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HUUM HUUM STEEL Mini Series 3.5kW Sauna Heater STEELMIN35-240/1 Electric Sauna Heater Topture

HUUM STEEL Mini Series 3.5kW Sauna Heater

A 3.5kW HUUM STEEL Mini electric heater — slender wall-mount design with exceptionally short safety clearances, built for tight small-sauna spaces.

$1,576
$1,576 - $1,576
$1,576
$1,899
Save $323
$1,899 - $1,899
$1,899
+ Free Shipping Free Delivery within the Continental US
  • 133 lbs of stone capacity: longer, milder heat from more exposed stones.
  • Stainless steel construction with industrial-grade heating elements.
  • Pairs with HUUM's UKU controls (sold separately) for full sauna scheduling.
Includes $348 in free bonuses
The Sauna Mastery Protocol Digital Guide
The Sauna Mastery Protocol Digital Guide
$49 FREE
Full-Value Freight Insurance
Full-Value Freight Insurance
$299 FREE

Perfect for sauna rooms from 123 - 212 ft3

Select Stones

Required for Operation

Select Sauna Control

Required for Operation

HUUM STEEL Mini Series 3.5kW Sauna Heater $1,576
Free shipping (contiguous US) FREE
Free bonuses included $348 FREE
Total $1,576
  • Secure checkout
  • 30-day guarantee
  • 3 Year warranty
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In stock — estimated delivery:
Excellent Trustpilot

See What People Are Saying…

“This has completely transformed my workspace. The natural light is a game changer!”

Lisa R.
Verified owner

“Built it in a weekend with my brother. Glass front is the move — feels like a real room, not a closet.”

Mark T.
Verified owner

“I love the design and how easy it was to set up. Highly recommend for any home owner.”

James K.
Verified owner
Description

The compact STEEL Mini 3.5 kW sauna heater, with exceptionally short safety distances, is a wall-mounted model that is especially suited for modest sauna rooms. The STEEL Mini 3.5kW sauna heater is designed for sauna spaces up to 212 cubic feet (CF).

Required Control and sauna stones (4 boxes x 33 lbs of 1-2" stones) sold separately

    Specifications
    Heater Size 3.5 kW
    Sauna Room 123 - 212 CU. FT.
    Stone Capacity 133 lbs
    Height 38.4" (975mm)
    Width 12.6" (320mm)
    Depth 6" (150mm)
    Weight 32 lbs
    Dimensions HUUM Steel Mini

    Safety Distance

    Heater Size 3.5 kW
    A 1.97 in (50 mm)
    B 16.54" (420 mm)

    Power

    Documents

    User Manual

    HUUM Stone Requirements

    Warranty

    Features
    Heat Source Traditional Steam
    Heater Type Electric Heater
    Other Features
    • Slender design
    • Suitable for use in small saunas with limited space
    • Small safety distances
    • Heats up to 25% faster due to internal air duct
    • For sauna rooms from 123 to 212 cu. ft.
    • Works with UKU controls (sold separately)
    • 133 pound stone capacity (required 4 boxes sold separately)
    • Direct contact between stones and heating elements
    • More exposed stones creates a longer and milder heat
    • Stainless steel construction
    • Stainless steel, industrial quality heating elements​
    • Wall-mount model
    • Designed, engineered, and made in Estonia
    • Dimensions: 12.6" W (320mm) x 6" D (150mm) x 38.4" H (975mm)
    • Limited 3-year warranty (excluding elements)
    What's included?
    • 3.5kW sauna heater
    • Wall fastening bracket
    • Installation and operation manual
    Number of Units Included 1

    Warranty

    Warranty Limited 3-year warranty (except for heating elements)

    WARNING California's Proposition 65

    Warranty

    Products and Warranty Period

    Huum Product Warranty Period

    Read the full LIMITED WARRANTY TERMS AND CONDITIONS

    Your Own Sauna Ritual, in 3 Simple Steps

    You don't need a sales pitch, a spec sheet to decode, or six months of forum research.

    Size it right
    Step 1

    Size it right

    Every heater page lists the exact room size it's rated for, so you can match it to your sauna before you order.

    Get it installed
    Step 2

    Get it installed

    We provide the install spec sheet your electrician needs and our team is available if questions come up.

