Custom Indoor Sauna Room - 3' x 4' x 8'
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Book a quick video consult and ask us about electrical, placement, heater options, delivery, or assembly.
Book a video meetingPrefer email? Contact info@saunass.com
Specifications 3' × 4' · For 1-2 people · 3 woods
The Custom Indoor Sauna Room 3' x 4' x 8' is a pre-cut, choose-your-wood Finnish sauna kit for a 3' × 4' room with an 8' ceiling.
Power: Choose from 2 3.5-4.5 kW heaters (all include sauna stones), or order with No Heater. See the heater comparison on this page for specs and pricing.
What's in the box Pre-cut interior · you supply the shell
Everything for the 3' × 4' interior, pre-cut in your chosen wood. You supply the framing, insulation, electrical wiring, and exterior wall covering.
In the box
- Foil vapor barrier for moisture protection
- 1×4 tongue & groove boards for walls & ceiling, in your chosen wood
- Clear 1×4 bench boards (20″ deep) with supports, custom-built to your bench layout
- Ergonomic backrests and a comfortable headrest
- Corner moldings for walls, ceiling, and baseboards (matching wood)
- All-glass sauna door with wood handles and trim
- Duckboard flooring for the walk area (matching wood)
- Upper and lower vent grills for air circulation
- Traditional sauna bucket with liner and ladle, plus a sauna thermometer
- Marine-grade, wall-mount, vapor-proof sauna light
- Detailed installation instructions
What you provide
Good to know
Optional add-ons if selected: a heater (sauna stones included), bench skirting, and LED under-bench lighting (Skirting, LED, or Luxury accessory package).
Setup questions? Email info@saunass.com
Choose your wood 3 premium woods · cedar, thermo poplar, aspen
Every Custom Indoor Sauna Room is cut from one of three premium woods. The kit and price are the same - pick the look, feel, and finish you want.
-
Grade A Western Red Cedar Most popular
- Treatment
- Natural softwood, knot-free
- Feel
- Stays cool to the touch
- Color
- Reddish to pinkish-brown with pale streaks
- Durability
- Naturally resists moisture & decay
- Use
- Indoor
- Best for
- Classic cedar look & aroma
-
Thermo Aspen / Alder
- Treatment
- Intense thermal mod (419°F+)
- Feel
- Smooth, cool surface
- Color
- Deep, rich brown
- Durability
- Maximum stability & durability
- Use
- Indoor & outdoor
- Best for
- Modern, dramatic aesthetic
-
Thermo Poplar
- Treatment
- Medium thermal mod (374°F)
- Feel
- Warm, gentle surface
- Color
- Warm, even rich tone
- Durability
- Great stability, humidity-resistant
- Use
- Indoor
- Best for
- Chemical-free, balanced value
All three woods are cut to your exact room size. Thermo Aspen/Alder is also rated for outdoor use; Western Red Cedar and Thermo Poplar are for indoor saunas.
Compare sizes 21 sizes · find your fit
Every Custom Indoor Sauna Room is the same pre-cut, choose-your-wood kit. Pick the footprint that fits your room and how many people you want to seat.
| Width | Length | Height | People | Price | Choose |
|---|---|---|---|---|---|
| Width3' | Length4' | Height8' | 1-2 people | $5,190.50 | This size |
| Width4' | Length4' | Height8' | 1-2 people | $5,747.40 | View |
| Width4' | Length5' | Height8' | 2-3 people | $6,323.90 | View |
| Width4' | Length6' | Height8' | 2-3 people | $6,900.50 | View |
| Width5' | Length5' | Height8' | 2-3 people | $6,935.20 | View |
| Width4' | Length7' | Height8' | 3-4 people | $7,477.10 | View |
| Width5' | Length6' | Height8' | 3-4 people | $7,566.20 | View |
| Width4' | Length8' | Height8' | 3-4 people | $8,053.70 | View |
| Width5' | Length7' | Height8' | 3-4 people | $8,197.20 | View |
| Width6' | Length6' | Height8' | 4-6 people | $8,312.00 | View |
| Width5' | Length8' | Height8' | 4-6 people | $8,828.20 | View |
| Width6' | Length7' | Height8' | 4-6 people | $9,197.40 | View |
| Width6' | Length8' | Height8' | 4-6 people | $9,882.80 | View |
| Width7' | Length7' | Height8' | 4-6 people | $10,060.30 | View |
| Width6' | Length9' | Height8' | 6-8 people | $10,691.30 | View |
| Width7' | Length8' | Height8' | 6-8 people | $10,800.20 | View |
| Width6' | Length10' | Height8' | 6-8 people | $11,357.00 | View |
| Width7' | Length9' | Height8' | 6-8 people | $11,540.00 | View |
| Width8' | Length8' | Height8' | 6-8 people | $11,853.50 | View |
| Width7' | Length10' | Height8' | 8-10 people | $12,279.80 | View |
| Width8' | Length9' | Height8' | 6-8 people | $12,647.80 | View |
Every size ships pre-cut to fit and includes the all-glass door, benches, vents, duckboard floor, and trim. Wood finish and heater are chosen separately.
4.5 kW heater options
Compare heater options
Two compact heaters sized for smaller rooms. Both include sauna stones and WiFi control.
| Heater | Best value Harvia KIP45W+$2,261.00 |  HUUM Cliff Mini+$3,647.00 |
|---|---|---|
| Power | 4.5 kW | 3.5 kW |
| Control | WiFi app | WiFi app |
| WiFi app | Yes | Yes |
| Stone capacity | Standard | Standard |
| Design | Wall-mounted | Stone tower |
| Safety railing | No | Included |
| Best for | Lowest price, app control | Designer stone-tower look |
Sauna stones are included with every heater. A safety railing is included with select heaters. The price shown is added to the base price when you select a heater, or choose No Heater to supply your own.
