3 Person Indoor Saunas

What size sauna suits 3 people indoors?

A 3 person indoor sauna is a cabin its maker sizes for three people, though some makers in this collection give a range instead of one number: SunRay, for one, rates the Aspen for three but says the Hampton comfortably accommodates 2–3 bathers. On the Kohler C1 kit and the ThermaSol Lumaria, the seat count follows the size you order: the C1 comes in sizes for up to 2, 3 or 5 people in Bathing Brands' listing, and the Lumaria in ThermaSol's Medium, for 2–3 people, or its Large, for 4–5.

Outside, the 3 person indoor saunas whose size this page gives measure 59 to 85.4 inches wide and 42 to 85.4 inches deep. At the top of that span sits ThermaSol's Astra, 85.4 by 85.4 inches, whose specification sheet adds the 2-inch air gap ThermaSol requires around the cabin's unfinished sides. SunRay lists 55 inches of inside width for the Aspen and Savannah, and Finnmark's manual gives the FD-5 70.5 inches, so of those three, choose the FD-5 if three adults want the most room side by side.

3 person indoor saunas compared

For a 3 person indoor sauna, read the Maker's seats column against how many people will bathe together most days:

• Three adults most days: choose a model its maker rates for three or more or, on the C1 or the Lumaria, a size made for at least three.
• Two regular bathers, with room for a third: a 2–3 rating suits you.
• A fourth bather now and then: look for a rating that reaches four, as Dundalk LeisureCraft gives the Element Studio and Finnmark the FD-5 Trinity XL.

3 person indoor saunas by heat source

A 3 person indoor sauna in this collection gets its heat in one of four ways, and the way decides who chooses the heater:

• Far infrared: the SunRay Aspen and Savannah. SunRay builds eight carbon nano heaters into each, which its manual calls far-infrared heater elements, and the manual gives these saunas an adjustable range of 64–140°F. Choose one for infrared sessions, the cedar Savannah or the hemlock Aspen; other infrared models at this size are in 3 person infrared saunas.
• Electric heater included: SunRay, Kohler and ThermaSol. SunRay ships each of its traditional saunas with a Harvia heater, Bathing Brands lists a FERO heater with stones and a heater guard in the Kohler C1 kit, and ThermaSol includes a 9 kW Harvia Virta in its three cabins here. SunRay says the Southport's heater produces temperatures up to 170°F and the Westlake's up to 180°F, and ThermaSol makes the Virta adjustable up to 194°F. Choose from this group to have the heater come with the sauna, picked by its maker.
• Heater package: the Dundalk Element Loft and Studio. Dundalk LeisureCraft builds the Element models from Thermo Grandis, a thermally modified wood, for electric sauna heaters only, and Topture sells each with three packages to choose from: a HUUM DROP 6 kW with the UKU Wi-Fi control in black, marked Recommended, and two Harvia KIP 6 kW kits with stones, one with built-in controls and one with Wi-Fi digital controls. Choose one of these two to pick the heater and its controls yourself.
• Infrared and a heater in one: the Finnmark FD-5 Trinity XL. Finnmark equips the FD-5 with Spectrum Plus heaters, whose output Finnmark gives as mid and far infrared, and with a Harvia KIP45B sauna heater; Bathing Brands includes Harvia AC3000 sauna stones with the cabin. Steam, in Finnmark's account, is water splashed onto the heater's rocks. For red light, the cabin has a Spectrum Red Light LED panel, which Finnmark's specification puts at 650 nm. Choose the FD-5 for infrared sessions and stone heat in one cabin; the type has its own page, indoor hybrid saunas.

Weighing infrared against an electric heater for a room in the house is what how to choose an indoor sauna walks through, and heater-and-stones saunas at this size, indoors and out, are compared in 3 person traditional saunas.

How much does a 3 person indoor sauna cost?

Starting prices for a 3 person indoor sauna in this collection, each product's lowest current price, run from $3,296 for the SunRay Aspen to $23,604 for the ThermaSol Astra. SunRay's five cabins fill the lower end of that range, the Finnmark FD-5 and the two Dundalk Element models sit in the middle, and the Kohler C1 kits and ThermaSol's three cabins make up the upper end.

Apart from the Dundalk Loft and Studio, whose heater package is chosen on the product page, the price shown for a 3 person indoor sauna here already covers its heat source, so price the two Dundalk models with the package you pick. Freight within the contiguous United States is included on 10 of the 13, and freight for ThermaSol saunas is quoted per order. Compare them on the price shown plus any heater package, the ThermaSol freight quote and the electrical work your room needs.

120 V outlet or 240 V circuit: powering a 3 person indoor sauna

Plan the wiring for a 3 person indoor sauna around how it is heated. SunRay lists the Aspen and Savannah for 110–120 V, and its pages say each needs its own dedicated outlet on a circuit nothing else shares; SunRay lists a 20 A circuit for the Aspen, and its 2023 data sheet gives the Savannah 120 V, 20 A.

