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When heating the sauna heater for the first time, the sauna room should be ventilated properly as a new heater releases
some odour. Furthermore, when preheating the sauna with the full sauna bathing power on as indicated above, let the
temperature settle for an hour (with 0.3 kW simmering mode on). After that, switch the full bathing power on again and
leave the lid open for about an hour. Now the sauna heater is ready for bathing.
More effective ventilation than usual may be necessary for the first couple or so heating times, especially if there's
odour.
Choose the 0.2 kW or 0.3 kW for a simmering level. The volume of the sauna room is a good indicator: 0.2 kW is
enough for up to 7 m³ and 0.3 kW for spaces over 7 m³. Also the number of sauna bathing sessions should be taken into
account when choosing the simmering level.
When on standby mode (simmering level) the lid should be closed.
If you take a sauna bath only once a week or less frequently, you can use the 0.1 kW simmering level. In this case
the sauna heater must be preheated before taking a sauna bath. The preheating time depends on the heater output: 3.4
kW/1 hour, 4.8 kW/40 min, 6.4 kW/30 min and 8kW/20 min.
The simplest way to preheat a sauna heater to standby mode is using the lid control. Refer to the control panel operating
instructions. Lid control is a very easy way to use the heater.
If you don't want to use the standby mode, you can also heat the sauna heater up by using the full sauna bathing power
level. Even though heating takes longer than heating a regular sauna heater, it doesn't use much more energy and the
sauna room is ready for bathing for the entire evening.
Alternatively, you can keep the Saunatonttu sauna heater always ready by having low power on or using the lid control.
TAKING A SAUNA BATH
When you start bathing, the temperature is first "as it is", because this model doesn't preheat the sauna room air like a
traditional heater does. This way the moisture in the air moistens your skin and makes breathing easy. Enjoy the smooth
steam!
When the Saunatonttu sauna heater is on standby mode, you don't need to plan for taking a sauna bath, because you'll
only need to switch the bathing mode on and the sauna is ready. You can adjust the temperature and moisture to your
liking by throwing water on the stones.
If the sauna room heats up too much, you can either close the lid or turn the sauna bathing mode off and enjoy the stored
heat in the stones.
Always check the sauna room before switching the sauna heater on to make sure it is fit for bathing.
The Saunatonttu heater can be adjusted for different tastes. The large volume of stones enables bathing in a low
temperature (~60-65 °C), which ensures adequate moisture in the sauna room air. Traditionally low temperatures allow
enjoying the sauna bath without suddenly feeling you “need some air”, and the steam feels relaxing and soft. According
to current knowledge, a recommended sauna bathing temperature is below 70 °C. The moisture and oxygen content in
the air are interrelated depending on the temperature. In temperatures from 55 to 60 °C, changes in these contents are
relatively low. In temperatures over 60 °C the moisture content begins to drop and will drop rapidly as the temperature
rises. In temperatures over 70 °C it is not possible to have a pleasantly soft sauna bath because there isn't enough
moisture in the air.
Those who prefer a dry and hot sauna bath in a temperature over 70 °C can heat the sauna room by leaving the lid open
and turning the full sauna bathing level on. The heating time depends on the room's heat demand. For a hot bath, the
volume (m³) of the sauna room cannot be greater than 1.6 times the heater output (example: 1.6 x heater output 6.4 kW
= 10 m³) . The walls and the ceiling should also have adequate thermal insulation.
The sauna room ventilation must adhere to the instructions; a fresh air intake valve (conical valve) above the sauna
heater (to allow heating of the sauna room's lower parts) and an exhaust valve near the floor (to keep the heat in the
sauna room). The door must also be insulated.
