Expert help that stays with you

Small details become expensive problems once installation begins. We ask the questions early, so a mismatched part, an overlooked requirement or an installation issue gets caught while it is still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have built saunas from the crate up and both run saunas at home. New customers and existing Sauna Marketplace sauna and heater owners can Open the 3D planner.

Includes

What Is Included

HIVE FLOW

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

330 lb stones (quantity 10 × 33 lb 2 to 4 in stones boxes).

HIVE FLOW LS

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

330 lb stones (quantity 10 × 33 lb 2 to 4 in stones boxes).

HIVE FLOW MINI

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

231 lb stones (quantity 7 × 33 lb 2 to 4 in stones boxes).

HIVE FLOW MINI LS

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

231 lb stones (quantity 7 × 33 lb 2 to 4 in stones boxes).

Contents vary by configuration. Check the row for the option selected above.

Technical Specifications

Technical Specifications

At a Glance

At a Glance
Heat Source

Wood-burning

Mounting

Floor-standing

Warranty

3 years home use, 1 year commercial use (HUUM Limited Warranty v4)

Made in

Estonia

Model & Application

Model & Application
Brand

HUUM

Catalog Product

HUUM HIVE Flow Wood-Burning Sauna Stove | Mini, Full & LS

Heater Type

Wood-burning sauna stove

Model Number

9.8 kW: HIVE FLOW; 9.8 kW: HIVE FLOW LS; 8.5 kW: HIVE FLOW MINI; 8.5 kW: HIVE FLOW MINI LS

SKU / Part Number

9.8 kW: H1015012; 9.8 kW: H1016012; 8.5 kW: H1017012; 8.5 kW: H1018012

Sauna Sizing

Sauna Sizing
Maximum Room Volume

9.8 kW: 635 ft³; 8.5 kW: 494 ft³

Minimum Room Volume

9.8 kW: 282 ft³; 8.5 kW: 212 ft³

Electrical

Electrical
Rated Power

9.8 kW: 9.8 kW; 8.5 kW: 8.5 kW

Dimensions & Weight

Dimensions & Weight
Assembled Dimensions

9.8 kW: 20.7"W x 24.8"D x 34.8"H; 9.8 kW: 20.7"W x 29.5"D x 34.8"H; 8.5 kW: 17.7"W x 21.1"D x 34.8"H; 8.5 kW: 17.7"W x 26.5"D x 34.8"H

Heater Depth

9.8 kW: 23.07 in; 9.8 kW: 27.8 in; 8.5 kW: 19.41 in; 8.5 kW: 24.13 in

Heater Height

34.8 in

Heater Weight

119 lb

Heater Width

9.8 kW: 20.71 in; 8.5 kW: 17.72 in

Minimum Host-Room Height

74.17 in

Product Weight

9.8 kW: 148 lbs; 9.8 kW: 161 lbs; 8.5 kW: 119 lbs; 8.5 kW: 130 lbs

Installation Clearances

Installation Clearances
Ceiling-Clearance Reference Height Above Finished Floor

34.8 in

Ceiling-Clearance Reference Plane

Stove Top

Front Clearance

19.68 in

Rear Clearance

5.91 in

Left-Side Clearance

5.91 in

Right-Side Clearance

5.91 in

Combustible-Floor Base Ventilation Gap

1.18 in

Combustible-Floor Protection Front Depth

15.75 in

Combustible-Floor Protection Minimum Width

9.8 kW: 16.54 in; 8.5 kW: 14.96 in

Combustible-Floor Protection Side Extension

3.94 in

Combustible Side Clearance

5.91 in

Minimum Installation Envelope Width

9.8 kW: 32.52 in; 8.5 kW: 29.53 in

Noncombustible Wall Clearance

1.97 in

Top of Rocks Above Finished Floor

34.8 in

Through-Wall Installation (LS models)

Through-Wall Installation (LS models)
Wall Opening, Minimum

HIVE Flow LS: 19 in wide x 22 in tall from the floor. HIVE Flow Mini LS: 17 in wide x 22 in tall. With the Protective Bedding the height becomes 24.2 in.

Non-Combustible Wall Section, Minimum

25.6 in wide x 41.3 in tall from the floor; 43.3 in tall with the Protective Bedding.

Mounting Collar

HUUM Mounting Collar for HIVE Flow LS (large) or HIVE Flow Mini LS (small), designed for installation through a non-combustible wall; sold separately.

