HUUM HIVE Flow Mini Wood Burning Sauna Stove – 8.5kW

The HUUM HIVE Flow Mini is a high-efficiency, wood-burning sauna stove engineered to deliver powerful heat with minimal environmental impact. Featuring HUUM’s patent-pending furnace design , this stove directs up to 75% of the heat from firewood directly into your sauna , rather than letting it escape through the chimney. The result is faster heating, reduced wood consumption, and a more sustainable sauna experience.

Designed for sauna rooms from 212 to 494 cubic feet , the HIVE Flow Mini produces soft, long-lasting steam that creates a comfortable and relaxing bathing environment. Its large 231-pound stone capacity ensures even heat distribution and gentle, consistent löyly.

This model is available in two configurations:

• Standard Firebox for traditional in-room wood loading

• External Firebox (LS) with a firebox extension for loading wood from outside the sauna

Both versions offer the same powerful performance, efficiency, and premium HUUM build quality.

Key Features

• High-efficiency 8.5kW wood-burning sauna heater

• 75% heat-capture design for superior performance and lower wood usage

• Mild, long-lasting steam from large stone mass

• 231 lb stone capacity (7 boxes required, sold separately)

• Patent-pending furnace construction

• Low emissions and environmentally responsible design

• BImSchV and CPR certified for safety and compliance

• Top or rear flue connection

• Designed, engineered, and manufactured in Estonia

• 3-year residential / 1-year commercial warranty

Technical Specifications (Applies to Both Variants)

Specification Value

Kilowatt Rating 8.5 kW

Primary Fuel Wood

Maximum Firewood Length 12" (30 cm)

Sauna Room Size 212 – 494 cu. ft.

Minimum Room Height 75" (191 cm)

Flue Connection Top or Back

Stone Capacity 231 lbs (7 boxes required)

Width 17.7" (45 cm)

Height 34.8" (88 cm)

Variant Differences

Feature Standard Firebox External Firebox (LS)

Loading Style From inside the sauna From outside the sauna

Depth 21.1" (54 cm) 26.5" (67 cm)

Heater Weight 119 lbs (54 kg) 130 lbs (59 kg)

Shipping Weight w/ Stones 350 lbs (159 kg) 361 lbs (164 kg)