
HUUM Steel Mini 3.5 package: a 6 inch deep wall heater with control and stones for the smallest saunas
The HUUM Steel Mini 3.5 package pairs the wall mounted Steel Mini electric sauna heater with its control and stones for very small rooms from 123 to 212 cubic feet. Made in Estonia, the 3.5 kW heater has a slim stainless steel body. It measures about 12.6 inches wide, only 6 inches deep, and 38 inches tall, weighs 32 pounds, and needs very little clearance from the wall. An internal air duct helps it heat up to 25 percent faster. It holds 133 pounds of stones in direct contact with the heating elements.
The package includes the heater, a HUUM UKU control with its sensors and cables, and 132 pounds of rounded olivine sauna stones. The UKU lets you set the temperature from 104 to 230 degrees and schedule a start up to 48 hours ahead. On the page you choose the control: the standard UKU, or the Wi-Fi, Mirror, or Gold version that lets you start the sauna from your phone. A bucket and ladle set is optional. Have a slightly bigger room? See the floor standing HUUM Steel 6 heater package. The HUUM Steel Mini 3.5 package ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Features
STEEL Mini 3.5kW Sauna Heater
- 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)
UKU
- Sleek Black control display panel
- Multiple Color Options available (additional charges apply)
- Settable on/off, time, temperature, and delay
- Settable temperature range of 104-230F
- Delayed start up to 48hrs in advance
- Optional Built-in Wi-Fi interface for HUUM mobile app (additional charges apply)
- 8 Language options: English, German, Russian, Italian, Finnish, Estonian, Polish and French
- Inside/outside sauna room installation
- Optional smart heating setting
- Available decorative control display panels
- Displays set temperature and room temperature
- Temperature sensor
- Door sensor to keep the heat inside the room
- Remotely located main control module
- Connects to lights and ventilation
- Overheat protection
- Child safety lock
- Control Console Dimensions: 2.2″W (55mm) x 0.9″D (22mm) x 4.1″H (105mm)
- Main Control Module Dimensions: 3.5″W (90mm) x 2.3″D (58mm) x 5.6″H (142mm)
Stones 12
- Olivine diabase sauna stones
- Rounded shape to complement heater design
- Durable with high-heat capacity
- Stones range from 1″ to 2″ (3-5 cm)
Includes
STEEL Mini 3.5kW Sauna Heater
- 3.5kW sauna heater
- Wall fastening bracket
- Installation and operation manual
- 5-Year limited warranty (excluding elements)
UKU
- Black Control console
- Main control module
- Temperature sensor
- Door sensor
- Control display panel cable
- Temperature sensor cable
- Door sensor cable
- Installation and operation manual
- 5-Year limited warranty
Stones 12
- 132 lbs of 1″ to 2″ (3-5 cm) round Olivine sauna stones
FAQ
What does the STEEL Mini package include?
The wall-mounted 3.5kW heater with its fastening bracket, an UKU control system with temperature and door sensors, and 132 pounds of 1 to 2 inch round olivine sauna stones, per the includes tab – a complete small-sauna setup in one shipment.
What size sauna is it for?
Small rooms from 123 to 212 cubic feet, per the specification table – the compact end of the STEEL Mini line. It is the package to pick for one- or two-person saunas where a floor heater will not fit.
How slim is the heater?
Only 6 inches deep by 12.6 inches wide on a 38.4-inch wall-mounted column, keeping the floor completely clear. The features tab notes exceptionally small safety distances for the series, which is what makes truly tight sauna rooms workable.
What control options do I have?
The included UKU control system, with Wi-Fi optional per the description. The Sauna Heater Controls choices on this page span the UKU Local digital control and the Wi-Fi, Mirror, and Gold versions – Wi-Fi models pair with the HUUM smartphone app.
What temperature range does it offer?
The UKU control sets between 104 and 230 degrees Fahrenheit, supports delayed start up to 48 hours ahead, and shows both target and actual room temperature. A door sensor, overheat protection, and child safety lock round out the system, per the features tab.
What warranty comes with it?
A limited 5-year warranty, excluding the heater’s elements. The heater is stainless steel with industrial-quality heating elements and is designed, engineered, and made in Estonia; keep your order records in case a warranty claim is ever needed.
Shipping
The weight or packaging of this product requires delivery by special appointment, and on a wooden pallet.
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.