Installation

Installation
Flue Outlet Diameter

4.49 in

Included & Required

Included & Required
Included Components

Sauna Stove Metal Grate Heat Resistant Glove Splints Metal Fixing Plates (2) Ash Grate Cleaning Hatches (2) Ash Drawer Installation and Operational Manual

Required, Not Included

9.8 kW: 330 lbs stones (Qty 10 x 33 lbs 2 to 4 in stones boxes); 8.5 kW: 231 lbs stones (Qty 7 x 33 lbs 2 to 4 in stones boxes)

Certifications

Certifications
Certifications & Listings

Bimschv 2, CE

Warranty

Warranty
Residential Warranty

3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

Use the attached current manual and a qualified installer for final sizing, wiring, clearances, venting, and local-code compliance.

How It Fits

How This Product Fits the System

What it is used for

A wood-burning sauna heater that heats the room and stone mass for traditional löyly. Treat the stove, chimney, floor protection, clearances, combustion air, ventilation, and stones as one installation system.

What to plan

  • LS through-wall: the firebox extension passes through a non-combustible wall section at least 25.6 in wide x 41.3 in tall with an opening at least 19 in wide (Flow LS) or 17 in wide (Flow Mini LS) x 22 in tall from the floor; the Protective Bedding raises the opening height to 24.2 in. Use the matching HUUM Mounting Collar.
  • Size from adjusted sauna volume, including the effect of glass, masonry, and other uninsulated surfaces; do not size from floor area alone.
  • Match the selected model's power or fuel, voltage, phase, circuit, wire, control, stone, and venting requirements before ordering.
  • Treat clearances, ceiling reference planes, ventilation, guarding, floor protection, and service access as one room-layout decision.
  • Follow the current installation manual and use a qualified installer.

Required separately

Complete the system with these items.

Designed to work with

Model-specific replacements and compatible system components.

Optional accessories

Optional upgrades and accessories.

Attachments
Legacy manuals for older installations

Use these only when the document revision matches the installed product.

Gallery
Fast and Free Shipping!

Delivered thoughtfully from Illinois through our freight partners.  Deliveries typically take 12-16 days within the continental US.

HUUM HIVE Flow Wood-Burning Sauna Stove | Mini, Full & LS

HUUM HIVE Flow is the current high-efficiency wood-stove family, using a staged combustion path to transfer more heat into the sauna and stones before exhaust reaches the chimney. Choose 8.5 kW Mini or 9.8 kW full-size models, each available in standard or LS through-wall loading versions, for rooms from 212 to 635 cubic feet.

LS firebox pass-through: Flow LS and Flow Mini LS load through a noncombustible wall. The chimney route is a separate choice. The wall opening and noncombustible surround depend on the model, mounting collar and protective bedding. Use the drawings for your exact combination in the HUUM US stove manual, page 10, and the HUUM mounting-collar instructions when using a collar.

Build Your Quote:

Price range: $2,898.00 through $3,221.00

Add the required stones: HIVE Flow Mini / Mini LS

The HIVE Flow Mini and Mini LS holds about 231 lb of 2 to 4 inch stones, and stones do not come in the box with the heater. That comes to 7 boxes. Stack them loosely so air can move between them, and plan on restacking once a year.

I already have the approved 2–4 inch stones for HIVE Flow Mini / Mini LS I already have the approved 2–4 inch stones for HIVE Flow Mini / Mini LS 7 × 33-lb boxes of HUUM STONES 24 (231 lb supplied) +$560.00 7 × 33-lb boxes of HUUM STONES 24 (231 lb supplied)(+$560.00)
Add the required stones: HIVE Flow / Flow LS

The HIVE Flow and Flow LS holds about 330 lb of 2 to 4 inch stones, and stones do not come in the box with the heater. That comes to 10 boxes. Stack them loosely so air can move between them, and plan on restacking once a year.

I already have the approved 2–4 inch stones for HIVE Flow / Flow LS I already have the approved 2–4 inch stones for HIVE Flow / Flow LS 10 × 33-lb boxes of HUUM STONES 24 (330 lb supplied) +$800.00 10 × 33-lb boxes of HUUM STONES 24 (330 lb supplied)(+$800.00)
Mounting Collar for LS Stoves

Required for fire box pass through for Flow LS and Mini LS HUUM Stoves

None Stainless Steel +$416.00 Flat Black +$472.00
HUUM Cage

Add additional rocks surrounding the pipe above your stove for even greater thermal efficiency, steam surface area, and – because it’s cool!

