Powerful 12kW Performance

The HIVE 12kW is designed for larger traditional sauna rooms where smaller heaters simply cannot provide enough heat performance.

Massive Stone Capacity

With up to approximately 551 lbs of sauna stone capacity, the HIVE 12 creates a deep, steady heat and soft steam experience that feels more natural and luxurious than heaters with smaller stone loads.

Authentic Löyly

Pour water over the heated stones to create the steam, humidity, and atmosphere that define a traditional Finnish-style sauna experience.

Sculptural Stainless Steel Design

The HIVE’s rounded stainless steel form gives the sauna interior a refined, architectural focal point that feels modern, minimal, and premium.

HUUM UKU Control Compatibility

Pair your HIVE 12 with a required HUUM UKU control system for precise temperature management and optional WiFi app control depending on the control model selected.

HIVE Air Tunnel Included

The included HIVE Air Tunnel helps improve airflow, supports faster heat-up, and can reduce the total stone volume needed in the center of the heater.

Designed and Crafted in Estonia

HUUM heaters are designed and engineered in Estonia, blending Nordic design with traditional sauna principles.

What Makes HUUM HIVE Different?

More Stones. Softer Heat. Better Steam.

The HIVE series is designed around one of the most important parts of traditional sauna bathing: the stones.

A larger stone mass helps store heat more evenly and creates a softer, longer-lasting steam when water is poured over the stones. The open circular design exposes more stone surface area, helping the heater create a beautiful löyly experience that feels gentler and more enveloping than sharp, dry heat alone.

For larger sauna rooms, this matters. The HIVE 12kW gives you the power needed for bigger spaces, while the generous stone capacity helps preserve the comfort, atmosphere, and ritual of authentic sauna bathing.

Is the HUUM HIVE 12kW Right for Your Sauna?

Best for Large Traditional Sauna Rooms

The HUUM HIVE 12kW is best suited for large traditional sauna rooms. Published specifications list the HIVE 12 for sauna rooms approximately 424–636 adjusted cubic feet.

To calculate your basic sauna room size:

Length × Width × Height = Cubic Feet

Then account for cold surfaces such as:

• Glass walls or large glass doors
  
• Tile
  
• Stone
  
• Brick
  
• Concrete
  
• Log walls
  
• Other uninsulated or heat-absorbing surfaces
  

These surfaces increase the effective heating demand of the sauna room. If your sauna includes significant glass, stone, tile, or other cold surfaces, the adjusted room volume may be larger than the basic cubic footage.

Not sure if the HIVE 12kW is the right size? Contact NW Immersion before ordering and we can help confirm heater sizing, UKU control requirements, stone package needs, electrical requirements, and installation considerations.

HUUM HIVE 12kW Sauna Heater

Premium floor-standing electric sauna heater designed for large traditional sauna rooms.

Pre-Installed HUUM HIVE Air Tunnel

Supports improved airflow, faster heat-up, and reduced stone volume in the center of the heater.

Adjustable Legs

Included adjustable legs help support proper heater placement and leveling during installation.

Installation & Operation Manual

Manufacturer documentation included for installation, safety clearances, operation, and maintenance.

Required but Sold Separately

• HUUM UKU Control System
  
• HUUM UKU Extension Box
  
• HUUM Sauna Stones
  

The standalone HIVE 12kW heater does not include the controller, extension box, or sauna stones. These items are required for operation and should be selected from the add-ons above when building your heater package.

General

Brand: HUUM

Model: HIVE 12

Heater Type: Electric Sauna Heater

Mounting Style: Floor-Standing

Power Rating: 12kW

Construction: Stainless Steel

Country of Origin: Estonia

Recommended Use: Large traditional sauna rooms, residential or commercial-style sauna spaces

Sauna Room Sizing

Recommended Sauna Room Size: Approx. 424–636 adjusted cu. ft.

Metric Range: Approx. 12–18 m³

Maximum Temperature: Up to 230°F

Important Sizing Note: Glass, tile, stone, brick, log walls, and other cold surfaces can increase the adjusted room volume. When in doubt, contact NW Immersion before purchase so we can help confirm proper sizing.

