SaunaBox® Forge 1-Person: Traditional Finnish Sauna

3.5kW Harvia® wall heater. 100% Canadian Hemlock interior. Black-tinted tempered glass door. FlowCore active convection ventilation. Weather-resistant construction for year-round outdoor use. Includes sauna rocks, bucket + ladle, ergonomic backrest, and foot stool.

The Forge is a traditional Finnish dry sauna — not an infrared cabin. A Harvia® 3.5kW wall heater warms the air and the sauna rocks to 220°F (104°C) at bench level; pour water over the rocks for a brief burst of steam (löyly) when you want it. The 1-person design keeps the footprint tight while the FlowCore active convection system pulls fresh air in at floor level and exhausts spent air at the ceiling — so the heat stays intense but the oxygen stays fresh. Built from 100% Canadian Hemlock with a black-tinted glass door and integrated ambient lighting, the Forge is a piece of backyard architecture engineered to endure rain, sun, and cold evenings year after year.

Specifications:

Heating

Type: Traditional Finnish Dry Sauna · Heater: Harvia® Vega Compact, 3.5 kW · Max Temp: 220°F (104°C) at Bench Level · Heat-Up: 170°F ~25 Min / 220°F ~40 Min (Cold Start) · Löyly: Water on Rocks for Burst Steam · Ventilation: FlowCore Active Convection — Floor Intake + Ceiling Exhaust

Dimensions

Interior: 39.4 × 37.8 × 72.8 in (1.00 × 0.96 × 1.85 m) · Standing Height: 6'2" · Capacity: 1 Person · User Weight: ~300 lb · Assembled Weight: 214 kg / 471.8 lb

Materials & Build

Interior: 100% Canadian Hemlock · Exterior: Matte-Black Aluminum + Cedar Framing, Weather-Resistant · Door: Black-Tinted Tempered Glass · Lighting: Integrated Ambient Interior Lighting · Placement: Indoor or Outdoor, Rated for Year-Round Outdoor Use

Electrical

Circuit: Dedicated 240V, Typically 20A Double-Pole Breaker · Operating Current: 14.4 A at Load · Installation: Hardwired — Licensed Electrician Required, Not Plug-In

Shipping & Assembly

Freight: LTL — Single Consolidated Plywood Crate · Gross Shipping Weight: 259 kg / 571 lb · Handling: Forklift or Pallet Jack Required · Assembly: ~1–2 Hours, 2 People Recommended, Basic Hand Tools

Warranty

Cabin: 2-Year Warranty — Frame, Cladding, Interior Wood, Door & Hardware · Heater: 1-Year Harvia Heater Warranty