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Humm STEEL Mini Series 3.5kW Sauna Heater

(Call Us At 1-844-240-9233 For More Infos) The compact STEEL Mini electric heater with extremely short safety distances is a wall-mounted model that is especially suitable for small steam rooms. Thanks...

Vendor: Huum

(Call Us At 1-844-240-9233 For More Infos)

The compact STEEL Mini electric heater with extremely short safety distances is a wall-mounted model that is especially suitable for small steam rooms. Thanks to the well-optimized design the safety distances of STEEL Mini from the walls are only 5 cm. STEEL Mini is a narrower version of the STEEL 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)


STEEL Mini 3.5 Specs:


STEEL Mini 3.5
    • Sauna room: 3,5-6 m³
    • Stone capacity: 60 kg
    • Watts: 3500
    • Volts: 240
    • Amps: 14.58
    • Fuse: 16 A
    • Phase: 1PH
    • Supply voltage 1-phase: 230 V 1N
    • Cable: 3 x 2,5 (N x mm²)


    Safety Distance:


    STEEL Mini 3.5
    • A - 50 mm
    • B - 420 mm


    Package Contents:

    • 3.5kW sauna heater
    • Wall fastening bracket
    • Installation and operation manual
    • 5-Year limited warranty (excluding elements)


    Respect for space

    STEEL heater was developed with small home saunas and space saving in mind. Therefore it has a very slim design and significantly reduced safety distances from the walls. The small safety distances are achieved by optimizing the structure and placement of the internal air tunnel. However, the compactness does not come at the expense of efficiency. The internal air tunnel placed in the center of the heater provides effective airflow, speeds up the heating process by 25% and prolongs the lifespan of the heating elements.

    Our Scandinavian outdoor saunas, shipped from our Canadian warehouse, are delivered right to your curb. We'll call you when your sauna is ready to ship and then email you the tracking details. The transport company will then contact you to schedule delivery once it reaches their local terminal.

    Included with the delivery:

    Sauna Crate

    You'll receive a crate with the sauna materials. The delivery driver may assist in lowering the crate, but you'll need tools to open it and at least two people to unload the components. This typically takes about 30 - 45 minutes.

    Glass Window (if applicable): 

    If you've ordered a special glass back, it'll arrive on a separate pallet. We try to synchronize the delivery of both items, but they may come separately. Check and note any missing items on delivery paperwork.

    Sauna heater, rocks and controls:

    When shipped with your sauna, they will arrive on a separate pallet. If they’re shipped directly from the manufacturer, we'll provide tracking information and coordinate the delivery timing of the heater with your sauna.


    Basic sauna accessories will arrive with your sauna. Other items like LED lights or salt panels are shipped separately and may arrive without needing a signature.

    Delivery Paperwork:

    Before signing, ensure all items listed are received and take photos of the crate/pallets. This helps us assist you if there are missing or damaged items.

    * If you're located in a remote area or a place where standard delivery trucks might have difficulty accessing, please inform us. We'll work out a specialized delivery plan for you, though this may require additional shipping charges. *

    Please watch this video below for an example of our curbside delivery procedure:

    How To Receive Delivery & Unload Our Scandinavian Barrel Sauna (7x8)

    We're committed to keeping our prices and inventory levels accurate for you. But hey, we're only human, and occasionally something might slip through the cracks. If you have any questions or spot something amiss, our Sales and Customer Service teams are just a message away. Don't hesitate to contact us for any clarifications or assistance!

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