Insulation; Air Ventilation - Sawotec MN-23NS Manual

INSuLATIoN

The sauna must have proper insulation on the walls, ceiling and door. One square meter (m²) of
uninsulated surface increases the cubic volume by approximately 1,2m³ when determining the
power requirement of the heater. See page 11.
Ensure that moisture proofing is appropriate in sauna room. The purpose of this is to prevent
spreading of moisture to the other rooms or wall structure. Moisture proofing must be placed
between heating insulation and panel. Nordic spruce wood is recommended for the walls and ceiling
inside the sauna.
Thermal and moisture proofing need to be installed according to the following order from outside
to inside
1. The recommended minimum thickness of the thermal insulation in the walls is 50 mm and in
the ceiling 100 mm.
2. It is possible to use carton- or aluminum foil laminate as a vapor barrier, which is affixed over
the insulation aluminum foil inwards.
3. Leave at least 20 mm air slot between vapor barrier and inside panel
4. To prevent gathering of the moisture behind the panel leave the slot between wall panel and
ceiling.

AIR VENTILATIoN

To have a soothing sauna, there should be a proper mixing of hot and cold air inside the sauna
room. Another reason for ventilation is to draw air around the heater and move the heat to the
farthest part of the sauna. The positioning of the inlet and outlet vents may vary depending on the
design of the sauna room or preference of the owner.
The inlet vent may be installed on the wall directly below the heater (Fig A). When using the
mechanical ventilation, the inlet vent may be placed at least 60 cm above the heater (Fig B) or on
the ceiling above the heater. Through these positions, the heavy cold air that is blown into the sauna
is mixed with the light hot air from the heater, bringing fresh air for the bathers to breathe. The inlet
and the outlet vent must have a diameter of 10cm.
The outlet vent should be placed diagonally opposite to the inlet. It is recommended that the outlet vent
be placed under the platform in a sauna as far as possible from the fresh air vent. It may be installed
near the floor, or led outside through a pipe from the floor going to a vent to the sauna ceiling, or under
the door (to the washroom). In this case, the sill slot must be at least 5 cm and it is recommended that
there is mechanical ventilation in the washroom. The size of the exhaust should be twice that of the inlet.
Abb. 7
Belüftung
Air ventilation
Fig. 7
A B C
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ENGLISH