
Description
Description
This is the complete Narvi Flow Wi-Fi control system for larger electric sauna heaters rated from 11 to 18 kW, pairing the standard Flow package with a power extension unit that handles the higher switching load. The set includes the Flow Wi-Fi control panel, the main power unit, the temperature and safety sensors, a door switch for safe remote operation, and the 11–18 kW power extension unit, which makes it the right choice for larger cabins and for commercial or communal saunas. Control stays effortless: start the heater at once or on a timer, set the temperature between 40°C and 115°C, and run everything remotely through the free Narvi Flow app on iOS or Android. The three physical buttons work even with wet fingers, sauna lighting of up to 100 W connects through the controller, the IPX5 panel installs inside or outside the sauna room, and Easy Mode and On/Off-Mode restrict functions for hotels, rentals and communal facilities.
Features
Technical Specification
| Suitable heater output | 11–18 kW |
| Electrical connection | 400V 3N~, 50/60 Hz |
| Maximum fuse | 3 × 32 A |
| Minimum supply cable | 5 × 6 mm² |
| Temperature range | 40–115°C |
| Wi-Fi network | 2.4 GHz |
| Protection class | IPX5 |
| Lighting output | Max 100 W (230V 1N~) |
| Control panel dimensions (H × W × D) | 88 × 88 × 23 mm |
| Power unit dimensions | 175 × 250 × 100 mm |
| Power extension unit dimensions | 175 × 250 × 100 mm |
| Control panel cable | 6 m |
| Power extension unit cable | 0.5 m |
| Temperature sensor | Narvi sensor with overheat protector, 60 × 60 × 20 mm, 6 m cable |
| Door switch | Included, with 5 m cable |
| Ambient temperature (control panel) | −10 to 80°C |
| Ambient temperature (power unit) | −10 to 60°C |
| Ambient temperature (power extension unit) | −10 to 30°C |
| Humidity sensor | Optional accessory |
What is included
The set comprises the Flow Wi-Fi control panel with 6 m cable, the main power unit, the 11–18 kW power extension unit with 0.5 m cable, the Narvi temperature sensor with overheat protector and 6 m cable, the door switch with 5 m cable and the fixing accessories. A router, mobile device and the heater itself are not included.
Installation
The controller is wired in by a certified electrician and must not be connected through a residual current device (RCD). The control panel may be installed inside or outside the sauna room; in the sauna it mounts no higher than 100 cm and at least 70 cm from the heater. The power extension unit must not be installed in the steam room. Remote operation requires a heater that meets the fire safety requirements of EN 60335-2-53 (clauses 19.101 and 19.102) or an appropriate safety device such as the included door switch, along with a reliable 2.4 GHz Wi-Fi connection. The installation manual and local wiring regulations must be followed.
Brand
Narvi is a Finnish manufacturer of sauna heaters and control equipment, based in Lappi, Finland. Narvi equipment is CE tested and carries the Finnish Key Flag as a mark of genuine Finnish design and manufacture.
Ordering note
Check your heater model, its rated output and, where relevant, the controller generation before ordering. Electrical installation and replacement of control equipment must be carried out by a certified electrician.
Downloads
Delivery & Returns
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
Description
This is the complete Narvi Flow Wi-Fi control system for larger electric sauna heaters rated from 11 to 18 kW, pairing the standard Flow package with a power extension unit that handles the higher switching load. The set includes the Flow Wi-Fi control panel, the main power unit, the temperature and safety sensors, a door switch for safe remote operation, and the 11–18 kW power extension unit, which makes it the right choice for larger cabins and for commercial or communal saunas. Control stays effortless: start the heater at once or on a timer, set the temperature between 40°C and 115°C, and run everything remotely through the free Narvi Flow app on iOS or Android. The three physical buttons work even with wet fingers, sauna lighting of up to 100 W connects through the controller, the IPX5 panel installs inside or outside the sauna room, and Easy Mode and On/Off-Mode restrict functions for hotels, rentals and communal facilities.
Features
| Suitable heater output | 11–18 kW |
| Electrical connection | 400V 3N~, 50/60 Hz |
| Maximum fuse | 3 × 32 A |
| Minimum supply cable | 5 × 6 mm² |
| Temperature range | 40–115°C |
| Wi-Fi network | 2.4 GHz |
| Protection class | IPX5 |
| Lighting output | Max 100 W (230V 1N~) |
| Control panel dimensions (H × W × D) | 88 × 88 × 23 mm |
| Power unit dimensions | 175 × 250 × 100 mm |
| Power extension unit dimensions | 175 × 250 × 100 mm |
| Control panel cable | 6 m |
| Power extension unit cable | 0.5 m |
| Temperature sensor | Narvi sensor with overheat protector, 60 × 60 × 20 mm, 6 m cable |
| Door switch | Included, with 5 m cable |
| Ambient temperature (control panel) | −10 to 80°C |
| Ambient temperature (power unit) | −10 to 60°C |
| Ambient temperature (power extension unit) | −10 to 30°C |
| Humidity sensor | Optional accessory |
What is included
The set comprises the Flow Wi-Fi control panel with 6 m cable, the main power unit, the 11–18 kW power extension unit with 0.5 m cable, the Narvi temperature sensor with overheat protector and 6 m cable, the door switch with 5 m cable and the fixing accessories. A router, mobile device and the heater itself are not included.
Installation
The controller is wired in by a certified electrician and must not be connected through a residual current device (RCD). The control panel may be installed inside or outside the sauna room; in the sauna it mounts no higher than 100 cm and at least 70 cm from the heater. The power extension unit must not be installed in the steam room. Remote operation requires a heater that meets the fire safety requirements of EN 60335-2-53 (clauses 19.101 and 19.102) or an appropriate safety device such as the included door switch, along with a reliable 2.4 GHz Wi-Fi connection. The installation manual and local wiring regulations must be followed.
Brand
Narvi is a Finnish manufacturer of sauna heaters and control equipment, based in Lappi, Finland. Narvi equipment is CE tested and carries the Finnish Key Flag as a mark of genuine Finnish design and manufacture.
Ordering note
Check your heater model, its rated output and, where relevant, the controller generation before ordering. Electrical installation and replacement of control equipment must be carried out by a certified electrician.
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.









