






HUUM STEEL Mini 4 | Electric Sauna Heater | UKU Controller | 106′ to 177′ Cu ft
$2,400.00 Original price was: $2,400.00.$1,976.00Current price is: $1,976.00.
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FREE SHIPPING
REQUIRED a Control Panel
STEEL Series Mini 4kW Sauna Heater
The compact HUUM STEEL Mini 3.5 kW sauna heater, with exceptionally short safety distances, is a wall-mounted model that is engineered for smaller sauna rooms.
The STEEL Mini sauna heater is designed for sauna spaces from 106 to 177 cubic feet (CF).
STEEL Mini 4 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
- 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 residential warranty and limited 1-year commercial warranty (excluding elements)
The STEEL Mini 4 Includes
- 3.5kW Sauna Heater
- Wall Fastening Bracket
- Installation and Operation Manual
- 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)
STEEL Mini 4 Specifications
Model | STEEL Mini 3.5 |
Kilowatt Rating | 3.5kW |
Minimum Cubic Feet | 106 |
Maximum Cubic Feet | 177 |
Heater Weight | 32 lbs |
Shipping Weight with Sauna Stones | 165 lbs |
240V, Single Phase Amperage | 14.58 Amps |
Width | 12.6″W (320mm) |
Depth | 6″D (150mm) |
Height | 38.4″H (975mm) |
STEEL Mini 4 Installation and Operational Manual
HUUM STEEL Sauna Heater Installation Guide – CLICK HERE
STEEL Mini 4 Certification
HUUM STEEL Cert of Compliance – CLICK HERE
Stone Requirements
HUUM STEEL Stone Requirements – CLICK HERE
HUUM Heater Elements
HUUM STEEL Element Requirements – CLICK HERE
Size Your Sauna
HUUM STEEL Size Your Sauna – CLICK HERE
HUMM Warranty
HUUM STEEL Warranty – CLICK HERE
SHIPPING
SHIPPING IS FREE!
The weight or packaging of this product requires delivery by special appointment, and on a wooden pallet. You will get a call days before delivery to set up ETA.
Usually within 1-2 weeks of purchase.
The driver is responsible for curbside delivery “only” and will lower the items to ground level.
Prior to shipping this product, we contact customers to share shipment details and discuss any extenuating delivery circumstances that may complicate or cause additional delivery expenses.
Our goal is to ensure your project’s success.
STEEL Control Panels
The UKU sauna control system is a great way to heat up your sauna with modern technology.
You can control it from the local sauna control panel or the HUUM mobile app.
UKU Classic – Local

Learn more about the UKU local by CLICKING HERE
UKU Classic – Wifi

Learn more about the UKU Wi-Fi by CLICKING HERE
UKU Glass

Learn more about the UKU glass by CLICKING HERE
UKU Glass Surface Mount

This surface mount will helps attach the UKU Glass to any surface.
CLICK HERE to learn more about it.
HUUM Sauna Rocks
HUUM Drop takes 132lbs of sauna rocks
Product range of HUUM includes round sauna stones with a diameter of 5–10 cm / 2-4 in.
Olivine diabase sauna stones are enduring and their thermal capacity is high.
It’s recommended to use round sauna stones in HUUM sauna heaters. Round stones complement the design of the heaters and provide milder steam.
Why Use Our Rocks?
You can find your own stones but make sure you’re using the correct ones.
This video can help explain.
HUUM app enables one to heat the sauna from a smartphone

HUUM mobile app allows you to heat the sauna from your phone, wherever you are.
It doesn’t matter whether you are heading home from the office, finishing your evening jog or simply wish to have an unplanned rewarding sauna evening with your friends – just a few clicks on the smartphone, and a hot sauna awaits you!
Soft steam that resembles the traditional sauna
The amount of metal used in HUUM sauna heaters is very small – this ensures that majority of the heat derives from the stones, and not from the metal.
This maximizes the proportion of beneficial negative ions in the air, which is also high in the traditional wood-heated sauna.
This and the exceptionally large quantity of sauna rocks are the secret ingredients of the curative, gentle and long-lasting steam of our sauna heaters.
Learn more:
What happens to our body in and after the sauna
Have a Question About Our Heater? Let us know.
| Weight | 40 lbs |
|---|---|
| Dimensions | 12 × 12 × 42 in |
| MODEL |
DROP 4.5 ,DROP 6 ,DROP 7.5 ,DROP 9 |
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Smooth Delivery, Every Time
At Cedar-Sense, we're committed to delivering more than just products – we're delivering a seamless experience. Our streamlined shipping process is geared towards making your journey from checkout to doorstep a breeze. Once you hit that 'Confirm Order' button, our team kicks into high gear, ensuring your package is swiftly on its way.
We've partnered with trusted carriers, because your trust matters. Expect reliable and timely deliveries, tracked in real-time with a user-friendly system. We know the anticipation is real, and we want you to be in the loop every step of the way.
Our commitment extends to secure packaging – because your items should arrive as beautifully as you imagined them. At Cedar-Sense, your satisfaction is not just a goal; it's our promise, delivered with care, precision, and a touch of excitement.
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