Narvi Ultra Small Flow (Wi-Fi) 6 kW & 9 kW Electric Sauna Heaters

Narvi Ultra Small Flow (Wi-Fi) 6 kW & 9 kW Electric Sauna Heaters

When you’re looking for an encased, free-standing sauna heater with an exceptionally long lifespan and digital control, Narvi Ultra Small is the right choice: the internal components are made of stainless steel, while the heating elements are specially reinforced for long service life.

Despite the name, these heaters come in 6 kW and 9 kW, being ideal for smaller and medium saunas.

Whichever variant you choose, Narvi Ultra Small comes with an external Narvi Flow control unit (four options include Wi-Fi for remote control). The controller allows you to start the heater, adjust the sauna room temperature (105–240 F), and schedule the heating start time and duration.

The controller can be installed inside or outside the sauna room, but not outdoors in freezing temperatures. Narvi Flow control unit is low voltage and is protected against splashing water (IPX5).

With the WiFi options, you can control the heater remotely together with the free Narvi Flow app (found on the App Store and Google Play). This means you can start the heater while at work, gym, or wherever, and have the sauna löyly-ready when you arrive home.

The Wi-Fi models always include a door switch for safe operation.

Narvi Flow heaters, including all Ultra Small models, are handcrafted in Lapinkylä, Finland.

Capacities & Dimensions

Narvi Ultra Small, 6 kW

• For sauna rooms from 177 to 283 cubic feet
• Heating capacity: 6,000 watts
• Stone capacity: 66 lbs
• Dimensions: 17.5 W × 12 D × 27 H in (440 × 300 × 680 mm)
• Heater weight without stones: 33 lbs

Narvi Ultra Small, 9 kW

• For sauna rooms from 283 to 494 cubic feet
• Heating capacity: 9,000 watts
• Stone capacity: 66 lbs
• Dimensions: 17.5 W × 12 D × 27 H in (440 × 300 × 680 mm)
• Heater weight without stones: 33 lbs

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

Electrical Specs & Optional Wi-Fi

• External time & temperature control (+ Remote control with Wi-Fi)
• Voltage & phase: multiple wiring options, out of which 230V 1N~/2~ is compatible with US 240V split-phase power
• Frequency: 50/60 Hz

Narvi Flow Wi-Fi remote control + free app

• Wi-Fi network: 2.4 GHz
• Turn the heater on and off remotely: Open the app on your smartphone or tablet, set the timer, and your sauna will have the desired temperature when you arrive.
• Temperature adjustment: 105–240 F (40–115 C)

Note: Remote mobile app control is available on Wi-Fi models only.

⚠️ 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: Narvi Ultra Small Flow (Wi-Fi)

Clearances to Combustibles

Narvi Ultra Small, 6 kW

• Ceiling clearance: 48 in (1 220 mm)
• Side clearance: 2 in (50 mm)
• Front clearance: 3 in (80 mm)
• Rear clearance: 3 in (80 mm)
• Floor clearance: 1.5 in (40 mm)

Narvi Ultra Small, 9 kW

• Ceiling clearance: 48 in (1 220 mm)
• Side clearance: 4 in (100 mm)
• Front clearance: 3 in (80 mm)
• Rear clearance: 3 in (80 mm)
• Floor clearance: 1.5 in (40 mm)

Features

• 2-year warranty in home use
• Made in Finland
• CE-certified
• Color: steel or black
• Material: steel (black models) and stainless steel (steel-colored ones)
• Floor model
• Continuous operating time: 15 min – 4 h
• 4-hour delay timer function
• Temperature range: 105–240 F (40–115 C)
• Temperature options: Fahrenheit or Celsius
• Language selection: English, German, Finnish & Swedish
• 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

What’s Included

• Narvi Ultra Small Flow sauna heater with integrated power unit
• Narvi Flow controller (Standard digital control or Wi-Fi digital control, based on which model you choose)
• 20 ft (6 m) cable
• Temperature sensor
• Door switch (Included with Wi-Fi models only)

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