SaunaLife Model S2B 2-Person Cold/Hot Immersion Tub

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Is the SaunaLife S2B right for you?

This is the only tub in your entire cold plunge/immersion lineup built around doing both hot and cold in one unit, rather than being a cold-only plunge. The Sun Home Cold Plunge models (Pro, Horizontal, Vertical) are cold-only, and the Dundalk Polar tub is cold-only too — if you want the option of a hot soak as well as a cold plunge without buying two separate products, this is the one built for that.

It arrives fully assembled — no barrel or panel construction required, just place, fill, and use — which also sets it apart from the Dundalk tub's more DIY-adjacent kit approach.

One thing to check before ordering: the tub itself is rated for hot-and-cold use, but like the Dundalk tub, the chiller is a separate selection on Select Saunas' page, not included by default. Make sure whichever chiller you pick actually supports both heating and cooling — otherwise you'd have a hot-and-cold-capable tub paired with a cold-only (or hot-only) chiller.

Who it's for: buyers who want one tub that does both cold plunge and hot immersion, without running two separate units.
What we like: genuinely dual-purpose (not just cold), fully assembled on arrival, ergonomic fiberglass interior rather than a flat-bottomed tub, matching stairs included for safer entry.
What to know before buying: confirm your chiller selection supports both hot and cold before checkout — it's not automatic just because the tub itself is rated for both. Also note the filled weight is 1,665 lbs — this needs a permanent, level spot, not somewhere you plan to move it after installation.

Key Features: Thermo-Pine exterior (2x cedar's lifespan), hot & cold functionality, 200-gallon ergonomic black fiberglass interior, seats up to 2, fully assembled, matching stairs included.

Specifications

• Exterior: 74.4"L × 46"W × 41"H
• Interior: 66.5"L × 39.1"W × 36" deep
• Water capacity: 200 gallons
• Filled weight: 1,665 lbs
• Shipping weight: 396 lbs

Free continental US shipping, fulfilled by Select Saunas. Select chiller and accessories on Select Saunas' page at checkout.