1 / 10 · Photo: Finnish Sauna Builders
Thermory
4 Person Square Sauna No 42 DIY Kit with Terrace and Window
$8,619best price, at Finnish Sauna Builders · 2 sellers, up to $8,619
- 4-person
- $2,155 per seat
- outdoor cube sauna
Prices checked Sep 29, 2026. Freight, wiring and a pad usually add more; the cost calculator totals them.
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Thermory 4 Person Square Sauna No 42 DIY Kit with Terrace and Window$8,619Shop at Finnish Sauna Builders The price ledger
Same product, 2 sellers
Cheapest first. Prices checked Sep 29, 2026; confirm freight and what's included before you buy.
Compare across brands
How it stacks up
 This oneThermory 4 Person Square Sauna No 42 DIY Kit with Terrace and Window |  Smartmak2-4 Person Outdoor Square Traditional Steam Sauna with Panoramic Glass Windows |  Leil SaunasBlack Cube Classic 4-Person Outdoor Sauna Kit |  Northern SaunasScandinavian Equinox Mini 4 Person Outdoor Cube Sauna (7x5) |  SaunaLifeCL7G Cube | |
|---|---|---|---|---|---|
| Lowest price | $8,619 | $8,999 | $7,990 | $7,899Lowest | $7,990 |
| Sold by | 2 sellers, up to $8,619 | Smartmak only | 13 sellers, up to $9,190 | Northern Saunas only | 29 sellers, up to $9,160 |
| Size | 4-person | 4-person | 4-person | 4-person | 6 person |
| Wood / material | spruce | canadian hemlock | thermowood | Thermally Modified Norwegian Spruce | Thermo-Spruce |
| Heater | 8 kW | Harvia SW60 Harvia SW80 Harvia SW80 Harvia SW80 | Not listed | Not listed | 8 kW |
| Exterior | Not listed | 79"W x 71"D x 83"H 98"W x 91"D x 83"H 134"W x 91"D x 83"H 157"W x 91 | W2184 × D1660 × H2224 mm | Not listed | 91" W × 86.6" D × 93" H (231 × 220 × 236 cm) |
| Every seller | Compare it | Compare it | Compare it | Compare it |
The details
4 Person Square Sauna No 42 DIY Kit with Terrace and Window
- Ships as a kit for on-site assembly
- Seats up to 4 people
- 8 kW heating output
- Available for 208/240V
- Made from spruce
- Capacity
- 3–4 Person
- Assembly
- DIY-friendly · pre-cut and pre-milled · no on-site cutting · ~1 day install
- Power
- 8 kW
- Voltage
- 208V/240V
- Wood / material
- spruce
What’s included
- Pre-cut and pre-milled body staves and wall panels
- Sauna cradles & metal banding
- Interior bench framework, backrest staves, duckboard flooring
- Tempered-glass front door
- All fasteners, adhesive roof tape, and hardware
- Heat shield, cable raceway
- Rain jacket and exterior trim package
- Step-by-step installation guide
Options
- Wood Finish and Configuration: Thermo Spruce — Sauna Solo
- Heater Bundles: No Heater (Bring Your Own), 8 kW Harvia KIP B + Stones, 8 kW Harvia KIP W + Stones + Fenix Ctrl, 8 kW Harvia Spirit + Stones + Fenix Ctrl, 6 kW Homecraft Revive Slim (Outdoor Wifi + Stones)
- Add-on: None, Under-Bench Lighting, Bucket, Ladle & Thermometer Package, Under-Bench Lighting + Bucket Ladle & Thermometer Package
From the sellers’ own product listings, checked 2026-10-01. Confirm specs with the seller before you buy.
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