    Real löyly
    Step 3

    Real löyly

    With the heater, stones, and room properly matched, water on the rocks delivers the steam wave and rolling heat of a true Finnish session.

    WHAT COMES WITH EVERY TOPTURE ORDER

    Claim $348 in Free Bonuses Today

    The Sauna Mastery Protocol
    BONUS 1

    The Sauna Mastery Protocol

    The session times, temperatures, and weekly rhythm that turn a sauna into a habit you keep. Covers heat-up protocols, deep sleep, recovery stacking, and what to expect across the first 30 sessions. Sent to your inbox after purchase.

    $49

    INCLUDED

    Full-Value Freight Insurance + Priority Processing
    BONUS 2

    Full-Value Freight Insurance + Priority Processing

    Every CL4G ships fully insured from our US warehouse to your driveway. If anything arrives damaged, we handle the entire claim — no paperwork, no chasing the carrier. Orders dispatch in 2–6 business days if in stock, not 3–4 weeks.

    $299

    INCLUDED

    Retail Price: $1,899

    Today's price: $1,576

    Choose your options now
    Excellent Trustpilot rating 4.4 out of 5 stars Trustpilot
    ⚠ California Proposition 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

    REAL HOMES. REAL REVIEWS.

    See What Sauna Owners Are Saying…

    Rated 5/5 based on 122 happy owners

    We thought about buying a sauna for years and finally did. We absolutely love it, especially in the winter. It’s incredibly easy to assemble with two people the whole family uses it.

    Verified owner

    Ordered this sauna fall 2024 and we love it. No better feeling during a Minnesota winter. Lastly, I have to mention the customer service for this purchase has been like no other. Any questions or requests I had were addressed immediately by Topture. I got more than I expected from them and have already recommended them to several people looking for saunas. SO if you're thinking about it, JUST DO IT already..

    Verified owner

    Thanks for the great service - greatly appreciated.

    Verified owner

    TOPTURE vs. OTHER DEALERS

    Same look. Very different ownership experience.

    Other dealers

    Customer support
    Direct line to sauna experts, before and after the sale
    Generic chat, slow email
    Freight & handling
    Full-value insurance included, specialized heavy-freight carriers
    Cheap delivery, damage risk on you
    Dispatch speed
    Priority processing — ships in 2–6 business days from US warehouses
    Non-priority lead times, weeks of "processing"
    Brand authorization
    Authorized SaunaLife dealer — warranty honored, claims processed by us
    Often gray market or limited brand access
    Payment options
    Shop Pay 0% APR — from $241.95/mo
    Full payment upfront only
    Post-sale
    Heater sizing, install support, warranty handling, troubleshooting
    Order confirmation and silence

    Authorized SaunaLife retailer · warranty honored · US-based support.

    Choose your options now
    Excellent Trustpilot rating Trustpilot
    457+ Verified Reviews

    Real homeowners, rated 4.9/5 on Trustpilot.

    Lifetime Expert Support

    Same team before and after the sale, heater sizing, install help, warranty handling.

    Authorized HUUM Sauna Heater Dealer

    Factory-direct inventory, full lifetime warranty honored.

    Full Freight Insurance Included

    $0 risk if anything arrives damaged. We handle the claim.

    Real customer reviews

    What sauna owners are saying

    STILL UNSURE?

    Frequently Asked Questions

    General

    Where are you located, and where do you ship from?

    We are a U.S.-operated company with our main headquarters in Sheridan, Wyoming.

    Orders are shipped across the continental U.S. from our network of warehouses, managed by our logistics partners in California, Illinois, Texas, New York, Florida, and Toronto.

    How much is shipping?

    We’re proud to offer FREE SHIPPING on all orders over $200 within the Continental United States.

    The only exception is sauna stones—due to their weight and high shipping costs, we apply a shipping charge when they are purchased without a heater.

    Do you provide financing?

    Absolutely! To view your financing offer, simply select Shop Pay Installments as your payment method at Step 3 of checkout.

    You'll need to enter a debit card to receive your offer, but don’t worry—you can still back out before completing the purchase.

    How long will it take for my items to arrive?

    If you order today, you can expect delivery within 5-13 business days. In-stock products typically ship within 2-6 business days, and once they leave the warehouse, transit time is usually 3-7 business days, depending on your location. Let us know if you need more details!

