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

HUUM STEEL 10.5kW 240V Electric Sauna Heater - Complete Package Options - NW Immersion
$2,391.00 $2,899.00 SAVE $508.00
By HUUM
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Authorized Dealer – Full Warranty Included

Premium Home Sauna Heater for Medium to Large Sauna Rooms

The HUUM Steel 10.5kW Electric Sauna Heater is a sleek, high-performance electric sauna heater engineered for sauna enthusiasts who want the perfect balance of modern design, powerful heating, and authentic steam. Its slim stainless steel body and remarkably small safety clearances make it ideal for maximizing usable space while delivering exceptional performance.

Designed for sauna rooms from 354 to 566 cubic feet, the HUUM Steel sauna heater holds up to 330 lbs of sauna stones, producing long-lasting, gentle heat and rich steam that rivals traditional wood-fired saunas. Pair it with an optional UKU WiFi Control System for convenient remote operation from your smartphone.

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HSA & FSA Eligible. learn more.

Components Required for Operation- Sauna Stones

This heater requires sauna stones to operate. If you already own these, you do not need to purchase them here.

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Components Required for Operation- HUUM Controls

This heater requires a compatible control unit to operate. If you already own a compatible control, you do not need to purchase them here.

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Not sure if this heater is the right size for your sauna? Use our Sauna Heater Calculator

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  • Premium Craftsmanship & Manufacturer Warranty
  • Expert Guidance Before, During & After Delivery
  • Personalized Delivery Planning & Coordination
  • Real Sauna Specialists Just a Call, Text or Chat Away
Eric from NW Immersion

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Our team helps customers nationwide with sauna selection, site preparation, delivery planning, and installation guidance.

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The HUUM Steel 10.5 electric sauna heater combines elegant Scandinavian design with exceptional sauna performance. Unlike many traditional electric sauna heaters, the Steel Series features an extremely narrow profile and large stone capacity, allowing users to enjoy more consistent temperatures and superior steam quality.

Its floor-standing design makes installation straightforward, while the open stone basket design maximizes heat retention and steam production. Whether you're building a luxury residential sauna or upgrading an existing space, the HUUM Steel delivers an elevated sauna experience.

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

Plan your HUUM STEEL installation with helpful manufacturer resources, including heater manuals, UKU control documentation, main module instructions, wiring diagrams, specification sheets, and installation videos.

Before installation, we recommend sharing these resources with your licensed electrician and sauna installer so they can review heater placement, electrical requirements, control setup, stone loading, safety clearances, and installation requirements in advance.

Always follow the official HUUM installation manuals, local electrical code, and guidance from your licensed electrician. NW Immersion is also here to help with heater sizing, package selection, and general installation planning before your order ships.

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

HUUM Steel Spec Diagram

HUUM Stone Requirements

Elements Required

Huum warranty

Size Your Sauna

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 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.

Click Here for the HUUM Manufacturer Warranty

HUUM Manufacturer Warranty

Backed by HUUM’s manufacturer warranty when installed and used according to HUUM’s official instructions.

Warranty coverage may vary by component, installation type, use environment, maintenance, chimney connection, and fuel use. Sauna stones, chimney components, and accessories may each carry their own warranty terms.

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

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

Frequently Asked Questions

The HUUM Steel 10.5kW is recommended for sauna rooms between 354 and 566 cubic feet.


No. Sauna stones are purchased separately and are required for operation. You may choose to add them onto your Heater purchase.

Yes. The heater is compatible with the HUUM UKU WiFi Controller, allowing remote operation from a smartphone app.

The HUUM Steel 10.5 can hold approximately 330 pounds of sauna stones, providing exceptional heat retention and steam production.

Absolutely. It is one of the most popular premium home sauna heaters available for residential installations.

The heater operates on 240V power and should be installed by a qualified electrician.


A larger stone capacity creates softer, longer-lasting steam and more stable temperatures throughout your sauna session.


Yes. The heater is specifically designed for water-on-stone sauna bathing and produces excellent steam.


No. The UKU control system is sold separately but you may choose to add it onto your purchase.


HUUM heaters combine modern Scandinavian design, large stone capacity, premium materials, and exceptional steam quality, creating a sauna experience that feels closer to a traditional wood-fired sauna than many conventional electric heaters.

  • 5 stars: 1 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
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  • 1 star: 0 (0%)
S
Samking

We chose the HUUM Steel for our outdoor sauna and love how clean and modern it looks. It heats the space extremely well and the large amount of stones provides the best sauna experience- very soft and consistent heat as well as substantial loyly! Feels amazing! The WiFi control has been one of our favorite features because we can start the sauna ahead of time and have it ready when we are. Our electrician handles the install and NW Immersion was helpful with sizing (their sauna heater size calculator was spot on) and making sure we had the right package. This heater is not the quickest to heat up due to the amount of rocks but well worth it for the best traditional sauna experience.

Samking review photo

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