Sauna Buying Checklist: Everything to Consider Before You Buy

Sauna Buying Checklist: Everything to Consider Before You Buy

Buying a sauna is a significant purchase, and there are more decisions involved than most people expect. Size, type, heater, wood species, indoor vs outdoor, electrical requirements, foundation, accessories - the list adds up. This checklist walks you through every consideration so you don't end up with buyer's remorse or unexpected costs after the sauna shows up.

Print this out or bookmark it. Go through each section before you place an order.

Section 1: Location and Placement

Where you're putting the sauna drives many of the other decisions. Decide this first.

• Indoor or outdoor? Indoor saunas skip foundation and weatherproofing concerns but need adequate room dimensions and ventilation. Outdoor saunas need a foundation, weather-resistant construction, and an electrical run from your panel.
• Specific location identified? Measure the space. Account for door swing, clearance around the sauna (at least 6 inches on all sides for airflow), and ceiling height (7 feet minimum for most saunas).
• Local codes checked? Look up setback requirements, permit needs, and any HOA restrictions. See our outdoor sauna placement guide for details.
• Electrical panel assessed? Check that your panel has room for a 30-50 amp 240V breaker and note the distance from the panel to your sauna location.
• Foundation plan? For outdoor saunas, decide on gravel pad, pier blocks, or concrete slab. See our foundation guide.
• Delivery access confirmed? Can the delivery truck get close enough? Will the sauna or kit fit through gates, doorways, and hallways?

Section 2: Size and Capacity

Size your sauna based on how you'll actually use it, not the maximum number of people you could theoretically fit inside.

• How many people will typically use it at once?
  • 1-2 people: 4'x5' to 5'x6' (small saunas)
  • 3-4 people: 5'x7' to 6'x8' (medium saunas - most popular size)
  • 5-6 people: 6'x8' to 7'x9' (large saunas)
  • 7+ people: 8'x10' or larger (extra large)
• Do you want to lie down? Lying down requires at least one bench to be 6+ feet long. This means the sauna's interior needs to be at least 6.5 feet in one dimension.
• Bench configuration? L-shaped benches maximize seating in a compact footprint. Parallel benches work better for larger groups. Two-tier benches (upper and lower) give you temperature options within the same room.

Section 3: Sauna Type

• Traditional steam sauna or infrared? Traditional saunas (our recommendation) use a heater with stones, reach 150-185F, and let you throw water on the stones for steam (loyly). Infrared panels heat your body directly at lower air temperatures (120-150F). Traditional saunas deliver the full Finnish sauna experience.
• Kit, pre-built, or custom?
  • Kit: Pre-cut panels you assemble. Best value, 4-8 hour assembly. Browse our sauna kits.
  • Pre-built: Assembled and delivered as a unit. Zero assembly, higher cost. Check our outdoor saunas.
  • Custom: Built from scratch by a contractor. Most expensive, unlimited design flexibility.
• Shape preference? Cabin-style (rectangular box) is the classic. Barrel saunas are popular for outdoor use - they shed water naturally, heat efficiently, and look great. Pod and luna shapes are available from some manufacturers.

Section 4: Wood Quality

The wood determines how long your sauna lasts, how it looks, and how it smells.

• Species: Canadian hemlock, Western red cedar, and Nordic spruce are the most common sauna woods. Heat-treated (thermally modified) wood is superior for longevity and moisture resistance.
• Treatment: Is the wood heat-treated? This matters. Heat treatment removes moisture, improves stability, and increases natural rot resistance. All SweatDecks saunas use FSC-certified heat-treated Canadian hemlock.
• Certification: Look for FSC (Forest Stewardship Council) certification, which confirms the wood was responsibly sourced from sustainably managed forests.
• Wall thickness: Thicker walls mean better insulation. Look for at least 1.5" wall thickness for outdoor saunas. Barrel sauna staves are typically 1.5-2" thick.

Section 5: Heater Selection

• Heater type: Electric (most common for home use) or wood-burning (traditional, no electrical hookup needed). See our heater selection guide.
• Heater sizing: Calculate your room volume (L x W x H in feet) and match to the appropriate kW rating. Rule of thumb: 1 kW per 50 cubic feet of space. Check our heater sizing guide.
• Brand: We stock and recommend Harvia and Huum. Both are proven, well-supported brands with excellent track records. Browse our heater collection.
• Controls: Built-in dials (simple, reliable), separate wall panel (easier access), or app control (convenient but pricier).
• Stone capacity: Larger stone capacity means softer heat and better steam. Consider 40+ lbs if you enjoy throwing water on the stones.

Section 6: Electrical Requirements

• Voltage: Most heaters over 3kW require 240V. Small 1-2 person saunas may use 120V.
• Amperage: Check the heater's amp draw and ensure your panel can support it. Typical range: 30-50 amps.
• Electrician lined up? Get a quote before buying the sauna. Electrical costs ($200-$500) should be part of your total budget.
• Disconnect switch planned? NEC code requires a visible disconnect switch within line of sight of the sauna. Your electrician will handle this.

Section 7: Budget

Build a complete budget, not just the sauna unit cost.

See our detailed sauna installation cost breakdown for full numbers.

Section 8: Warranty and Support

• Warranty coverage: What's covered and for how long? Look for at least 1-2 years on the heater and 5+ years on the structure/wood.
• Parts availability: Can you get replacement heating elements, stones, and door hardware easily? Harvia and Huum both have excellent parts networks.
• Customer support: Does the seller offer phone/email support during assembly? This matters when you're mid-build with a question.
• Return policy: Understand the return window and who pays return shipping on a 500+ lb product.

Section 9: Accessories (Nice to Have)

• Sauna bucket and ladle (for steam)
• Thermometer / hygrometer
• Headrests and backrests
• LED interior lighting (if not included)
• Floor mat
• Sand timer
• Exterior wood stain (for outdoor saunas)
• Cold plunge tub for contrast therapy

Quick Decision Framework

If you're feeling overwhelmed, start here:

1. Indoor or outdoor? This narrows your options by half.
2. How many people? This determines the size.
3. Kit or pre-built? This sets your budget range.
4. Everything else follows from those three decisions.

Browse our full collection of outdoor saunas, barrel saunas, and sauna kits to see what fits your checklist. Every product listing includes dimensions, weight, heater specs, and everything else you need to make a confident decision.