Helo Hanko STJ 6 kW & 8 kW Electric Sauna Heaters with Built-in Controls

Helo Hanko STJ 6 kW & 8 kW Electric Sauna Heaters with Built-in Controls

Traditional yet modern Hanko is Helo’s most popular electric sauna heater, which is not surprising: it’s compact and lightweight but still carries an impressive amount of stones for its size, 70 lbs, for perfectly soft and pleasant löyly (steam).

In addition, sauna-goers love that it heats up quickly and features a stylish honeycomb design that also produces more even heat than the more typical wall-mounted heaters that have an enclosed casing.

Its built-in controls allow you to set the thermostat and use a 12-hour timer, with a continuous operating time of 3 hours.

Helo Hanko comes in two sizes, 6 kW and 8 kW, and in two colors, chrome and black.

This heater is also known for its quick and easy installation, thanks to clear, step-by-step instructions and integrated mounting brackets.

If your sauna room layout calls for it, the heater controls are reversible, meaning they can be moved from one side to the other.

The model is named after where it’s made: Hanko, Finland. It’s handmade from the best materials and is the result of a collaboration between master designers.

Capacities & Dimensions

Helo Hanko, 6 kW

• For sauna rooms from 177 to 318 cubic feet
• Heating capacity: 6,000 watts
• Stone capacity: 70 lbs
• Dimensions: 14.5 W × 10 D × 23 H in (365 × 250 × 575 mm)
• Heater weight without stones: 16 lbs

Helo Hanko, 8 kW

• For sauna rooms from 283 to 424 cubic feet
• Heating capacity: 8,000 watts
• Stone capacity: 70 lbs
• Dimensions: 14.5 W × 10 D × 23 H in (365 × 250 × 575 mm)
• Heater weight without stones: 17 lbs

🔶 Not sure about sizing? Use our sauna heater size calculator.

Electrical Specifications

• Built-in time & temperature controls
• Voltage & phase: multiple wiring options, out of which 230–240V 1N~/ 2~ is compatible with US 240V split-phase power

⚠️ Installation by a professional electrician is required.

Please have your electrician study the wiring diagram already before purchasing. (It’s included in the product pictures and the manual.)

📄 Installation manual: Helo Hanko STJ

Clearances to Combustibles

Helo Hanko, 6 kW

• Ceiling clearance: 51 in (1 300 mm)
• Side clearance: 3 in (70 mm)
• Front clearance: 4 in (100 mm)
• Floor clearance: 4 in (100 mm)

Helo Hanko, 8 kW

• Ceiling clearance: 51 in (1 300 mm)
• Side clearance: 4 in (100 mm)
• Front clearance: 6 in (150 mm)
• Floor clearance: 4 in (100 mm)

Features

• 2-year warranty in home use
• Made in Finland
• CE-certified
• Color: chrome or black
• Material: steel
• Wall-mounted
• 3-hour timer & 9-hour delay timer function
• Reversible heater controls
• Stone size: Ø 2–4 in (5–10 cm), required for operation & sold separately

🔶 Need sauna stones? As they’re hard to find in the US & expensive to ship, we’ve partnered with North Shore Sauna that sells proper sauna stones mined in Minnesota & offers free shipping for orders over $100. When you buy through us, we get a commission and you get a discount code: if you buy six or more boxes, you get $50 off with the code SAUNAIS50.

Complete your setup: Buy real sauna stones

Shipping & Returns

🔸 Free shipping & no surprise charges: we handle all duties, taxes & customs fees.

🔸 Your order arrives damaged? No worries, our shipping policy has you covered.

🔸 Changed your mind? Returns are possible for unused items; return shipping costs apply.

🔸 Support: We’re here to help if you have any questions before or after purchase.

See full details: Shipping & Returns • Contact • Why Buy from Us