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HUUM

STEEL SERIES MINI 4 | Wall Mount Sauna Heater With Digital Control & Stones | By Huum

STEEL SERIES MINI 4 | Wall Mount Sauna Heater With Digital Control & Stones | By Huum

$3,099.97 USD
$3,099.97 USD
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Shipping calculated at checkout.
Power (KW)

HUUM Steel Mini 4 · 3.5 kW Wall-Mount · 133 lbs Stones · Internal Air Duct · 25% Faster Heat-Up · Short Safety Distances · 5-Year Warranty · Made In Estonia

Wall-Mounted 3.5 kW High-Grade Stainless Steel 🪨 133 lbs Stone Capacity 💨 Internal Air Duct — 25% Faster Heat-Up Direct Stone-to-Element Contact Exceptionally Short Safety Distances 🛡️ 5-Year Limited Warranty 🇪🇪 Made In Estonia

The HUUM Steel Mini 4 is a 3.5 kW wall-mounted stainless steel sauna heater engineered specifically for compact sauna spaces. Exceptionally short safety distances mean it installs cleanly where a larger heater won't fit. Despite the compact form, 133 lbs of stones in direct element contact produces longer, milder, more consistent heat than its size suggests. The internal air duct delivers heat-up times 25% faster than conventional heaters of equivalent output. Made in Estonia. 5-year limited warranty.

3.5 kW. 133 lbs of stone. 25% faster heat-up. The HUUM Steel Mini 4 — compact space, no compromise on the sauna experience. 🌿

💨
Internal Air Duct — 25% Faster Heat-Up In A Compact Form
The Steel Mini 4 carries the same internal air duct technology as the full HUUM Steel Series. Airflow channelled through the heater internals improves convective heat transfer through the stone mass — reducing time-to-temperature by up to 25% compared to conventional heaters. In a compact sauna where faster heat-up is a daily convenience, this makes a meaningful practical difference every session.
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Output
3.5 kW
🪨
Stone Capacity
133 lbs
💨
Heat-Up Speed
25% Faster
🛡️
Warranty
5 Years

HUUM Steel Range — Mini vs Full Series

✅ This Model — Compact
Steel Mini 4
3.5 kW · Wall-mount · 133 lbs · Short safety distances · Compact sauna specialist
Compact · 3.5 kW
Also Available — Full Series
Steel Series
Higher kW range · Larger stone capacity · UKU + Stones included · Larger room coverage
💨 Internal air duct — 25% faster heat-up — the same duct technology as the full Steel Series. Channels airflow through the heater internals, improving convective heat distribution and reaching session temperature up to 25% faster. A meaningful daily convenience in a compact sauna.
🪨 133 lbs stone capacity — direct element contact — generous for a 3.5 kW compact heater. Direct stone-to-element contact maximises heat transference, producing longer-lasting heat retention and more abundant steam throughout the session.
📐 Exceptionally short safety distances — compact sauna specialist — minimal clearance requirements make the Mini 4 the right choice for saunas where bench layout and wall proximity leave little installation room. Installs cleanly without compromising the usable interior.
🧱 Wall-mounted — 3.5 kW — preserves all floor space. Output matched to compact sauna volumes — brings a small sauna to temperature quickly without oversizing the heater for the space.
🏗️ High-grade stainless steel — industrial-quality elements — 5-year warranty — built for reliable long-term performance in regular daily use. 5-year limited warranty — the strongest coverage in the FR33DOM compact heater range.
🇪🇪 Made in Estonia — manufactured to HUUM's precision engineering standards. The same production quality applied across the full HUUM range.
Brand / Model HUUM — Steel Mini 4
Manufacturing Made in Estonia
Installation Wall-mounted
Output 3.5 kW
Construction High-grade stainless steel
Heating Elements Industrial-quality — direct stone contact
Air Duct Internal — 25% faster heat-up
Stone Capacity 133 lbs
Safety Distances Exceptionally short — compact sauna compatible
Warranty 5-year limited warranty
🛡️ 5-Year Limited Warranty
The HUUM Steel Mini 4 carries a 5-year limited warranty — among the strongest in the FR33DOM heater range. Contact us for full warranty terms and conditions.

🚚 Delivery estimated within 10 business days. Shipping costs calculated at checkout.

⚡ 3.5 kW · 🪨 133 lbs Stones · 💨 25% Faster Heat-Up · 🧱 Wall-Mount · 📐 Short Safety Distances · 🛡️ 5-Year · 🇪🇪 Estonia

HUUM Steel Mini 4 — Compact Space. Full HUUM Performance. 🔥

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