Finnish Heater Makers Mondex and Narvi Preview 2026 Product Updates

Two of Finland's most respected heater manufacturers, Mondex and Narvi, are rolling out product updates for 2026 that show two different ways of thinking about what a sauna heater should be.

Mondex: Faster Heating, Better Efficiency

Mondex, a Sauna from Finland member company known for its design-forward heaters, is launching updated versions of its popular Teno and Kalla models this spring. The updates focus on the internals: new technical solutions that heat the stones faster, use less energy, and give the bather more time to actually enjoy the session rather than waiting for the room to come up to temperature.

Mondex has been pushing the design envelope in recent years. Their Rakka heater, which wraps natural stones around the exterior of the heating body, is one of the most visually striking heaters on the market. The company also launched WiFi-controlled heaters in 2022, making it one of the earlier Finnish manufacturers to embrace smart connectivity.

Narvi: Tradition First

Narvi takes a different approach. The company's philosophy starts with the basics: a well-ventilated wood room, heat from stones, and loyly (the steam created when water hits hot rocks) that lets you control both temperature and humidity. Their heater designs prioritize stone mass and airflow over flashy features.

The contrast between Mondex's tech-forward approach and Narvi's traditionalist stance is a healthy dynamic in the Finnish heater market. Both companies are producing excellent heaters; they just disagree about how much technology belongs in a sauna room. That's a debate the industry will be having for a long time.