Meet the Forge™ — a precision-built outdoor sauna crafted for those who take recovery seriously. Designed with architectural intention and wrapped in 100% Canadian Hemlock, Forge blends natural warmth with modern edge. Clean lines. Black-tinted tempered glass. Soft ambient lighting. Every detail is engineered to elevate the ritual.
The powerful 3.5kW wall-mounted heater reaches temperatures up to 220°F, delivering a deep, enveloping heat that rivals traditional spa-grade saunas.
Built for outdoor performance and year-round durability, Forge is weather-resistant and engineered to withstand the elements—rain, sun, and snow alike.
Key Features
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100% Canadian Hemlock Construction
Naturally aromatic, sustainably sourced, moisture-resistant, and built to last.
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Reaches Up to 220°F
Deep, immersive heat for serious sweat sessions.
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3.5kW Wall-Mounted Heater
Powerful, consistent performance.
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Black-Tinted Tempered Glass Door
Sleek privacy with a modern architectural feel
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Integrated Ambient Lighting
Soft illumination designed for a calming, refined atmosphere.
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Weather-Resistant Outdoor Design
Built specifically for exterior installation.
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Complete Accessory Kit Included
Sauna rocks, water bucket & ladle, and wooden foot stool.
Product Specifications
• Harvia Vega Compact 3.5 kW electric heater — Finnish commercial-grade, the same unit used in professional spa installations worldwide
• Heats to 170°F in approximately 25 minutes from a cold start
• Heats to 220°F in approximately 40 minutes from a cold start
• Full-length tempered glass door with matte black hinges and Saunabox-branded horizontal pull handle
• Matte black aluminum exterior paneling over a cedar frame — built for year-round outdoor use
• Canadian hemlock interior — light-toned, low-resin, low-odor wood that stays cool to the touch at full temperature
• Single bench with ergonomic S-shaped backrest for extended, comfortable sessions
• RGB LED ambient lighting (color-selectable) under the bench and overhead
• Slatted wood flooring — elevated for drainage and barefoot comfort
• Active ventilation system: 1 fan + 2 vents (intake + exhaust)
• Louvered black vent panel on the exterior for passive airflow
• Raised feet for ground clearance — promotes drainage and airflow underneath the cabin
• Hardwired 240V installation — no cords, no adapters, permanent setup
• Compact outdoor footprint: 1.10 m wide × 1.05 m deep (43.3 × 41.3 in)
• Matte black hardware throughout — hinges, handle, vent panel, and accessories
DIMENSIONS
Exterior
• External Height: 2.05 m / 6′ 8¾″ (80.71 in)
• External Width: 1.10 m / 3′ 7⁵⁄₁₆″ (43.31 in)
• External Depth: 1.05 m / 3′ 5⁵⁄₁₆″ (41.34 in)
Interior
• Internal Height: 1.85 m / 6′ 0¹³⁄₁₆″ (72.83 in)
• Internal Width: 1.00 m / 3′ 3³⁄₈″ (39.37 in)
• Internal Depth: 0.96 m / 3′ 1¹³⁄₁₆″ (37.80 in)
Door
• Door Glass Height: 1.65 m / 5′ 4¹⁵⁄₁₆″ (64.96 in)
• Door Glass Width: 0.60 m / 1′ 11⁵⁄₈″ (23.62 in)
Bench
• Bench Height (floor to top of bench): 0.67 m / 2′ 2³⁄₈″ (26.38 in)
• Bench Depth (front to back): 0.52 m / 1′ 8½″ (20.47 in)
• Bench Slat Thickness: 6 cm / 2.36 in
ELECTRICAL SPECIFICATIONS
• Heater: Harvia Vega Compact BU — 3.5 kW (Model #HCBU352401)
• Voltage: 240V
• Current Draw: 14.4A
• Breaker: Dedicated double-pole breaker (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 Configuration: Harvia Vega Compact 1.9 kW / 120V available (Model #HCBU1912241) — contact SaunaBox before ordering
POWER DRAW
• Heater (Harvia Vega Compact): 3,500W / 3.5 kW
• Lighting (RGB LED strip): 60W
• Ventilation fan: 60W
• Total peak power draw: ~3,620W
TEMPERATURE & AIRFLOW
• Maximum operating temperature: 220°F (104.4°C)
• Heat-up time to 170°F: ~25 minutes from cold start
• Heat-up time to 220°F: ~40 minutes from cold start
• Heater capacity rating: 70.5 – 175 cu ft (Harvia-rated for the 3.5 kW Vega Compact)
• Ventilation: Active — passive intake/exhaust vents plus powered fan circulation
• Fan count: 1 (60W)
• Vent count: 2 (intake + exhaust)
MATERIALS & FINISH
• Interior wood: Canadian Hemlock
• Exterior cladding: Matte black aluminum paneling
• Exterior framing: Cedar
• Door: Full-length tempered glass
• Door hardware: Matte black hinges + horizontal Saunabox-branded pull handle
• Side ventilation: Louvered black panel
• Interior lighting: RGB LED strip (color-selectable ambient)
• Seating: Single bench with S-shaped ergonomic backrest
• Flooring: Elevated slatted wood
• Hardware finish: Matte black throughout
• Base: Raised feet (ground clearance for drainage and airflow)
WEIGHT & SHIPPING
• Unit net weight (assembled product): 214 kg / 471.8 lb
• Gross shipping weight (product + crate): 259 kg / 571.0 lb
• Packaging: 1 consolidated plywood crate (~45 kg)
• Crate external dimensions (L × W × H): 216 × 151 × 96 cm / 85.0 × 59.4 × 37.8 in
• Crate shipping volume: 3.131 m³ / 110.6 cu ft
• Shipping method: LTL freight
• Handling requirement: Forklift or 2-person team + pallet jack
