M
Excellent
LOVE this suana. Maya and Norse Steam Team were amazing to work with!
HUUM Steel Mini 3.5: a 6 inch deep wall heater for saunas from 123 to 212 cubic feet
The HUUM Steel Mini 3.5 is a wall mounted electric sauna heater made in Estonia for very small rooms, rated at 3.5 kW for saunas from 123 to 212 cubic feet. Its slim stainless steel column measures about 12.6 inches wide, only 6 inches deep, and 38 inches tall, and weighs 32 pounds. It needs very little clearance from the wall, making it a good fit for a closet sized sauna. An internal air duct helps it heat up to 25 percent faster. It still holds 133 pounds of stones, which sit directly on the heating elements for soft, lasting heat.
The box holds the heater, its wall bracket, and the manual. It needs a HUUM UKU control to run, and you add that on the page. Choose the Wi-Fi version and you can start the sauna from your phone. Sauna stones are sold separately, so add the 4 boxes it needs on the page. A bucket and ladle set is optional. Want the control and stones in the same order? See the HUUM Steel Mini 3.5 heater package. The HUUM Steel Mini 3.5 ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
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 5-year warranty (excluding elements)
Includes
- 3.5kW sauna heater
- Wall fastening bracket
- Installation and operation manual
- 5-Year limited warranty (excluding elements)
Specifications
| Model | STEEL Mini 3.5 |
|---|---|
| Kilowatt Rating | 3.5 KW |
| Minimum Cubic Feet | 123 CF |
| Maximum Cubic Feet | 212 CF |
| Heater Weight | 32 lbs |
| Shipping Weight with Sauna Stones | 165 lbs |
| 240V, Single Phase Amperage | — |
| Width | 12.6″ W (320mm) |
| Depth | 6″ D (150mm) |
| Height | 38.4″ H (975mm) |
Manual
FAQ
What size sauna suits this 3.5kW heater?
It is designed for small sauna rooms from 123 to 212 cubic feet – think compact one- or two-person home saunas. Anything larger should step up in power; you can compare volume ratings across every model in our sauna collection before choosing.
How much space does it take up?
Very little. It is wall-mounted with a slender profile of 12.6 inches wide, just 6 inches deep, and 38.4 inches tall, and the series is engineered for exceptionally short safety distances, which is what makes it workable in genuinely tight sauna rooms.
Are stones included?
No, stones ship separately, but the Required Stones add-on on this page lists the four boxes of HUUM Stones 12 extra small (3-5 cm) stones this heater takes. Its 133-pound capacity is exceptionally large for this power range, per the description, giving steadier heat and better steam.
How do I control it?
It works with UKU controls, offered in the Sauna Heater Controls options on this page – from the UKU Local digital control to Wi-Fi, Mirror, and Gold versions. The Wi-Fi models pair with the HUUM app so you can start the heater from your phone.
Does it heat up quickly?
The features tab notes heating up to 25 percent faster due to an internal air duct. In a small, well-insulated room within its 123 to 212 cubic foot rating, that translates to a short wait between switching on and stepping into a hot sauna.
What warranty and build quality does it have?
It carries a limited 5-year warranty excluding heating elements, with stainless steel construction and industrial-quality heating elements, designed, engineered, and made in Estonia. Note the amperage row in the spec table is blank, so confirm circuit sizing with your electrician and the installation manual.
Customer Reviews
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What Our Customers Say
D
A sauna turns your garden into a spa oasis. We debated it for a while, but after renovating our house, we pulled the trigger and bought a sauna from Norse Steam and Maya. She was always super responsive and helpful throughout the process. Don't kid yourself, getting a really nice sauna is not that easy. Sizing and heating need to be figured out, as does the building, but we have always had a helpful partner on our side. She never upsold us on anything we didn't need, and we got some nice freebies when the sauna was delivered. And now we can really enjoy every moment in our garden.
KF
I'm really happy with my sauna purchase. Maya gave above and beyond excellent customer service. She wasn't pushy and gave impressive followup after the delivery to make sure everything was just right.
DE
I enjoy my FD2 Sauna with Red Light, Infrared and radiant heat. Use it 5x a week and my post workout soreness is minimal and sleep great. Maya at Norse Steam was excellent to work with.
B
We purchased the 3-person sauna for our outdoor garden. We chose the cube sauna for the aesthetic and could not be happier.
I assembled by myself except for the 2 large panels (requires a few people). Instructions were good - took me two partial Saturdays to complete and a few hours to unpack and organize in advance of assembly. Had my elec. add a NEMA enclosure on the back for the controller and power for lights and a 2nd panel for the wireless control.
Customer service was excellent
MP
Awesome Sauna and Awesome Company and Experience purchasing it from Maya!
