How do I calculate the right sauna heater size?
Input your sauna dimensions, insulation quality, and uninsulated area. The calculator determines the correct heater size based on effective heating volume.
What's effective heating volume?
Unlike geometric volume, effective volume accounts for heat loss from insulation, uninsulated areas, and installation type to match how manufacturers specify their heaters.
Which heater brands are included?
Harvia, HUUM, Saunacore, Finnleo, and Tylö heaters with specifications, volume ranges, and electrical requirements.
What electrical requirements do I need?
Most electric sauna heaters require 240V hardwired installation. The calculator shows specific amperage, breaker, and wire gauge requirements for each heater.
How does insulation affect heater size?
Better insulation reduces heat loss. The calculator applies multipliers: excellent (1.0x), good (1.1x), poor (1.3x), none (1.5x).
What makes perfect löyly?
The right heater creates the conditions. But löyly... that's the ancient dance of water meeting stone, releasing the sauna's soul.