctuary 2.
Who should buy the Clearlight Sanctuary 2 — and who should skip
Buy if you want a premium full-spectrum cabin for two, value a lifetime warranty and solid build, and have space plus a 20 A circuit. Skip if you want per-wavelength programming (the mPulse fits better), if your budget is under $6,000, or if you mainly want a hotter traditional-sauna experience. More options in the best infrared sauna round-up.
Background reading
Background reading on the ideas behind heat exposure — mostly hypotheses, not effects shown in people.
- Longevity protocol: biological clock reset — where sauna slots into a reset routine
- HPA-axis control and cortisol regulation — the heat-shock side of the stress response
- Anti-entropy neural architecture — sauna as a daily anti-entropy stress dose