4-5 Person HexSauna by Thunder Domes
Built in Chicago | Engineered for Performance | Inspired by Tradition
Introducing the 4-5 person HexSauna, our next-generation prefab outdoor sauna designed to deliver an authentic Nordic sauna experience in a space-efficient, easy-to-install package. Engineered in Chicago by Thunder Domes, the OctoSauna blends traditional Finnish sauna principles with modern building methods using SIP panel technology.
Key Features & Benefits:
Optimized Layout for Real Sauna Heat
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Designed with proper bench height and layout to ensure your feet stay above the heater stones, where the heat is.
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Full-body bench spacing (22" depth) and large interior allow for both seated and reclining use.
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Proper air gaps behind benches and cladding for natural convection and even heat distribution.
SIP Panel Construction for Easy Setup & Thermal Efficiency
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6 wall panels + 3 roof panels made from Structural Insulated Panels (SIPs), pre-assembled with:
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Vapor barrier
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Insulation
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Interior tongue-and-groove cedar
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Durable exterior finish
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Fasteners, trim, and pre-cut bench materials included.
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Typical assembly time: 3-6 hours with basic tools. One-person install possible.
High-Quality Materials
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Interior: Tongue-and-groove western red cedar for warmth, aroma, and moisture resistance
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Custom door with hand-built cedar frame, latch, and handle
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LED lighting beneath benches (included)
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Optional: 18"x18"" tempered glass window, exterior slatted cladding
Heating Options:
Choose your heat source based on your needs and electrical setup:
| Heater Type | Power | Max Temp | Notes |
|---|---|---|---|
| 120V Electric | 3kW | ~165°F | Standard outlet (slower heat-up) |
| 220V Electric | 9kW | 195+°F | Requires 40A / 220V breaker |
| Wood Pellet Stove | N/A | 195+°F | Off-grid ready, natural heat experience |
Specifications:
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Capacity: 4–6 persons
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External Dimensions: 6.3' x 9.6' x 7' tall
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Interior Dimensions: 5’-6” x 4’-9” x 7’
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Cubic Volume: ~300 cu. ft.
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Bench Size: 18″W x 79″L x 32″H
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Electrical:
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120V or 220V heater option
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Internal controller (electric models)
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Requires professional install for 220V
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What's Included:
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(6) Pre-fab SIP wall panels
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(3) Insulated roof panels
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(2) Cedar benches
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(3) Cedar deck foundation
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Handcrafted cedar door
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Corner trim kit
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Interior LED lighting
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Stainless steel fasteners & hardware
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Assembly guide + support
Installation Requirements
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Drill, ratchet/wrenches, clamps
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Flat level surface (concrete / gravel pad, patio, or platform)
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Extra hands recommended for roof panel placement
Delivery & Viewing
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Local delivery & installation available within 60 miles of Chicago (extra fees apply outside local range)
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Demo unit available for viewing near the United Center – contact us to schedule
Lead Time & Quote Request
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Current lead time: 3 weeks
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Fill out the form below to receive a customized quote
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Questions? Reach out anytime at shopthunderdomes@gmail.com
