Expert help that stays with you

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Sauna and heater customers also receive free shipping on sauna accessories for life.

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Includes

What Is Included

10.5 KW

Included with purchase

10.5 kW sauna heater installation and operation manual.

Required separately

UKU control, 331 lb stones (quantity 10 × 33 lb of 1" - 2" stones boxes).

6 KW

Included with purchase

6.0 kW sauna heater installation and operation manual.

Required separately

UKU control, 331 lb stones (quantity 10 × 33 lb of 1" - 2" stones boxes).

9 KW

Included with purchase

9.0 kW sauna heater installation and operation manual.

Required separately

UKU control, 331 lb stones (quantity 10 × 33 lb of 1" - 2" stones boxes).

Contents vary by configuration. Check the row for the option selected above.

Technical Specifications

Model & Application

Model & Application
Brand	HUUM
Catalog Product	HUUM STEEL Electric Sauna Heater \| 6, 9 & 10.5 kW
Heater Type	Electric sauna heater
Model Number	240 V / 1 phase: STEEL 11; 6 kW / 240 V / 1 phase: STEEL 6; 9 kW / 240 V / 1 phase: STEEL 9
SKU / Part Number	240 V / 1 phase: H1006032; 6 kW / 240 V / 1 phase: H1006012; 9 kW / 240 V / 1 phase: H1006022

Sauna Sizing

Sauna Sizing
Maximum Room Volume	240 V / 1 phase: 566 ft³; 6 kW / 240 V / 1 phase: 318 ft³; 9 kW / 240 V / 1 phase: 460 ft³
Minimum Room Volume	240 V / 1 phase: 354 ft³; 6 kW / 240 V / 1 phase: 177 ft³; 9 kW / 240 V / 1 phase: 283 ft³

Electrical

Electrical
Minimum Circuit	240 V / 1 phase, 9 kW / 240 V / 1 phase: 50 A; 6 kW / 240 V / 1 phase: 30 A
Phase	1 phase
Rated Current	240 V / 1 phase: 43.75 A; 6 kW / 240 V / 1 phase: 25 A; 9 kW / 240 V / 1 phase: 37.5 A
Rated Power	6 kW / 240 V / 1 phase: 6 kW; 9 kW / 240 V / 1 phase: 9 kW
Supply Voltage	240 V
Wire Size	240 V / 1 phase, 9 kW / 240 V / 1 phase: 8 AWG; 6 kW / 240 V / 1 phase: 10 AWG

Dimensions & Weight

Dimensions & Weight
Assembled Dimensions	13.25" W x 13.25" W x 38.25" H
Heater Depth	12.6 in
Heater Height	38.39 in
Heater Width	12.6 in
Minimum Host-Room Height	85.63 in
Product Weight	33 lbs

Installation Clearances

Installation Clearances
Ceiling-Clearance Reference Height Above Finished Floor	38.39 in
Ceiling-Clearance Reference Plane	Top Of Rocks
Left-Side Clearance	240 V / 1 phase, 9 kW / 240 V / 1 phase: 3.94 in; 6 kW / 240 V / 1 phase: 1.97 in
Right-Side Clearance	240 V / 1 phase, 9 kW / 240 V / 1 phase: 3.94 in; 6 kW / 240 V / 1 phase: 1.97 in
Combustible Side Clearance	240 V / 1 phase, 9 kW / 240 V / 1 phase: 3.94 in; 6 kW / 240 V / 1 phase: 1.97 in
Minimum Installation Envelope Width	240 V / 1 phase, 9 kW / 240 V / 1 phase: 20.47 in; 6 kW / 240 V / 1 phase: 16.54 in
Top of Rocks Above Finished Floor	38.39 in

Included & Required

Included & Required
Included Components	240 V / 1 phase: 10.5kW sauna heater Installation and operation manual 5-Year limited warranty (excluding elements); 6 kW / 240 V / 1 phase: 6.0kW sauna heater Installation and operation manual 5-Year limited warranty (excluding elements); 9 kW / 240 V / 1 phase: 9.0kW sauna heater Installation and operation manual 5-Year limited warranty (excluding elements)
Required, Not Included	UKU Control, 331 lbs stones (Qty 10 x 33 lbs of 1" - 2" stones boxes)

Certifications

Certifications
Certifications & Listings	CE, IPX4, SGS

Warranty

Warranty
Residential Warranty	3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

Use the attached current manual and a qualified installer for final sizing, wiring, clearances, venting, and local-code compliance.

How It Fits

How This Product Fits the System

What it is used for

An electric sauna heater that heats the sauna room and stone mass for traditional löyly. Choose the output from adjusted room volume, then match the exact voltage, phase, circuit, controls, stones, clearances, and ventilation.

What to plan

Size from adjusted sauna volume, including the effect of glass, masonry, and other uninsulated surfaces; do not size from floor area alone.
Match the selected model's power or fuel, voltage, phase, circuit, wire, control, stone, and venting requirements before ordering.
Treat clearances, ceiling reference planes, ventilation, guarding, floor protection, and service access as one room-layout decision.
Follow the current installation manual and use a qualified installer.

Required separately

Complete the system with these items.

HUUM UKU Sauna Control | Local & Wi-Fi Packages Required for operation; match the version and quantity to this selection.
HUUM Sauna Stones 1-2 in | 33 lb Box for CLIFF & STEEL Required for operation; match the version and quantity to this selection.

