Customizable Exterior

Finish the CORE with compatible materials that complement your sauna instead of working around a predetermined metal casing.

Powerful 9kW Performance

Designed for sauna rooms approximately 283–460 adjusted cubic feet, making it a versatile option for many residential traditional saunas.

66 lb Stone Capacity

The stone mass helps store heat and creates softer, more enveloping steam for a more authentic traditional sauna experience.

Compact Floor-Standing Design

Despite its heating capability, the CORE occupies only approximately 15.2" × 15.2" of floor space.

Minimal Safety Distances

Approximately 2" of required side clearance allows greater freedom when designing benches and interior circulation.

Bench Integration Capability

The CORE can be incorporated into a properly designed sauna bench when HUUM placement and airflow requirements are followed.

Smart Control Options

Pair the heater with a HUUM UKU WiFi control for precise temperature management and remote sauna operation.

What Makes the HUUM CORE Different?

Architectural Freedom Without Sacrificing Performance

The CORE challenges the idea that an electric sauna heater has to look like a separate appliance.

Its customizable exterior gives you the ability to coordinate the heater with the rest of the room, while the compact body and small safety distances create more flexibility in the overall layout.

The result is especially compelling in premium residential sauna projects where every material has been intentionally selected.

Combined with a 66 lb stone capacity and powerful 9kW output, the CORE is equally focused on how the sauna performs and how the finished space feels.

• HUUM CORE 9kW BK/ST Electric Sauna Heater
  
• 4 Adjustable Legs
  
• 4 Unfinished Metal Exterior Shields
  
• 4 Upper Cover Strips
  
• Cover Strip Fastening Hardware
  
• Installation & Operation Manual
  

Required but Sold Separately

• HUUM UKU Control System
  
• Approx. 66 lbs of Sauna Stones
  
• Heat-Resistant Electrical Connection Cable
  
• Optional HUUM CORE Wood Panels or Custom Exterior Finish

General

• Brand: HUUM
  
• Series: CORE
  
• Model: CORE 9 BK/ST
  
• Heater Type: Electric Sauna Heater
  
• Installation: Floor-Standing
  
• Power: 9kW at 240V
  
• Construction: Stainless Steel / Customizable Exterior
  
• Country of Origin: Estonia
  

Sauna Room Sizing

• Recommended Sauna Volume: Approx. 283–460 cu. ft.
  
• Metric Range: Approx. 8–13 m³
  

Important: Glass, tile, stone, brick, concrete, log walls, and other uninsulated surfaces increase the effective heating load of the sauna.

Electrical

• Voltage: 240V
  
• Power: 9kW
  
• Amperage: Approx. 37.5A
  
• Circuit Breaker: 50A
  
• Recommended Wire Size: 8 AWG
  
• Required Control: HUUM UKU
  
• Professional Installation: Required by a licensed electrician
  

Stones

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

Proper stone placement and airflow are essential for heater performance and longevity.

Dimensions

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

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 product qualifies for free shipping within the contiguous United States.

Processing Time: In-stock orders typically leave the warehouse within 1–3 business days.

Multiple Packages: Heater, control, stones, and accessories may ship separately.

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

Inventory: Contact NW Immersion if you have a firm installation or delivery deadline.

Inspect Upon Arrival: Check packages promptly for damage and photograph any visible damage before discarding packaging.

HUUM Manufacturer Warranty

The HUUM CORE includes a 3-year manufacturer warranty for private residential use when properly installed, operated, and maintained according to manufacturer requirements.

Warranty coverage is subject to HUUM’s current terms.

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