HUUM STEEL 10.5kW 240V Electric Sauna Heater- Complete Package Options

Exceptional Steam Quality

The large stone capacity allows you to pour water over a larger heated surface area, creating softer, richer steam and a more traditional sauna experience.

Slim Space-Saving Design

One of the most compact premium sauna heaters available, making it ideal for installations where space is limited.

WiFi Control Compatibility

Pair with the optional UKU WiFi Controller and control your sauna from anywhere using your smartphone.

Modern Scandinavian Styling

Crafted from stainless steel with clean architectural lines that complement luxury sauna interiors.

Built for Daily Use

Designed and manufactured in Estonia using premium materials engineered for long-term reliability.

• HUUM Steel 10.5kW Electric Sauna Heater
• Adjustable floor mounting legs
• Installation and operation manual
• Manufacturer warranty documentation

Optional Accessories

• HUUM UKU WiFi Control System
• HUUM Sauna Stones (required)
• Extension box (if needed for installation)

• Model: STEEL 10.5
• Heater Model: STEEL 10.5

Heater Specifications:

• Kilowatt Rating: 10.5 kW
• Minimum Cubic Feet: 354
• Maximum Cubic Feet: 566
• Heater Weight: 35 lbs
• Shipping Weight (with Sauna Stones): 366 lbs
• Voltage / Phase: 240V, Single-Phase
• Amperage: 43.75 A
• Width: 12.6"W (320 mm)
• Depth: 12.6"D (320 mm)
• Height: 38.4"H (975 mm)

UKU Control Specifications:

• Minimum Temperature Setting: 104°F
• Maximum Temperature Setting: 230°F
• Shipping Weight: 20 lbs

Console Dimensions:

• Width: 2.2" (55 mm)
• Depth: 0.9" (22 mm)
• Height: 4.1" (105 mm)

Main Module Dimensions:

• Width: 3.5" (90 mm)
• Depth: 2.3" (58 mm)
• Height: 5.6" (142 mm)

Display Panel Cable:

• Length: 9.8 ft
• AWG: 22

Temperature Sensor Cable:

• Length: 16.4 ft
• AWG: 24

Door Sensor Cable:

• Length: 16.4 ft
• AWG: 24

Downloadable Resources

HUUM Steel Manual

HUUM Steel Spec Diagram

HUUM Stone Requirements

Elements Required

Huum warranty

Size Your Sauna

• 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 the processing period before transit, not the final delivery time.
• Confirm Availability: Inventory can change quickly. Please call, text, or email NW Immersion before ordering if you need confirmation of current stock or have a specific delivery deadline.
• Multiple Packages: The heater, sauna stones, controls, and accessories may ship in separate boxes or on separate pallets. Packages may arrive on different days.
• Tracking: Tracking information will be emailed for each shipment as soon as it leaves the warehouse.
• Inspect Upon Arrival: Check every package for visible damage before accepting delivery. Photograph any damage and contact NW Immersion promptly so we can assist.

Questions about availability, delivery, heater sizing, controls, or installation requirements? Our U.S.-based sauna specialists are available by phone, text, or email.

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.