Electric Finnish sauna heaters

How to choose a Finnish sauna heater

Output and sauna volume

Heater output is chosen according to the sauna's volume. The manufacturer specifies the room size for each model. Glass, stone or other uninsulated surfaces absorb more heat, so you may need a more powerful heater.

Controls

Some heaters have built-in controls, while others require a separate control panel. The panel must be compatible with the heater and its output.

Electrical connection

Lower-output heaters are often single-phase, while higher-output models require a three-phase supply. The manufacturer specifies the exact requirements, and the connection must be made by a qualified electrician.

Installation

The heater is wall-mounted or floor-standing, with the manufacturer's safety distances to walls, benches and ceiling.

Want a humid sauna too? Choose a Combi or Bi-O heater with a vaporizer. For heaters without built-in controls, see our Finnish (dry) sauna control panels. Contact us with your sauna dimensions and we will help you choose the right heater.

Frequently asked questions

What heater output do I need?

It depends on the sauna volume and the wall and ceiling materials. Send us your dimensions and we will choose a model based on the manufacturer's recommendations.

Can I pour water on an electric sauna heater?

Yes, you can pour water on the stones, just like in a traditional sauna. Heaters without a vaporizer have no separate water tank.

What is the difference between a Finnish and a Combi heater?

A Finnish heater is designed for a dry sauna, while a Combi or Bi-O heater has a vaporizer and also offers a humid mode.

Information last checked 2026-11-03