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HUUM STEEL Mini 4

HUUM STEEL Mini 4

The HUUM STEEL Mini 4 is a 3.5 kW wall-mounted electric sauna heater designed for compact sauna rooms from 106 to 177 cubic feet. With a slim profile measuring just 6 in deep, the STEEL Mini is engineered for installations where available sauna space is limited. Despite its compact dimensions, the STEEL Mini accommodates up to 133 lb of sauna stones. Its open stainless-steel construction places the stones in direct contact with the industrial-quality heating elements while providing substantial thermal mass. HUUM also incorporates an internal air duct that the manufacturer states can provide up to 25% faster heat-up. Designed, engineered, and manufactured in Estonia, the STEEL Mini 4 operates on 240V single-phase power and requires a compatible HUUM UKU control for operation. A compatible HUUM UKU control and 133 lb of sauna stones (4 boxes) are required and sold separately.
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Key Features

3.5 kW Heating Capacity: Designed for compact sauna rooms from 106 to 177 cubic feet.

Ultra-Slim Design: Measures only 6 in deep, making it well suited for sauna installations with limited interior space.

Wall-Mounted Installation: Keeps the sauna floor clear while maximizing usable interior space.

133 lb Stone Capacity: Accommodates substantial stone volume compared with the heater's compact dimensions.

Reduced-Clearance Design: Engineered with short safety distances for space-conscious sauna installations.

Faster Heat-Up Design: HUUM states that the internal air duct allows the STEEL Mini to heat the sauna up to 25% faster.

External Control Required: Designed for operation with a compatible HUUM UKU sauna control, sold separately.

Wi-Fi Control Option: Remote functionality is available when paired with a compatible HUUM UKU Wi-Fi control.

Direct Stone-to-Element Contact: Open construction allows stones to surround and directly contact the heating elements.

Open Stone Design: Extensive exposed stone surfaces provide substantial thermal mass for a traditional sauna experience.

Stainless Steel Construction: Constructed from stainless steel with industrial-quality stainless-steel heating elements.

Made in Estonia: Designed, engineered, and manufactured in Estonia.

Product Details

Model: STEEL Mini 4

Product Type: Electric Sauna Heater

Series: STEEL Mini

Installation Type: Wall-Mounted

Heating Power: 3.5 kW

Sauna Room Size: 106–177 cu. ft.

Voltage: 240V

Phase: Single Phase

Amperage: 14.58A

Control Type: External HUUM UKU Control Required

Wi-Fi Capability: Available with Compatible UKU Wi-Fi Control

Stone Capacity: 133 lb

Required Stone Quantity: 4 Boxes, Sold Separately

Construction: Stainless Steel

Heating Elements: Stainless Steel, Industrial Quality

Heater Weight: 32 lb

Shipping Weight with Sauna Stones: 165 lb

Country of Manufacture: Estonia

Residential Warranty: 3-Year Limited Warranty

Commercial Warranty: 1-Year Limited Warranty

Included

  • HUUM STEEL Mini 4 3.5 kW Sauna Heater
  • Wall Fastening Bracket
  • Installation and Operation Manual
  • 3-Year Limited Residential Warranty
  • 1-Year Limited Commercial Warranty

A compatible HUUM UKU control and 133 lb of sauna stones (4 boxes) are required for operation and are sold separately. Additional electrical or installation components may be required according to the installation configuration.

Dimensions

Width: 12.6 in (320 mm)

Depth: 6 in (150 mm)

Height: 38.4 in (975 mm)

Overall Dimensions: 12.6 × 6 × 38.4 in (W × D × H)

Heater Weight: 32 lb

Stone Capacity: 133 lb

Shipping Weight with Sauna Stones: 165 lb

Shipping & Delivery

Shipping rates are calculated based on the delivery location. Final shipping costs will be confirmed based on the destination.

Installation and Operation

HUUM-STEEL-Sauna-Heater-IOM.pdf

View full details

HUUM STEEL Mini 4
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Required Components

Stones

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About Rodeo

At Rodeo we're on a mission to create the best saunas in the world. It all started with a simple realization - existing brands were either overpriced or cheap knock-offs.

So we built the brand we wished existed. A perfect balance of great materials, honest craftsmanship, and clean design at a fair price. We focus on what actually matters - crafting great products that hold up to real, everyday use.

We build with the belief that products should become part of your routine, not end up in a landfill. No trends. No gimmicks. Just great saunas, made the right way by people who care about their craft.

We make saunas for folks who deeply love the art of rest, recovery and relaxation after a hard days work.

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