The SaunaBox® Forge is a precision-built outdoor sauna designed for those who take recovery and relaxation seriously. Wrapped in 100% Canadian hemlock with a matte black aluminum exterior, the Forge pairs architectural intention with year-round outdoor durability. A commercial-grade Harvia Vega Compact 3.5kW heater, full-length tempered glass door, color-selectable RGB ambient lighting, and an ergonomic S-shaped bench make every session a considered experience — not just a routine.
Why Customers Choose the Forge
- Commercial-grade Harvia Vega Compact heater — the same unit used in professional spa installations
- Reaches 170°F in approximately 25 minutes; up to 220°F in approximately 40 minutes
- Canadian hemlock interior stays cool to the touch even at full operating temperature
- Matte black aluminum exterior built for year-round outdoor exposure
- Full-length tempered glass door with matte black hardware for a clean, modern look
- Color-selectable RGB LED ambient lighting under the bench and overhead
- Active ventilation system with powered fan and dual intake/exhaust vents
- Elevated slatted wood flooring for drainage and barefoot comfort
- Complete accessory kit included: sauna rocks, water bucket and ladle, wooden foot stool
- Hardwired 240V installation — permanent, cord-free setup
Product Highlights
Harvia Vega Compact 3.5kW Heater
Finnish commercial-grade performance in a compact wall-mounted unit. The Harvia Vega Compact (Model #HCBU352401) is rated for spaces up to 175 cu ft and delivers consistent, even heat with minimal warm-up time.
Canadian Hemlock Interior
Light-toned, low-resin, and low-odor, hemlock is a preferred sauna wood for its stability and comfort. It stays cool to the touch at full operating temperature, making it safe and pleasant for extended sessions.
Matte Black Aluminum Exterior
The Forge's exterior is clad in matte black aluminum paneling over a cedar frame, engineered specifically for outdoor installation. It is designed to withstand rain, sun, and snow without compromising structural integrity.
Full-Length Tempered Glass Door
A floor-to-near-ceiling tempered glass door (1.65m tall) with matte black hinges and a Saunabox-branded horizontal pull handle provides a clean sightline and a premium entry experience.
Ergonomic S-Shaped Bench
The single bench features an S-shaped backrest contoured for extended, comfortable sessions. Bench height is 0.67m from the floor, with a 0.52m depth for full support.
Active Ventilation System
One powered fan (60W) combined with passive intake and exhaust vents maintains consistent airflow throughout each session, supporting a comfortable and well-regulated environment.
RGB LED Ambient Lighting
Color-selectable LED strips are positioned under the bench and overhead, allowing you to set the atmosphere for each session. Total lighting draw is 60W.
Elevated Slatted Wood Flooring
Raised slatted wood flooring promotes drainage and airflow beneath the cabin floor, keeping the interior dry and comfortable underfoot.
Specifications
Dimensions
| Exterior Height | 2.05 m / 80.71 in (6′ 8¾″) |
| Exterior Width | 1.10 m / 43.31 in (3′ 7⁵⁄₁₆″) |
| Exterior Depth | 1.05 m / 41.34 in (3′ 5⁵⁄₁₆″) |
| Interior Height | 1.85 m / 72.83 in (6′ 0¹³⁄₁₆″) |
| Interior Width | 1.00 m / 39.37 in (3′ 3³⁄₈″) |
| Interior Depth | 0.96 m / 37.80 in (3′ 1¹³⁄₁₆″) |
| Door Glass Height | 1.65 m / 64.96 in (5′ 4¹⁵⁄₁₆″) |
| Door Glass Width | 0.60 m / 23.62 in (1′ 11⁵⁄₈″) |
| Bench Height | 0.67 m / 26.38 in (2′ 2³⁄₈″) |
| Bench Depth | 0.52 m / 20.47 in (1′ 8½″) |
| Bench Slat Thickness | 6 cm / 2.36 in |
Electrical
| Heater | Harvia Vega Compact BU — 3.5 kW (Model #HCBU352401) |
| Voltage | 240V |
| Current Draw | 14.4A |
| Breaker | Dedicated double-pole (typically 20A — confirm with local electrician) |
| Wire Gauge | 14/2 copper conductor |
| Installation | Hardwired — must be installed by a licensed electrician |
| Cord/Plug | Not included |
| Alternative Config | Harvia Vega Compact 1.9 kW / 120V available (Model #HCBU1912241) — contact SaunaBox before ordering |
Power Draw
| Heater | 3,500W / 3.5 kW |
| RGB LED Lighting | 60W |
| Ventilation Fan | 60W |
| Total Peak Draw | ~3,620W |
Temperature & Airflow
| Max Operating Temp | 220°F (104.4°C) |
| Heat-Up to 170°F | ~25 minutes from cold start |
| Heat-Up to 220°F | ~40 minutes from cold start |
| Heater Capacity Rating | 70.5 – 175 cu ft (Harvia-rated) |
| Ventilation | Active — 1 powered fan + 2 passive vents (intake + exhaust) |
Materials & Finish
| Interior Wood | Canadian Hemlock |
| Exterior Cladding | Matte black aluminum paneling |
| Exterior Frame | Cedar |
| Door | Full-length tempered glass |
| Door Hardware | Matte black hinges + Saunabox-branded horizontal pull handle |
| Side Ventilation | Louvered black panel |
| Lighting | RGB LED strip (color-selectable) |