None Stone Cage for HIVE Series Sauna Stoves, fits 88 lbs of rocks. +$396.00 Stone Cage With 99 LBS of Rocks +$636.00 Double Stone Cage with 198 LBS of Rocks +$1,272.00
Chimney
None Euro 4.5" to USA 6" Pipe Adapter to Source Local Chimney +$105.00 HUUM Through Ceiling Chimney Kit +$1,342.00 HUUM Barrel or Flat Roof Chimney Kit +$1,559.00 HUUM Through Wall Chimney Kit +$1,670.00
Protective Floor Plate
None Protective Floor Plate for HIVE Flow Series Sauna Stoves +$647.00 HUUM HIVE Protective Bedding with Leveling Feeet +$517.00
Protective Floor Plate
None Protective Floor Plate for HIVE Flow Series Sauna Stoves +$647.00 HUUM HIVE Protective Bedding with Leveling Feeet +$647.00
Protective Floor Plate
None Protective Floor Plate for HIVE Flow Series Sauna Stoves +$647.00 HUUM HIVE Protective Bedding with Leveling Feeet +$400.00
Protective Floor Plate
None Protective Floor Plate for HIVE Flow Series Sauna Stoves +$647.00 HUUM HIVE Protective Bedding with Leveling Feeet +$562.00
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Installation checklist, manuals and support

Keep the selected model and required components together before your installer starts.

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HUUM HIVE FLOW 3d animation

Marketplace Knowledgebase

6 Videos

Current HUUM product guide

Use the current Product Guide and Manuals & Documents sections on this page for verified model selection, sizing, installation, and warranty information.

Safety Clearances

HUUM Safety Clearances
Why buy a HUUM Sauna Heater from Sauna Marketplace?
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Reviews from owners

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★★★★★

Great service.

Dennis A.✓ Verified buyerReview on SaunaMarketplace.com

Planning guides: Sauna heater calculatorWood sauna stove guide

Expert help that stays with you

Small details become expensive problems once installation begins. We ask the questions early, so a mismatched part, an overlooked requirement or an installation issue gets caught while it is still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have built saunas from the crate up and both run saunas at home. New customers and existing Sauna Marketplace sauna and heater owners can Open the 3D planner.

Includes

What Is Included

HIVE FLOW

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

330 lb stones (quantity 10 × 33 lb 2 to 4 in stones boxes).

HIVE FLOW LS

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

330 lb stones (quantity 10 × 33 lb 2 to 4 in stones boxes).

HIVE FLOW MINI

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

231 lb stones (quantity 7 × 33 lb 2 to 4 in stones boxes).

HIVE FLOW MINI LS

Included with purchase

Sauna stove metal grate heat resistant glove splints metal fixing plates (2) ash grate cleaning hatches (2) ash drawer installation and operational manual.

Required separately

231 lb stones (quantity 7 × 33 lb 2 to 4 in stones boxes).

Contents vary by configuration. Check the row for the option selected above.

Technical Specifications

Technical Specifications

At a Glance

At a Glance
Heat Source

Wood-burning

Mounting

Floor-standing

Warranty

3 years home use, 1 year commercial use (HUUM Limited Warranty v4)

Made in

Estonia

Model & Application

Model & Application
Brand

HUUM

Catalog Product

HUUM HIVE Flow Wood-Burning Sauna Stove | Mini, Full & LS

Heater Type

Wood-burning sauna stove

Model Number

9.8 kW: HIVE FLOW; 9.8 kW: HIVE FLOW LS; 8.5 kW: HIVE FLOW MINI; 8.5 kW: HIVE FLOW MINI LS

SKU / Part Number

9.8 kW: H1015012; 9.8 kW: H1016012; 8.5 kW: H1017012; 8.5 kW: H1018012

Sauna Sizing

Sauna Sizing
Maximum Room Volume

9.8 kW: 635 ft³; 8.5 kW: 494 ft³

Minimum Room Volume

9.8 kW: 282 ft³; 8.5 kW: 212 ft³

Electrical

Electrical
Rated Power

9.8 kW: 9.8 kW; 8.5 kW: 8.5 kW

Dimensions & Weight

Dimensions & Weight
Assembled Dimensions

9.8 kW: 20.7"W x 24.8"D x 34.8"H; 9.8 kW: 20.7"W x 29.5"D x 34.8"H; 8.5 kW: 17.7"W x 21.1"D x 34.8"H; 8.5 kW: 17.7"W x 26.5"D x 34.8"H

