HUUM CORE 6.5kW Electric Sauna Heater | Customizable Exterior

Customizable Exterior

Instead of working around a predetermined metal casing, finish the CORE with compatible materials that complement the rest of your sauna.

Compact 6.5kW Performance

Designed for sauna rooms approximately 177–318 adjusted cubic feet, making it an excellent fit for smaller and mid-size residential sauna spaces.

Generous 66 lb Stone Capacity

The substantial stone mass helps retain heat and produces the softer, more enveloping steam associated with a traditional sauna experience.

Minimal Safety Distances

A minimum side clearance of approximately 2" creates greater freedom when planning benches, walkways, and heater placement.

Authentic Löyly

Pour water over the heated stones to create the wave of heat, steam, and humidity that defines traditional Nordic sauna bathing.

UKU Control Compatibility

Pair the CORE with a required HUUM UKU control for precise temperature management and optional WiFi app control depending on the selected controller.

Designed and Crafted in Estonia

HUUM combines contemporary European design with generations of Nordic sauna culture and traditional bathing principles.

WHAT MAKES HUUM CORE DIFFERENT?

A Heater Designed to Become Part of the Room

Most electric sauna heaters arrive as finished appliances. The CORE was designed differently.

The customizable BK/ST exterior allows you to visually connect the heater to the rest of your sauna instead of designing the room around a fixed factory finish.

Its flexibility goes beyond appearance. The compact footprint, minimal safety distances, and ability to integrate the heater into a properly designed sauna bench create installation possibilities that are difficult to achieve with a conventional box-style heater.

For smaller custom saunas where every inch and every material matters, the CORE 6.5kW offers an unusually refined balance of design freedom and authentic sauna performance.

HUUM CORE 6.5kW BK/ST Sauna Heater

Premium floor-standing electric sauna heater with stainless steel construction and customizable exterior.

Adjustable Legs

Included adjustable legs support proper leveling and final heater positioning.

Customizable Exterior Structure

The BK/ST model is supplied ready for a compatible custom exterior treatment rather than a conventional finished casing.

Installation & Operation Manual

Manufacturer documentation for installation, safety distances, electrical requirements, operation, stone loading, and maintenance.

Required but Sold Separately

• HUUM UKU Control System
• Approx. 66 lbs of Sauna Stones
• Electrical Connection Materials
• Optional Compatible CORE Exterior Panels

The standalone heater does not include the controller or sauna stones. Both are required for operation.

General

• Brand: HUUM
  
• Series: CORE
  
• Model: CORE 6 / BK/ST
  
• Heater Type: Electric Sauna Heater
  
• Mounting Style: Floor-Standing
  
• Power Rating: 6.5kW
  
• Construction: Stainless Steel / Customizable Exterior
  
• Country of Origin: Estonia
  

Sauna Room Sizing

• Recommended Sauna Room Size: Approx. 177–318 adjusted cu. ft.
  
• Metric Range: Approx. 5–9 m³
  

Important Sizing Note: Glass, tile, stone, brick, concrete, log walls, and other cold or uninsulated surfaces increase the effective heating load of the sauna. Contact NW Immersion if you are unsure which heater size is appropriate.

Electrical

• Supply Voltage: 240V
  
• Power: 6.5kW
  
• Amperage: Approx. 25A
  
• Circuit Breaker: 30A
  
• Recommended Wire Size: 10 AWG
  
• Required Control: HUUM UKU Control System
  
• Professional Installation: Required by a licensed electrician
  

HUUM’s current U.S. CORE documentation lists these electrical requirements for the CORE 6.

Stone Capacity

• Stone Capacity: Approx. 66 lbs
  
• Stones Required: Yes
  
• Stones Included: No
  

Proper stone loading is essential for airflow, heater performance, heat retention, and löyly.

Dimensions

• Width: Approx. 15.2"
  
• Depth: Approx. 15.2"
  
• Height: Approx. 32.7"
  
• Heater Weight: Approx. 41.9 lbs
  
• Minimum Side Safety Distance: Approx. 2"
  
• Minimum Clearance Above Heater: Approx. 43.3"
  

Always verify final placement and clearances using the current HUUM installation manual.

Plan your HUUM CORE installation with manufacturer resources covering heater placement, electrical requirements, safety clearances, exterior customization, bench integration, stone loading, UKU controls, and operation.

Before installation, we recommend sharing all manufacturer documentation with your licensed electrician and sauna installer so each can review the requirements relevant to the project.

Click Here for the HUUM Core Installation & Owner's Manual

Click Here for the HUUM UKU Control Installation & Owner's Manual

Click Here for Video on Installing the UKU Main Module

Click Here for Video on the UKU Control Installation

Click Here for Video on how to connect the UKU Control to WiFi

Free Shipping: This order qualifies for free shipping within the contiguous United States.

Processing Time: In-stock items typically leave the warehouse within 1–3 business days. This is processing time before transit, not final delivery time.

Confirm Availability: Inventory can change quickly. Call, text, or email NW Immersion before ordering if you have a specific project deadline.

Multiple Packages: The heater, sauna stones, control, and accessories may ship separately and arrive on different days.

Tracking: Tracking information will be emailed as each shipment leaves the warehouse.

Inspect Upon Arrival: Check all packages for visible damage upon delivery. Photograph any damage and contact NW Immersion promptly so we can assist.

HUUM Manufacturer Warranty

The HUUM CORE is backed by HUUM’s manufacturer warranty when properly installed, operated, and maintained according to manufacturer requirements.

Residential / Private Use: 3-Year Manufacturer Warranty

Warranty coverage is subject to HUUM’s current terms and may depend on proper electrical installation, heater sizing, ventilation, stone loading, operation, and maintenance.

As an Authorized HUUM Dealer, NW Immersion can assist with troubleshooting, warranty guidance, and manufacturer communication.