Old-fashioned Finnish wood stoves, also known as sauna heaters or sauna stoves, often have two windows for specific functional and safety reasons:
Airflow control: The first window, usually located at the bottom front of the stove, allows the user to control the airflow into the firebox. By adjusting the air intake through this window, you can regulate the intensity of the fire and, consequently, the amount of heat generated. Controlling the airflow is essential to maintain the desired temperature inside the sauna and to ensure efficient burning of the wood.
Viewing the fire: The second window, positioned higher up on the sauna stove door, serves the purpose of allowing the sauna-goers to enjoy the relaxing sight of the burning fire while they are inside the sauna. Watching the flames dance can enhance the overall sauna experience, providing a sense of tranquility and ambiance.
The combination of these two windows in the sauna stove design not only offers functional benefits but also contributes to the cultural and traditional significance of saunas in Finnish culture. Saunas are an integral part of Finnish life, and the act of tending the fire and experiencing the sauna's soothing heat and visuals hold deep cultural importance.
It's important to note that the design and features of sauna heaters can vary, and modern sauna stoves may have different configurations or improvements. The primary purpose remains the same: to heat the sauna effectively while providing a pleasant and relaxing experience for the users.