Heater Depth

9.8 kW: 23.07 in; 9.8 kW: 27.8 in; 8.5 kW: 19.41 in; 8.5 kW: 24.13 in

Heater Height

34.8 in

Heater Weight

119 lb

Heater Width

9.8 kW: 20.71 in; 8.5 kW: 17.72 in

Minimum Host-Room Height

74.17 in

Product Weight

9.8 kW: 148 lbs; 9.8 kW: 161 lbs; 8.5 kW: 119 lbs; 8.5 kW: 130 lbs

Installation Clearances

Installation Clearances
Ceiling-Clearance Reference Height Above Finished Floor

34.8 in

Ceiling-Clearance Reference Plane

Stove Top

Front Clearance

19.68 in

Rear Clearance

5.91 in

Left-Side Clearance

5.91 in

Right-Side Clearance

5.91 in

Combustible-Floor Base Ventilation Gap

1.18 in

Combustible-Floor Protection Front Depth

15.75 in

Combustible-Floor Protection Minimum Width

9.8 kW: 16.54 in; 8.5 kW: 14.96 in

Combustible-Floor Protection Side Extension

3.94 in

Combustible Side Clearance

5.91 in

Minimum Installation Envelope Width

9.8 kW: 32.52 in; 8.5 kW: 29.53 in

Noncombustible Wall Clearance

1.97 in

Top of Rocks Above Finished Floor

34.8 in

Through-Wall Installation (LS models)

Through-Wall Installation (LS models)
Wall Opening, Minimum

HIVE Flow LS: 19 in wide x 22 in tall from the floor. HIVE Flow Mini LS: 17 in wide x 22 in tall. With the Protective Bedding the height becomes 24.2 in.

Non-Combustible Wall Section, Minimum

25.6 in wide x 41.3 in tall from the floor; 43.3 in tall with the Protective Bedding.

Mounting Collar

HUUM Mounting Collar for HIVE Flow LS (large) or HIVE Flow Mini LS (small), designed for installation through a non-combustible wall; sold separately.

Installation

Installation
Flue Outlet Diameter

4.49 in

Included & Required

Included & Required
Included Components

Sauna Stove Metal Grate Heat Resistant Glove Splints Metal Fixing Plates (2) Ash Grate Cleaning Hatches (2) Ash Drawer Installation and Operational Manual

Required, Not Included

9.8 kW: 330 lbs stones (Qty 10 x 33 lbs 2 to 4 in stones boxes); 8.5 kW: 231 lbs stones (Qty 7 x 33 lbs 2 to 4 in stones boxes)

Certifications

Certifications
Certifications & Listings

Bimschv 2, CE

Warranty

Warranty
Residential Warranty

3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

Use the attached current manual and a qualified installer for final sizing, wiring, clearances, venting, and local-code compliance.

How It Fits

How This Product Fits the System

What it is used for

A wood-burning sauna heater that heats the room and stone mass for traditional löyly. Treat the stove, chimney, floor protection, clearances, combustion air, ventilation, and stones as one installation system.

What to plan

  • LS through-wall: the firebox extension passes through a non-combustible wall section at least 25.6 in wide x 41.3 in tall with an opening at least 19 in wide (Flow LS) or 17 in wide (Flow Mini LS) x 22 in tall from the floor; the Protective Bedding raises the opening height to 24.2 in. Use the matching HUUM Mounting Collar.
  • Size from adjusted sauna volume, including the effect of glass, masonry, and other uninsulated surfaces; do not size from floor area alone.
  • Match the selected model's power or fuel, voltage, phase, circuit, wire, control, stone, and venting requirements before ordering.
  • Treat clearances, ceiling reference planes, ventilation, guarding, floor protection, and service access as one room-layout decision.
  • Follow the current installation manual and use a qualified installer.

Required separately

Complete the system with these items.

Designed to work with

Model-specific replacements and compatible system components.

Optional accessories

Optional upgrades and accessories.

Attachments
Legacy manuals for older installations

Use these only when the document revision matches the installed product.

Gallery
Fast and Free Shipping!

Delivered thoughtfully from Illinois through our freight partners.  Deliveries typically take 12-16 days within the continental US.