How to choose a sauna & cold plunge

Infrared vs. traditional

Infrared cabins use carbon (and in some models “full-spectrum”) panels that warm you more directly. Cabins in this guide list maximum temperatures around 140–150°F, heat up on household current, and have no rocks or water.

Traditional (Finnish) saunas heat the air with an electric or wood-burning stove over rocks; you can pour water on the rocks for steam (löyly). They typically need more power (or a chimney, for wood) and are the classic choice for outdoor barrels and cabins.

Neither is “better” — it's a preference for the feel of the heat, the install you can support, and budget.

Indoor vs. outdoor

Indoor cabins go in a spare room, basement or garage on a flat, level floor; they're protected from weather and easy to reach in winter.

Outdoor saunas (barrels, pods, cabins) become a backyard feature but need a foundation, weather exposure planning, and usually a longer electrical run. Indoor infrared models in this guide are indoor-only unless the brand says otherwise (Enlighten sells separate outdoor-rated versions).

Size & capacity

• Brand “person” ratings assume people sitting fairly close; if you want to stretch out, size up one.
• Measure the room and every doorway, stair turn and hallway on the delivery path — panels arrive flat, but some are large and heavy.
• Leave clearance around the cabin per the manual (some brands will check your room dimensions before you buy — SunRay offers this).

Electrical & installation

• 120V plug-in: smaller infrared cabins (e.g., SunRay 2-Person) state they run on a standard household outlet.
• 120V dedicated circuit: many 3–4 person infrared cabins need a circuit nothing else shares; Enlighten's 2–3 person indoor models specify 20A minimum (30A recommended) with a NEMA 5-20P plug.
• 240V: larger cabins (LuxSauna D-Lux 4 at 220V; Enlighten SIERRA-5 at 220/240V with NEMA 6-20P) and most electric traditional heaters. As simple arithmetic, a 6 kW heater on 240V draws about 25A before code-required sizing.
• Use a licensed electrician, pull permits where required, and follow the brand's manual and local code. Electrician costs are typically not covered by warranties (LuxSauna states this explicitly).

Space & foundation (outdoor)

• Outdoor saunas need a flat, level, well-drained base — common choices are a concrete pad, pavers on compacted gravel, or a deck rated for the load. LeisureCraft offers floor plates and an adjustable installation base as options on some models.
• Check weight: the LeisureCraft CT MiniPOD crate alone is listed at 1,403 lb.
• Check HOA rules, setbacks, and whether your town requires a permit for an accessory structure or wood-burning stove/chimney.

Wood types

• Western Red Cedar — aromatic, naturally rot-resistant; used by Enlighten, SunRay's cedar models and LeisureCraft's Dundalk line.
• Eastern White Cedar — lighter color, tighter grain, subtler scent; LeisureCraft's Canadian Timber line. The brand says both are naturally resistant to moisture and decay.
• Canadian Hemlock — light, low-aroma; used by LuxSauna and SunRay's entry 2-person model. Often preferred by people who don't want a cedar smell.

EMF (electromagnetic fields)

Infrared brands commonly advertise “low EMF” or “zero EMF.” Treat these as brand claims: the pages we reviewed don't publish standardized measurements or test conditions. For example, LuxSauna's D-Lux 2 page says both “Low EMF” and “zero EMF.” If EMF matters to you, ask the brand for third-party test reports, measurement distance and method.

Chiller vs. ice

• Ice works for occasional use with any tub but means repeated ice runs, and water warms back up between sessions.
• A chiller holds a set temperature continuously. Penguin's chillers in this guide list a 37–100°F range on 120V at 3.9A; the brand estimates running cost “as low as $18/month” at $0.12/kWh (a brand estimate — your rate, climate and lid use will change it).
• All-in-one plunges pair tub, chiller, lid and filtration so you aren't sourcing parts.

Plunge maintenance

• Keep the filter clean; Penguin says its pump should run continuously and advises against timers.
• Use a lid between sessions — it keeps debris out and reduces heat gain.
• Sanitize and change water per the manufacturer's directions; Penguin notes not to use an ozone venturi or a filter finer than 50 microns with its Cold Therapy Chiller.
• Below freezing: Penguin's Cold Therapy Chiller must be disconnected and drained when ambient temps reach 32°F or below.
• Place on a surface that can handle water and condensation.

Warranties — read the fine print

• Compare structure and heater/electrical coverage separately: SunRay lists 10-yr structural / 1-yr parts & electronics; LuxSauna lists limited lifetime room components / 5-yr heaters & electrical; LeisureCraft lists 5 years on sauna packages; Penguin's chiller includes 1 year with optional 2- or 3-year extensions.
• Look for exclusions (normal wear, improper install, electrician costs), transferability, and whether coverage is limited to the contiguous US.

Delivery: LTL freight

• Most saunas and plunges ship by LTL freight on a pallet, usually curbside. SunRay lists free curbside freight with liftgate to the lower 48; Enlighten lists free shipping within the continental US under its current promotion.
• Plan who will move boxes from curb to install spot (several Enlighten models ship 675–1,150 lb).
• Inspect before you sign. Count boxes, check for crushed corners or punctures, photograph damage, and note it on the delivery receipt — then contact the seller right away.

Total cost of ownership

• Up front: unit + any shipping + sales tax + electrician/permit + foundation (outdoor) + accessories (lid, mat, towels, cover).
• Ongoing electricity: kW × hours × your rate. Illustration only: a 1.665 kW cabin for 1 hour (incl. warm-up) × 16 sessions/month ≈ 27 kWh — about $4.50/month at an assumed $0.17/kWh, before thermostat cycling.
• Plunge upkeep: filters (Penguin lists replacement filters from $7.99), sanitizer, water changes, chiller electricity.
• Later: heater/control replacement out of warranty, wood care (oils/stains), moving or reinstall.

Before you order

• Measured the install spot, ceiling height and clearances
• Measured every door, hallway and stair turn on the delivery path
• Confirmed voltage, amperage and plug/receptacle type in the manual
• Got an electrician's quote (dedicated circuit / 240V / GFCI as needed)
• Outdoor: chosen and priced a level foundation; checked HOA/permits
• Plunge: chosen a spot that tolerates water and condensation
• Read the full warranty: structure vs. heater, exclusions, transferability
• Confirmed the current price, shipping method and any liftgate fee

Delivery day & after

• Helpers or equipment ready to move heavy boxes
• Counted boxes against the bill of lading
• Photographed and noted any damage before signing
• Contacted the seller about damage the same day
• Registered the warranty (LeisureCraft has an online form)
• Kept the manual and serial numbers somewhere safe
• Set a filter-cleaning and water-care routine for the plunge
• Winter plan for any outdoor chiller (drain below freezing if required)