• Description
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Huum STEEL Mini Series 3.5kW Sauna Heater 

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) sold separately.

  • 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
  • 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 5-year warranty (excluding elements)

Product Specifications

Huum STEEL Mini Series 3.5kW Sauna Heater Product Specifications

PACKAGE CONTENTS 3.5kW sauna heater
Wall fastening bracket
Installation and operation manual
5-Year limited warranty (excluding elements)

OPTIONAL ACCESSORIES N/A
COMPATIBLE SAUNA CONTROL UKU
WEIGHT 32 lbs (14.5kg)
LENGTH / WIDTH 12.6" (320mm)
WIDTH / DEPTH 6" (150mm)
HEIGHT 38.4" (975mm)
DIAMETER N/A

DIMENSIONS

12.6" W (320mm) x 6" D (150mm) x 38.4" H (975mm)
KW 3.5
WATTS 3500
VOLTS 240
AMPS 14.58
PHASE 1PH
ROOM VOLUME (CU. FT.) 123 - 212 CU. FT.
ROCK CAPACITY 133 lbs


Product Manual

STEEL Installation Manual

Product Warranty

HUUM Heater Warranty

Limited 5-Year Warranty (excludes heating elements)

Product FAQs

N/A

Why Choose Green Vista Living


At Green Vista Living, we’re passionate about providing top-quality renewable energy and eco-friendly products that not only enhance your life but also help protect the planet. We’ve built our business with one mission in mind: to be the go-to destination for renewable energy solutions, outdoor gear, and off-grid supplies. When you shop with us, you’re not just getting innovative products—you’re joining a community that’s committed to sustainability.

We Put Our Customers First


As a small, dedicated team, we care deeply about your experience. Unlike large, faceless online companies, Green Vista Living offers a personal touch in everything we do. We're here for you from start to finish—whether you need product advice, support after a purchase, or just have questions. Our knowledgeable customer service team is always just a phone call or email away, ready to assist you in any way possible.

We Share Your Passion for the Planet


Our love for the outdoors and sustainable living runs deep. Most of our team hails from the mountains of Colorado, where renewable energy and the environment are part of daily life. So when you call Green Vista Living, you’ll speak directly with an expert who understands both the technical side of renewable products and the lifestyle they support. Whether you’re looking for solar generators, EV chargers, or any of our eco-friendly offerings, you can trust us to guide you with expertise and passion.

Trusted Industry Experts


Our close partnerships with the best brands in renewable energy and outdoor gear give us insider knowledge that you won’t find anywhere else. We’ve taken the time to carefully select products that stand out for their quality and reliability. At Green Vista Living, we believe in understanding our products inside and out so that we can help you make the right choice with confidence.

More Reasons to Love Green Vista Living


Price Match Guarantee: Thanks to our partnerships, we offer the best prices around. If you find a better deal, we’ll refund the difference.


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Volume Discounts: For large orders, we’re happy to provide special pricing—just reach out for a custom quote.


Authorized Dealer: As an authorized dealer for all our brands, you’ll receive full manufacturer warranties with every order.


At Green Vista Living, we aim to make your renewable energy and outdoor experience as seamless and enjoyable as possible. With our unmatched customer service, expertise, and dedication to quality, you can shop with confidence, knowing you’re supporting a company that’s as committed to the planet as you are.

Frequently Asked Questions

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote
Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
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Absolutely! Our in-house product experts are here to help. Live chat or call us 513-743-829 for personalized advice before or after your purchase.
Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
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