3 Person Indoor Saunas

Infrared vs. Traditional: What Actually Changes at This Size

At the 3-person size, the gap between infrared and traditional saunas gets more interesting than it is with smaller models. A 3-person traditional sauna heats the air to 150–185°F using an electric heater and sauna stones, and you can throw water on the stones for bursts of steam (loyly). That experience is closer to what you'd find in a Finnish sauna. A 3-person infrared model uses carbon or ceramic panels to heat your body directly at a lower air temperature, typically 120–150°F, which many people find more comfortable for longer sessions.

The SunRay Savannah HL300K and Aspen HL300K2 are our two 3-person infrared options. Both feature FAR infrared heaters with ultra-low EMF output and built-in Bluetooth audio. The Savannah is built from Canadian red cedar, while the Aspen uses hemlock at a lower price point. On the traditional side, the Southport 300SN, Westlake HL300LX, and Hampton 300TN each take a slightly different approach to bench layout and wood selection. The Hampton stands out with 2-tier seating and a taller 80-inch cabin height, which gives you proper heat stratification between the upper and lower benches.

If you want both technologies in one cabin, the Finnmark FD-5 Trinity XL combines full-spectrum infrared panels, a traditional steam heater, and red light therapy in a single 3–4 person unit. It's a different price tier at $8,995, but it removes the "which type should I pick" question entirely.

Choosing the Right 3-Person Indoor Sauna

Know your electrical requirements first

Traditional 3-person saunas require a dedicated 240V circuit, which means a licensed electrician will need to run a line to wherever you're placing the unit. Most indoor installs from an existing panel run $450–$900. Some infrared models at this size can still run on a standard 120V/20A circuit, but many step up to 240V to power the additional heater panels. Always check the product page for the specific model you're considering, and budget for electrical work if you don't already have a dedicated circuit in place.

Measure twice, including ceiling height

A 3-person indoor sauna typically runs about 59–71 inches wide, 42–47 inches deep, and 75–80 inches tall. That's manageable for most spare bedrooms, basements, or large closets. The dimension people forget is door swing and clearance. You'll want at least 24 inches of clear space in front of the door, and enough room around the exterior for airflow. The corner sauna layout is worth considering if your floor plan is tight.

Wood matters more than you'd think

You'll see three wood types across this collection. Hemlock is the most common, lightweight, and hypoallergenic with minimal scent. Red cedar adds a natural aroma and stronger moisture resistance. Hardwood (used in the Westlake HL300LX) delivers a more refined look with excellent durability. All three are standard in quality indoor saunas, so the choice comes down to whether you want scent, aesthetics, or value.

What's Included and What You'll Need

Every sauna in this collection ships as a complete kit with the cabin panels, benches, door, heater (infrared models) or heater-ready wiring (traditional models), and hardware. SunRay's traditional models don't include a heater, so you can pair them with the right unit for your preferences. Assembly is straightforward for two people with basic tools and typically takes 1–2 hours. The panels clip or buckle together, so no special carpentry skills are needed.

All orders over $200 ship free within the US, and financing is available at checkout through Shop Pay if you'd rather spread the cost. If you're comparing sizes, check our 2-person and 4-person indoor sauna collections. And if you want the deep dive on every decision involved, our complete sauna buyer's guide covers heater selection, wood types, electrical prep, and more.

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