After much research I chose the Finnmark FD-2 and it has met and exceeded all my expectations! Easy to assemble and it functions great - just as advertised. I highly recommend it for home use!
EA
Recently purchased the Finnmark one person after much research. Extremely happy with it and the ordering process. Maya was very responsive and helpful during the process and keeping us updated while we waited for shipment. There were several places I could have ordered this, but i chose Norse Steam based on the communication and customer service which was fantastic. The shipment was also excellent. The setup was pretty seamless for two people - but the best part is the sauna experience 10/10
G
Maya is amazing - super helpful and responsive. Looked at many stores, these guys have the best prices and service. Highly recommend
GR
Norse Steam, and specifically Maya, were extremely helpful as I was making the decision for our Sauna. I was able to get all of the necessary details to make a decision as construction was happening in my backyard to make space for it.
We absolutely love the CL7G. It is extremely comfortable for 6 people (can fit more less comfortably). The Thermory Spruce and Aspen in the interior smells great. The lighting is lovely. We paired the CL7G with the Harvia Spirit 10.5kw.
RS
Had great experience shopping at Norse Steam for the new heater. They had very good deal, with rocks. Customer service was good, and responded very fast with my questions. Received the heater, and it looks good, and the quality seem to be great. Will install soon, and am very excited to start experiencing sauna the way it ment to be
O
positive purchase experience - Harvia Legend 150 SL woodstove
thanks Norse Steam for flawless transaction - I got instant replies on my questions, received competitive price on the wood stove and got it delivered within two weeks!
Can highly recommend Norse Steam for others.
JR
Smoking Hot Tub!
I got the Norse Steam SaunaLife wood-fired hot tub, the S4N model, and its been seriously great. It heats up quicker than I expected, usually around an hour and a half, and once its hot, it stays that way for a good long while. The wood-fired system is simple to use, and honestly kind of fun.
The tub itself feels solid and well put together. The thermo-spruce exterior looks beautiful in person, and the fiberglass interior is smooth, deep, and easy to clean. Its the kind of setup that just works without a bunch of fuss, which I really appreciate.
Also, the team at Norse Steam was genuinely great to work with. Super helpful, quick to respond, and made the process really easy from start to finish. It felt like they actually cared that I was happy with it. The tub has totally become a go-to way to unwind, and I wouldnt change a thing.
S
Maya was so knowledgeable and responsive
Maya was so knowledgeable and responsive. She helped me understand the product options and found a fantastic solution that fit our needs. Her follow through was very helpful and made us comfortable with our decision. We are extremely happy with the end result!
W
Great service
I recently purchased the Harvia Club sauna equipment, and I am thoroughly impressed with both the product and the customer service experience. The heaters robust performance and durable stainless steel construction make it ideal for larger sauna spaces, providing consistent heat and a relaxing environment. Its compatibility with advanced controls ensures a personalized sauna experience every time.
The customer service team was exceptional, prompt, knowledgeable, and helpful throughout the purchase process. They ensured smooth delivery and provided clear guidance on installation and operation. Overall, I highly recommend Harvia Club for anyone seeking premium-quality sauna equipment backed by excellent support!
BT
Great Sauna & Purchase Experience
Great experience purchasing Finnmark FD-2 from Norse Steam. Good communication and easy to assemble. Temperature increases quickly (30 minutes or less to 140) and maintains well. So far this has been a great purchase.
M
Great sauna and great customer service
We purchased the Finnmark SD-1 sauna. Maya was extremely helpful with the purchase. We had an issue with the sauna not reaching the maximum temperature, and Maya connected us with the appropriate technician that explained how to correct the issue. The sauna now heats to the maximum temperature (170 degrees) in less than an hour, and it is a great unit. We are very happy with it, and we would definitely purchase from NorseSteam if we needed any other items.
JK
Sauna Review
I recently purchased a sauna from Norse Steam, and I couldn't be more impressed with the entire experience. From start to finish, their customer service was exceptional, and Maya deserves special recognition for her outstanding support!
Maya was incredibly knowledgeable and patient, answering all my questions about the sauna features, installation process, and maintenance. She went above and beyond to ensure I selected the perfect model for my home. Even after the purchase, Maya followed up to make sure everything was running smoothly and that I was satisfied with my sauna.
The sauna itself is top-notch beautifully designed, durable, and easy to use. It's clear that Norse Steam takes pride in the quality of their products and their commitment to customer satisfaction.
If you're considering a sauna, I wholeheartedly recommend Norse Steam. With their excellent customer service and high-quality products, you're in great hands. Thank you, Maya, and the entire Norse Steam team for a fantastic experience!
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