    For pre-order or made-to-order items, the estimated delivery time frame is listed on the product page.

    What happens after I place my order?

    As soon as you place your order, you'll receive a confirmation email with your order details—be sure to keep it for your records. Once we process your order, we'll begin preparing it for shipment. As soon as it ships, you'll receive another email with tracking information.

    1-2 days before delivery, the delivery team will call you to schedule an appointment. You’ll need to be home to accept and sign for the delivery at the scheduled time.

    Is there a warranty?

    Yes, all products come with a manufacturer warranty. You can find the specific warranty details for each product under the "Warranty" tab on its product page.

    Do you have a showroom?

    We don’t have a showroom, which means we can bring you the lowest prices as we don’t need to worry about any extra costs!

    Where do you deliver to?

    We offer free Curbside Delivery to all 48 lower states and for some products even Canada.

    Do you ship internationally?

    International Shipping

    Yes, we offer international shipping for many of our products. Customers outside the US can request a personalized shipping quote by contacting us. Please be aware that any applicable taxes or customs fees will be the responsibility of the customer. Note that some items may be subject to shipping restrictions.

    Shipping to Hawaii, Alaska, and Puerto Rico

    We ship to Hawaii, Alaska, and Puerto Rico, although most items are subject to additional shipping fees. To obtain specific rates and prevent any restocking fees, please email us at contact@topture.com.

    HUUM HUUM STEEL Mini Series 3.5kW Sauna Heater STEELMIN35-240/1 Electric Sauna Heater Topture
    Excellent on Trustpilot

    Your electric sauna heater, done the right way.

    • 133 lbs of stone capacity: longer, milder heat from more exposed stones.
    • Stainless steel construction with industrial-grade heating elements.
    • Pairs with HUUM's UKU controls (sold separately) for full sauna scheduling.
    Includes $348 in free bonuses
    The Sauna Mastery Protocol Digital Guide
    The Sauna Mastery Protocol Digital Guide
    $49 FREE
    Full-Value Freight Insurance
    Full-Value Freight Insurance
    $299 FREE
    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • Shop Pay
    • Visa
    • Secure checkout
    • 30-day guarantee
    • 3 Year warranty
    Description

    The compact STEEL Mini 3.5 kW sauna heater, with exceptionally short safety distances, is a wall-mounted model that is especially suited for modest sauna rooms. The STEEL Mini 3.5kW sauna heater is designed for sauna spaces up to 212 cubic feet (CF).

    Required Control and sauna stones (4 boxes x 33 lbs of 1-2" stones    ) sold separately

      Specifications
      Heater Size 3.5 kW
      Sauna Room 123 - 212 CU. FT.
      Stone Capacity 133 lbs
      Height 38.4" (975mm)
      Width 12.6" (320mm)
      Depth 6" (150mm)
      Weight 32 lbs
      Dimensions HUUM Steel Mini

      Safety Distance

      Heater Size 3.5 kW
      A 1.97 in (50 mm)
      B 16.54" (420 mm)

      Power

      Documents

      User Manual

      HUUM Stone Requirements

      Warranty

      Features
      Heat Source Traditional Steam
      Heater Type Electric Heater
      Other Features
      • Slender design
      • Suitable for use in small saunas with limited space
      • Small safety distances
      • Heats up to 25% faster due to internal air duct
      • For sauna rooms from 123 to 212 cu. ft.
      • Works with UKU controls (sold separately)
      • 133 pound stone capacity (required 4 boxes sold separately)
      • Direct contact between stones and heating elements
      • More exposed stones creates a longer and milder heat
      • Stainless steel construction
      • Stainless steel, industrial quality heating elements​
      • Wall-mount model
      • Designed, engineered, and made in Estonia
      • Dimensions: 12.6" W (320mm) x 6" D (150mm) x 38.4" H (975mm)
      • Limited 3-year warranty (excluding elements)
      What's included?
      • 3.5kW sauna heater
      • Wall fastening bracket
      • Installation and operation manual
      Number of Units Included 1

      Warranty

      Warranty Limited 3-year warranty (except for heating elements)

      WARNING California's Proposition 65

      Warranty

      Products and Warranty Period

      Huum Product Warranty Period

      Read the full LIMITED WARRANTY TERMS AND CONDITIONS