HUUM STEEL Mini 3.5 kW 240V Electric Sauna Heater- Complete Package Options

Designed for Comfort and Wellness

What sets HUUM apart is its dedication to providing a sauna experience that enhances both physical and mental wellness. The heater’s design maximizes the release of beneficial negative ions, promoting relaxation and a sense of calm. With its superior ability to regulate heat and humidity levels, this sauna heater allows you to enjoy soothing, rejuvenating steam that wraps your body in warmth without feeling too harsh or overwhelming. Additionally, HUUM’s simple, smart control system offers both local and WiFi-enabled options, giving you the flexibility to adjust settings and schedule sessions remotely, ensuring a perfectly tailored sauna experience at your convenience.

HUUM STEEL: Compact Design, Powerful Performance

The STEEL electric sauna heater has been specifically designed for modern home saunas with limited space. Its compact size and powerful performance make it a stylish addition to any interior. The heater is compatible with the UKU sauna control system, allowing you to adjust the sauna temperature remotely. Featuring an optimized structure, the heater offers minimal safety distances and an internal air tunnel that improves airflow and speeds up heating by 25%. The large stone capacity of up to 330 lbs ensures prolonged, mild steam, while the wall-mounted STEEL Mini accommodates up to 132 lbs of stones.

• 3.5kW Sauna Heater
• Wall Fastening Bracket
• Installation and Operation Manual
• 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

• Dimensions: 12.6″ W (320mm) x 6″ D (150mm) x 38.4″ H (975mm)
• Limited 3-year warranty (excluding elements)
• Construction material: Stainless steel
• Dimensions: 12.6″ W (320mm) x 6″ D (150mm) x 38.4″ H (975mm)
• Weight: 32 lbs (14.5kg)
• Length / Width: 12.6″ (320mm)
• Width / Depth: 6″ (150mm)
• Height: 38.4″ (975mm)
• UKU Control, 133 lbs stones (Qty 4 x 33 lbs of 1″ – 2″ (3-5 cm) stones boxes)
• Package contents: 3.5kW sauna heater
  Wall fastening bracket
  Installation and operation manual

Resources- Click Links Below

HUUM Steel Manual

HUUM Steel Mini Spec Diagram

HUUM Stone Requirements

Elements Required

Huum warranty

Size Your Sauna

• Free Shipping: This order qualifies for free shipping within the contiguous United States.
• Processing Time: In-stock items typically leave the warehouse within 1–3 business days. This is the processing period before transit, not the final delivery time.
• Confirm Availability: Inventory can change quickly. Please call, text, or email NW Immersion before ordering if you need confirmation of current stock or have a specific delivery deadline.
• Multiple Packages: The heater, sauna stones, controls, and accessories may ship in separate boxes or on separate pallets. Packages may arrive on different days.
• Tracking: Tracking information will be emailed for each shipment as soon as it leaves the warehouse.
• Inspect Upon Arrival: Check every package for visible damage before accepting delivery. Photograph any damage and contact NW Immersion promptly so we can assist.

Questions about availability, delivery, heater sizing, controls, or installation requirements? Our U.S.-based sauna specialists are available by phone, text, or email.

Every HUUM electric sauna heater is designed to deliver years of exceptional sauna experiences and is supported by HUUM’s manufacturer warranty, including a 3-Year Limited Residential Warranty and a 1-Year Limited Commercial Warranty.

Built with meticulous attention to detail and premium European craftsmanship, HUUM heaters are trusted by homeowners, sauna builders, and wellness professionals worldwide. Warranty coverage may vary by use type and component, including the heater body, controls, and related electrical components. Heating elements are considered normal-wear items and are excluded from warranty coverage.

As an Authorized HUUM Dealer, NW Immersion is here to help with heater sizing, product selection, delivery coordination, troubleshooting, warranty guidance, and long-term support. Always refer to the official HUUM warranty documentation included with your heater for complete terms and final coverage details.