Designed to work with

Model-specific replacements and compatible system components.

HUUM 75-Foot UKU Extension Cables | Control & Sensor Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Extension Box Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Panel Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU-TEMP-SNSR Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Wi-Fi Main Module | SP0030 Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Door Sensor | SP0032 Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Control Panel Cable | 33 ft, SP0035 Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Surface Mounting Frame | UKU Glass, Mirror and Gold Designed for the same heater or control system; confirm compatibility with the selected model.

Optional accessories

Optional upgrades and accessories.

HUUM Flange CS | CLIFF & STEEL Embedding Flange Optional accessory; confirm model compatibility and room layout before adding it.
HUUM Reflect S | STEEL Heater Reflector Panel Optional accessory; confirm model compatibility and room layout before adding it.
HUUM Rail S | STEEL Heater Safety Railing Optional accessory; confirm model compatibility and room layout before adding it.

Products that use this item

This item is used by the following products.

SaunaLife Model G11 Outdoor "HOBBIT" Pod Sauna with Changing Room Optional accessory for the linked product.
SaunaLife EE8G Upper Bench Barrel Sauna Optional accessory for the linked product.

Sauna packages that offer this heater

Available heater options for these sauna packages.

Auroom Garda Prebuilt Sauna Available with this sauna package; confirm the current selection and installation requirements.

Other heater options

Compare these options; sizing, power, controls, clearances, and stones may differ.

HUUM CLIFF & CLIFF Mini Electric Sauna Heater | 3.5 to 10.5 kW A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Saunum AIR Closed Basket Climate Equalizing Sauna Heaters, Black | 5KW 7KW 10KW A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Cilindro Electric Sauna Heater A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Virta 10.5KW Electric Sauna Heater | HL110E A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Virta Combi 10.5KW HL110SA A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Saunum AIR Stainless Open Basket Climate Equalizing Sauna Heater A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
HUUM HIVE Mini Electric Sauna Heater | 6, 9 & 10.6 kW A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
2026 Saunum Air Perfect Air Blending Sauna Heater Package A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
HUUM CORE Electric Sauna Heater with Wooden Exterior | Black or Stainless Inlay, 6.5-10.5 kW A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Saunum Air Perfect 10 kW Heater Body A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.

Attachments

Hardware-Specific US/CA Manual - HUUM UKU 4.2 - v1

Official HUUM US/Canada UKU 4.2 installation and operation manual. Use only after the supplied or installed hardware is verified as UKU 4.2; a controller package name or commerce SKU does not establish its hardware generation.

View PDF Download

Hardware-Specific US/CA Manual - HUUM UKU 4.1 - H200402L03 v9 / content v4

Official HUUM US/Canada UKU 4.1 installation and operation manual. Use only after the supplied or installed hardware is verified as UKU 4.1; a controller package name or commerce SKU does not establish its hardware generation.

View PDF Download

Current US Manual - HUUM STEEL / STEEL Mini - H1006L03 v9 / content v4

Current official HUUM US installation and operation manual, verified by Sauna Marketplace on 2026-08-08. Applies to STEEL Mini 4 and STEEL 6, 9, and 11.

View PDF Download

Current HUUM Limited Warranty Terms - v4

Current official HUUM limited warranty terms linked from HUUM's U.S. warranty page and verified by Sauna Marketplace on 2026-08-08.

View PDF Download

HUUM Heating Element Requirements - distributor guide, 2025-12

Current Bathing Brands HUUM replacement-element matrix. HIVE Mini 6 uses three SP0008 2.0 kW elements; HIVE Mini 9 uses three SP0009 3.0 kW elements; HIVE Mini 11 uses three SP0010 3.5 kW elements.

View PDF Download

HUUM Heater and Stone Requirements - distributor guide, 2025-12

Current Bathing Brands HUUM stone matrix. HIVE Mini requires 330 to 331 lb of 2 to 4-inch Stones 24, supplied as ten 33-lb boxes.

View PDF Download

Gallery

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Free Shipping

Free LTL Shipping with Lift Gate Service

HUUM STEEL Electric Sauna Heater | 6, 9 & 10.5 kW

HUUM STEEL is a slim floor-standing stainless-steel heater with 330 lb of stones for gentle, long-lasting steam. Choose 6, 9, or 10.5 kW for current U.S. room ranges from 177 to 566 cubic feet. UKU control and 1 to 2-inch sauna stones are required and sold separately.

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Model	CLIFF Core DROP HIVE HIVE Mini STEEL

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Fulfillment Partner:

Bathing Distribution Center - Chicago

Zero Interest Payments:

Pay with HSA/FSA:

HUUM STEEL brings a large, stone-heavy heater into a clean architectural shell. Its 12.6-inch square footprint works especially well beside benches and glass while the stainless enclosure contains the stone mass.

Choose the right size

STEEL 6 covers 177–318 ft³, STEEL 9 covers 283–460 ft³, and STEEL 11 (sold here as 10.5 kW) covers 354–566 ft³. Use the current U.S. manual for model-specific clearances, wiring, and installation.

HUUM UKU control and ten 33-lb boxes of 1–2-inch sauna stones are required and sold separately.

Expert help that stays with you

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Includes