Add ease to your heater shopping journey with the HUUM STEEL Mini 3.5 kW Electric Sauna Heater Package. This all-in-one solution comes with everything you need to operate your heater, including: a HUUM STEEL Mini Heater, an UKU Controller in your choice of style, and the stones. These components are hand-picked by our sauna experts to ensure reliable sauna performance.
Bring powerful heat to compact saunas with the HUUM STEEL Mini 3.5 kW Electric Sauna Heater. This heater’s slim profile mounts directly to the sauna wall and has small safety distance requirements for a snug fit in custom layouts and tight spaces. It produces temperatures up to 230℉, creating remarkably hot sessions in saunas ranging from 106 - 177 ft3 (adj.).
An open-air design showcases all 132 lbs. of stone, bringing an ambience of natural charm while encouraging water-pouring for powerful, soft steam. The HUUM STEEL Mini is complete with an integrated air tunnel that optimizes airflow for perfect sauna sessions.
Dial in the perfect sauna experience with the included HUUM UKU Controller. This panel lets you adjust temperatures and schedule sessions in advance to ensure your sauna is ready when you are. It can also connect to sauna lighting and ventilation for convenient control over the mood of the session. Available in classic, wood, and glass models, this controller offers an effortless way to customize your sauna.
1x HUUM STEEL Mini 3.5 kW Sauna Heater
1x HUUM STEEL Mini Installation and Operation Manual
1x HUUM UKU External Controller
1x Main Control Module and Cable
1x Temperature Sensor and Cable
1x Door Sensor and Cable
1x Installation & Operation Manual
4x 33 lb. Boxes of HUUM Stones 12 (132 lbs. total)
| Model | STEEL Mini 4 |
| Heater Type | Electric |
| Sauna Size Range | 106 - 177 ft3 (adj.) |
| Stone Capacity | 132 lbs |
| Maximum Temperature | 230℉ |
| Kilowatt Rating | 3.5 KW |
| Heater Weight | 32 lbs |
| Shipping Weight w/ Stones | 166 lbs |
| 240V, 1 Ph Amperage | 14.58 Amps |
| Circuit Breaker Amperage | 20 Amps |
| Wire Size | 12 AWG |
| Heater Dimensions | 38.4”H x 12.2”W x 6.3”D |
| Safety Distances* | Heater: Installation & Operation Manual UKU Controller: Installation & Operation Manual |
*Reference Installation & Operation Manual for full specs/wiring diagrams/safety distances
The HUUM STEEL Mini 3.5 kW Electric Sauna Heater Package is recommended for saunas ranging from 106 - 177 ft3 (adj.).
Need assistance? Click the green chat button in the bottom right corner of your screen or call one of our Sauna Experts for help sizing your heater.
ATTENTION: Shipping and delivery times may increase based on seasons and holidays.
We will issue a 100% refund on orders canceled within 4 business days. If an order is canceled after this 4-day grace period ends, there will be a 3% cancellation fee. Please reach out to our support team if you need to cancel your order after it has shipped.
Our heaters include a 30-day return policy.
You can return this product if:
If these requirements are met, your return will be accepted. However, you will be responsible for the return shipping cost and a 20% restocking fee. After we receive the return and it has been inspected at our warehouse, we will refund your original payment method in accordance with the policy listed above.
The HUUM STEEL brings exceptional heat and steam to create the optimal environment for rest and relaxation in your sauna. The minimalist design empowers the stones with top-tier airflow, bringing gentler steam for a pleasant sauna experience.
HUUM STEEL Mini will require 240V/1PH electrical line. In case you want to wire with 208V, the power output will go down by 25%. You will need a 20 Amp circuit breaker and your electrician needs to use wire size 12 AWG. You can see the wiring diagram for the system here.
This HUUM STEEL sauna heater is suitable for small home saunas up to 177 adjusted cubic feet. Use our calculator or contact if you want to verify the size of your sauna.
We'll check your order details to ensure everything's in place for your heater setup.
You'll receive an email with an estimated lead time and any manuals you'll need.
Our support team is available for any technical questions or guidance post-delivery.
We visited the HUUM factory and made some helpful content for you. Watch our unboxing video and learn more about the Cliff.
How It Works
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Our sauna experts are here to help.
If you have any questions about HUUM, call our toll-free number (725) 777-5484 or talk us on the chat found on the bottom right corner.
Not sure about the sizing of the heater? Use our sauna heater calculator to find out.
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