| Seating | Single bench with S-shaped ergonomic backrest |
| Flooring | Elevated slatted wood |
| Hardware Finish | Matte black throughout |
| Base | Raised feet for ground clearance |
Weight & Shipping
| Net Weight (assembled) | 214 kg / 471.8 lb |
| Gross Shipping Weight | 259 kg / 571.0 lb |
| Packaging | 1 consolidated plywood crate (~45 kg) |
| Crate Dimensions (L×W×H) | 216 × 151 × 96 cm / 85.0 × 59.4 × 37.8 in |
| Crate Volume | 3.131 m³ / 110.6 cu ft |
| Shipping Method | LTL freight |
| Handling | Forklift or 2-person team + pallet jack |
Ideal For
- Homeowners seeking a permanent outdoor sauna installation
- Athletes and active individuals who prioritize structured recovery routines
- Those with limited outdoor footprint who need a compact, single-user cabin
- Buyers who want a spa-quality heater without a full spa build-out
- Year-round climates — rain, snow, and sun-resistant construction
Important Information
- Electrical installation: The Forge requires hardwired 240V service. Installation must be performed by a licensed electrician. A dedicated double-pole breaker (typically 20A) is required. Confirm breaker sizing with your local electrician before installation.
- Delivery: This product ships via LTL freight. Delivery is curbside. A forklift or 2-person team with a pallet jack is required to move the crate from the delivery vehicle. Ensure site access is clear before scheduling delivery.
- Site preparation: The Forge must be placed on a level, stable surface capable of supporting 214 kg / 471.8 lb. Raised feet provide ground clearance for drainage and airflow — do not block the underside.
- Assembly: The unit ships in a single consolidated plywood crate. Some on-site assembly is required. Refer to the included installation guide.
- Alternative heater: A 1.9 kW / 120V heater configuration is available for locations where 240V service is not accessible. Contact SaunaBox before placing your order to arrange this configuration.
- Not for indoor use: The Forge is designed and rated for outdoor installation only.
Frequently Asked Questions
Does the Forge require a dedicated electrical circuit?
Yes. The Forge requires a dedicated 240V hardwired circuit with a double-pole breaker, typically rated at 20A. Installation must be completed by a licensed electrician. No cord or plug is included — this is a permanent hardwired installation.
How long does it take to heat up?
The Harvia Vega Compact 3.5kW heater reaches 170°F in approximately 25 minutes from a cold start, and up to 220°F in approximately 40 minutes. Actual heat-up time may vary based on ambient outdoor temperature.
Can the Forge be used outdoors year-round?
Yes. The Forge is built specifically for outdoor installation. The matte black aluminum exterior cladding over a cedar frame is designed to withstand rain, snow, and sun exposure across all seasons.
What is included with the Forge?
The Forge includes the sauna cabin, Harvia Vega Compact 3.5kW heater, sauna rocks, water bucket and ladle, and a wooden foot stool. Electrical wiring and installation are not included and must be arranged separately.
How is the Forge delivered?
The Forge ships via LTL freight in a single consolidated plywood crate. Delivery is curbside. You will need a forklift or a 2-person team with a pallet jack to move the crate from the delivery vehicle to your installation site. Ensure clear site access before scheduling delivery.
Is a 120V version available?
Yes. A Harvia Vega Compact 1.9 kW / 120V heater configuration (Model #HCBU1912241) is available for locations where 240V service is not accessible. Contact SaunaBox before placing your order to arrange this configuration.
What is the interior wood, and why does it matter?
The interior is lined with Canadian hemlock — a light-toned, low-resin, low-odor wood that stays cool to the touch even at full operating temperature. It is a widely used sauna wood valued for its stability, comfort, and clean appearance.
How many people does the Forge accommodate?
The Forge is designed as a 1-person sauna. The interior dimensions are 1.00m wide × 0.96m deep × 1.85m tall, with a single ergonomic bench. It is optimized for solo use.
The SaunaBox® Forge is built for those who want a serious, permanent outdoor sauna — not a temporary setup. If you are ready to invest in a dedicated recovery space, the Forge is engineered to deliver consistent performance season after season. Questions before ordering? Contact the SaunaBox team directly.
This product is intended for general wellness and relaxation use. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Consult a qualified healthcare provider before use if you have any health concerns or pre-existing conditions. Keep out of reach of children. Always follow the included safety and installation guidelines.