Collection: Sauna Heater Size Calculator
Sauna Heater Size Calculator
Enter your sauna room dimensions and construction details to find the perfect heater size in kilowatts (kW).
How to Size a Sauna Heater
Choosing the right sauna heater size is essential for achieving proper temperatures and efficient operation. An undersized heater struggles to reach target temperatures, while an oversized unit wastes energy and may overheat your space.
For electric heaters, plan for approximately 1 kW per 50 cubic feet of sauna space. Wood-burning stoves typically need 1.5x this amount. Always factor in construction variables like insulation, glass surfaces, and outdoor exposure.
Factors That Affect Heater Sizing
Beyond basic room volume, several construction factors influence your heater requirements. Glass doors and windows add thermal load since glass doesn't insulate as well as walls. Outdoor saunas need more power to compensate for heat loss. Poor insulation or concrete/masonry walls require additional capacity.
Electric vs Wood-Burning Heaters
Electric heaters offer precise temperature control, easier installation, and lower maintenance. They're ideal for indoor saunas and urban settings. Wood-burning stoves provide the authentic Finnish experience with that distinct wood-fired ambiance, but require proper ventilation, chimney installation, and regular wood supply.
Need Help Choosing a Heater?
Our sauna specialists can help you select the perfect heater for your specific installation and preferences.