Published HUUM HIVE 12 specifications commonly list the heater for sauna rooms approximately 424–636 adjusted cubic feet. Always confirm final heater sizing using adjusted cubic footage and the official HUUM sizing guidance.

Electrical

Supply Voltage: 240V

Phase: Single Phase

Amperage: 50A

Required Circuit Breakers: 30A + 30A

Recommended Wire Size: 10 AWG + 10 AWG

Professional Installation: Required by a licensed electrician

Required Control: HUUM UKU Control System

Required Extension Box: HUUM UKU Extension Box

Published HIVE 12 specifications commonly list 240V single-phase operation, 50A amperage, 30A + 30A circuit breakers, and 10 AWG + 10 AWG wiring. Always confirm final wiring requirements with the official HUUM installation manual and a licensed electrician.

Stone Capacity

Stone Capacity: Approx. 551 lbs

Stone Size: 5–10 cm / approx. 2–4"

Stones Required: Yes

Stones Included with Base Heater: No

Required for Operation: HUUM sauna stones must be added separately

The HUUM HIVE 12 requires sauna stones for safe operation and authentic löyly. Published specifications list approximately 551 lbs of stone capacity. The included HIVE Air Tunnel may reduce total stone volume required in the center of the heater, so always follow current HUUM stone loading guidance for final installation.

Dimensions & Weight

Diameter: 22"

Height: 29.6"

Heater Weight: Approx. 44.1 lbs

Shipping Weight with Stones: Approx. 600 lbs

Heater Construction: Stainless steel

Controls & Required Components

Compatible Controls: HUUM UKU Local, HUUM UKU WiFi, or other compatible UKU control options

UKU Control Included with Base Heater: No

UKU Extension Box Required: Yes

Sauna Stones Included with Base Heater: No

HIVE Air Tunnel Included: Yes

Adjustable Legs Included: Yes

The HUUM HIVE 12kW must be paired with a compatible UKU control system, UKU extension box, and proper sauna stones before operation. The Sauna Heater notes that the HIVE 12 does not include a controller, extension box, or stones, and that these are required for operation.

Installation Notes

Professional Installation Required

The HUUM HIVE 12kW must be installed by a licensed electrician and in accordance with the official HUUM installation manual, local electrical code, and all required safety clearances.

Because the HIVE 12kW is a high-output electric sauna heater, it requires the correct wiring, breaker configuration, UKU control system, UKU extension box, ventilation, stone loading, and safety clearances.

Always refer to the official manufacturer documentation before installation.

Resources- Click Links Below

HUUM Hive Operational Manual

HUUM Hive Spec Diagram

HUUM Stone Requirements

Elements Required

Huum Warranty

Size Your Sauna

Free Shipping

The HUUM HIVE 12kW includes free shipping within the contiguous United States.

This heater may ship by parcel or freight depending on the selected package configuration and add-ons. Once your order ships, tracking information will be provided. If your order ships by palletized freight, the carrier will contact you directly to schedule delivery.

Shipping timelines may vary based on inventory, package configuration, sauna stones, accessories, and seasonal freight conditions. Contact NW Immersion before ordering for the most current lead time.

HUUM Manufacturer Warranty

Every HUUM electric sauna heater is designed to deliver years of exceptional sauna experiences and is supported by HUUM’s manufacturer warranty, including a 3-Year Limited Residential Warranty and a 1-Year Limited Commercial Warranty.

Built with meticulous attention to detail and premium European craftsmanship, HUUM heaters are trusted by homeowners, sauna builders, and wellness professionals worldwide. Warranty coverage may vary by use type and component, including the heater body, controls, and related electrical components. Heating elements are considered normal-wear items and are excluded from warranty coverage.

As an Authorized HUUM Dealer, NW Immersion is here to help with heater sizing, product selection, delivery coordination, troubleshooting, warranty guidance, and long-term support.

Always refer to the official HUUM warranty documentation included with your heater for complete terms and final coverage details.