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The HIVE Flow is a high-efficiency wood-burning sauna heater combining minimalist Nordic design with advanced combustion engineering — ideal for medium to large saunas. Its patent-pending furnace construction directs the heat into the sauna rather than the chimney, resulting in more efficient performance, Perfect for a Hot and Steamy Sauna session
Features:
- Wood-burning operation for authentic sauna experience
- Eco-conscious, low-emission design with up to ~75% of firewood heat directed into the sauna rather than the flue
- Large sauna-stone volume (holds ~150 kg / 330 lb) for long-lasting, gentle steam
- Sleek stainless-steel construction, premium finish, expressive glass door for ambience
- Flexible installation: choice of back or top flue connection, standard or LS (extended) version
- Designed and engineered in Estonia by HUUM

HIVE Flow Specs:
Standard Model (≈ 9.8 kW)
- Sauna room volume: ~8–18 m³ (≈ 282–635 ft³)
- Power rating: 9.8 kW
- Stone capacity: ~150 kg (~330 lb)
- Weight: ~67 kg (~148 lb)
- Height: 884 mm
- Width: 526 mm
- Depth: 586 mm
- Firewood length: 300 mm (≈11.8 inches)
- Flue diameter: 114 mm (~4.5 inches)
- Safety distances: A = 150 mm, B = 500 mm, C = 826 mm
Mini / Other Versions
- Sauna room volume: ~6–14 m³
- Power rating: 8.5 kW
- Stone capacity: ~105 kg
- Weight: ~54 kg
- Dimensions differ slightly (Width ~450 mm, Depth ~493 mm)
Safety Distances:
The HIVE Flow heater requires minimum clearances from combustible surfaces of approximately 150 mm on sides (A), 500 mm front (B) and up to 826 mm rear/top (C) depending on the installation layout. These distances may be reduced using appropriate shielding—please refer to the installation manual.
Package Contents:
- HUUM HIVE Flow wood-burning sauna stove body
- Metal grate, ash grate & ash drawer
- Heat-resistant glove
- Cleaning hatches (2 pcs), metal fixing plates (2 pcs)
- Installation & operation manual
- Limited 5-year warranty
Respect for the Experience
The HIVE Flow heater is designed to deliver more than heat — it’s crafted to enhance the sauna experience. Its large stone mass supplies lasting warmth even after the fire has died down; the open design and glass door reveal the fire itself, creating ambiance. With its efficient use of fuel and low emissions, this heater is perfect for those who want both authentic sauna ritual and modern performance.