SunRay asks for a dedicated 220–240 V circuit, the kind an electric dryer uses, for each of its traditional saunas here. Kohler specifies 220–240 V on a single dedicated circuit for every C1 size, and ThermaSol specifies a 240 V single-phase supply, also on a dedicated circuit, for its three cabins here.

On the FD-5 Trinity XL, Finnmark gives 18.8 A on 240 V for its 4.5 kW Harvia KIP45B heater, marks the heater "Electrician Required" and leaves its circuit to the licensed electrician working from Harvia's manual, and Bathing Brands lists 208 V three-phase operation as available too. For the infrared side of the FD-5, check its electrical needs with Topture's team before booking the electrician. The Dundalk Loft and Studio take their electrical requirements from whichever heater package you pick, and that package's manual lists them.

If the room can offer only a 120 V outlet, start with the Aspen and Savannah. Your licensed electrician sizes the breaker and wire from the sauna's manual, the heater's manual where the sauna has a stone heater, and your local code.

Room, ceiling and floor for a 3 person indoor sauna

Check the ceiling height before you choose a 3 person indoor sauna for a basement. SunRay's five cabins here stand 75 to 80 inches tall, Finnmark gives the FD-5 83.1 inches and asks for at least 3 inches of clearance above it and on all sides, and Dundalk lists every Element model at just over 88 inches. Under a low ceiling, measure at its lowest point and start with the SunRay cabins.

The makers of these 3 person indoor saunas set their own room conditions. SunRay's indoor infrared pair needs a dry spot with a fairly level floor, plus a floor separator where the floor is damp; Finnmark wants its FD saunas on a solid surface somewhere dry; Kohler sites the C1 indoors with access to conditioned air; ThermaSol's sheets place its cabins indoors in a dry, climate-controlled space; and Dundalk designs the Element Collection for indoor use. A garage or an attic is among the locations Finnmark suggests for its FD saunas, while Kohler's and ThermaSol's conditions rule out a space that is neither heated nor cooled.

For a 3 person corner sauna, Topture files both Kohler C1 kits under its Corner feature, and ThermaSol builds the Astra with a corner layout and a glass-panel front; for corner designs in general, see corner saunas.

Getting a 3 person indoor sauna delivered and assembled

Delivery of a 3 person indoor sauna from this collection is curbside, by freight, on an appointment booked with you; the Bill of Lading needs the signature of an adult (18 or older), and most deliveries have a liftgate. Raise site-access questions before you order, from the curb to the room where the sauna will stand.

How a 3 person indoor sauna reaches the room depends on its maker. SunRay boxes its pre-built panels in cartons on a wooden pallet, and by SunRay's account the boxes clear any doorway at least 24 inches wide; Kohler's C1 Readiness Guide has the kit arriving on one or two large pallets, broken into sections that are easy to carry along corridors and through doorways inside the house; and Bathing Brands says ThermaSol's three cabins here arrive flat-packed on a flatbed trailer, and that the freight company offloads them at a residential address, with no forklift or loading dock needed. Dundalk LeisureCraft ships the Element models as ready-to-assemble panels, and its shipping terms leave unloading to the buyer, not the trucking company; Bathing Brands ships Finnmark's FD saunas on a wooden pallet.

SunRay pre-assembles every sauna at the factory, then breaks it down for shipping, and two people lock the panels back together with a Phillips screwdriver or a drill with a Phillips bit, with no contractor; SunRay puts its indoor infrared models at under an hour. ThermaSol's installation manuals call for 2 to 4 people on its three cabins here, Kohler says the C1 needs at least two and recommends a professional installer, and Finnmark's manuals state "Professional installation required" for the FD saunas, with at least two people. For a build by two people with hand tools, start with SunRay; plan on a professional for the FD-5, where Finnmark requires one, and weigh one for the C1, as Kohler recommends.

A 3 person indoor sauna from Topture ships under full-value freight protection, one of the buying terms the indoor saunas page sets out, so a part found broken and noted on the Bill of Lading at delivery is replaced. To spread the cost, eligible U.S. customers can pay with Shop Pay Installments on orders up to $30,000: monthly financing over 3, 6, 12, 18, or 24 months at 0–36% APR, depending on the purchase amount and eligibility, with the available plans shown at checkout.

Two seats, four seats or a second opinion: next steps for a 3 person indoor sauna

Before settling on three seats, check who will use the sauna most days and what is still undecided:

• Never more than two bathers: compare 2 person indoor saunas.
• Four bathers, or more room for three: browse 4 person indoor saunas.
• Infrared or an electric heater still open: the 60-second sauna finder suggests a starting point from a few answers, and Topture's Lifetime Expert Support goes over ceiling height, circuits and heater packages with you by phone at (833) 419-1774, live chat or email at contact@topture.com.

Reviewed October 2026