HUUM STEEL 11 — Slim Electric Sauna Heater (10.5kW)

Engineered for maximum performance in minimal space, the HUUM STEEL 10.5kW Sauna Heater delivers powerful heating capacity in a sleek, ultra-slim profile. Designed for sauna rooms between 354 and 566 cubic feet, this floor-standing electric heater is ideal for modern spaces, compact rooms, and installations requiring reduced safety distances.

The STEEL Series features HUUM’s advanced internal air duct system, allowing the heater to warm up to 25% fasterwhile maintaining exceptional heat distribution and efficiency. With a large 331-pound stone capacity, the heater produces long-lasting, soft, and balanced steam that mimics the feel of a traditional wood-burning sauna — but with the convenience of electric power.

The STEEL 10.5 works with HUUM UKU Controls, giving users precise command over temperature, scheduling, safety, and heating modes. Built from premium stainless steel and crafted in Estonia, this heater combines modern engineering with timeless sauna tradition.

• Slim Space-Saving Design: Ideal for smaller or restricted sauna layouts

• Reduced Safety Distances: Just 4" (10 cm) clearance required for this model

• Fast Heating Performance: Internal air duct speeds heat-up time by up to 25%

• 331-Lb Stone Capacity: Enhances radiant heat and produces rich, mild steam

• Direct Stone-to-Element Contact: Increases efficiency and heat transfer

• Works with HUUM UKU Controls: Local, Wi-Fi, or specialty panel options (sold separately)

• Compatible With UKU Extension Box: Required for heaters 10.5kW and above

• Premium Stainless Steel Construction: Long-lasting and corrosion resistant

• Industrial-Grade Heating Elements: Designed for reliability and longevity

• Floor-Standing Installation: Stable and modern vertical column design

• Crafted in Estonia: Authentic European heater engineering

• HUUM STEEL 10.5kW Sauna Heater

• Installation & Operation Manual

• 3-Year Residential Warranty

• 1-Year Commercial Warranty (Excluding Elements)

Required for Operation (Sold Separately)

• HUUM UKU Control System (choose one):

  • HUUM UKU Local — Hard-wired control panel for direct local operation

  • HUUM UKU Wi-Fi — Remote app-controlled heating

  • HUUM UKU Glass — Premium glass-faced Wi-Fi control

  • HUUM UKU Mirror — Mirror-finished Wi-Fi panel

  • HUUM UKU Gold — Luxury gold-finished Wi-Fi control

• HUUM UKU Extension Box — Required for heaters 10.5kW and above

• HUUM Stones 24 (10 Boxes Required) — Rounded olivine stones for steam generation and heat retention

Manual Links:

• HUUM Warranty

• HUUM Steel Spec Sheet

• HUUM Steel IOM Owners Manual

• HUUM Required Elements

• HUUM Certificate of Compliance

• HUUM Stone Requirements

• Sizing Your HUUM