The Sauna Room; Insulation And Wall Materials Of The Sauna Room; Room Construction - General Information - Harvia AV-4 Instructions For Installation Manual

Note! The pin of rotatable fuses does not always fly
off when the fuse blows. The only way to make sure
that the fuses used for the heater have not blown is to
replace them.
If the rising of the sauna room temperature has slowed
down, check whether:
the level of the rock space has descended, ie, the
•
stones have disintegrated and become tighter and,
therefore, the air flow through the rock space is
partly obstructed. Reposition the rocks if necessary
and replace the 'soft' ones.

2. THE SAUNA ROOM

2.1. Insulation and Wall Materials of the
Sauna Room
In an electrically heated sauna, all the massive wall
surfaces which store plenty of heat (such as bricks, glass
blocks, plaster etc.), must be sufficiently insulated in order
to keep the heater output at a reasonably low level.
A wall and ceiling construction can be considered to
have efficient thermal insulation if:
the thickness of carefully fitted insulating wool
•
inside the house is 4" (100 mm) minimum 2"
(50 mm).
the moisture protection consists of e.g. aluminium
•
paper with tightly taped edges. The paper must be
fitted so that the glossy side is towards the inside
of the sauna.
there is a 3/8" (10 mm) vent gap between the
•
moisture protection and panel boards
(recommendation).
the inside is covered by 1/2" – 5/8" (12–16 mm)
•
thick panelling.
there is a vent gap of a few millimetres at the top
•
of the wall covering at the edge of the ceiling
panelling.
When aiming at a reasonable heater output, it may be
advisable to lower the ceiling of the sauna, (minimum height
13/16"
74 (1900 mm)). As a result, the volume of the sauna
is decreased, and a smaller heater output may be sufficient.
The ceiling can be lowered so that the ceiling joists are
fixed at a suitable height. The spaces between the joists
are insulated (minimum insulation 4" (100 mm)) and
surfaced as described above.
Because heat goes upwards, a maximum distance of
47" (1200 mm) is recommended between the bench and
ceiling.
NOTE! Consult fireextinguishing authorities to find out
which part of the fireproof wall may be insulated.
NOTE! The protection of the walls or ceiling with heat
protection, such as mineral board fitted directly on the
wall or ceiling, may cause the temperature of the wall
and ceiling materials to rise dangerously high.
2.1.1. Room construction – general information
FRAMING 2" x 4" dry Douglas Fir,
16" o.c.
CEILING HEIGHT No higher than 7' 0".
INSULATION R11 Fiberglas with foil back in walls
and ceiling, foil facing into room.
DRYWALL See local codes. Is not required
in most residences. See local codes
for commercial. If drywall is used,
apply 1" x 2" nailers so that wall
and ceiling boards can be attached
to solid wood.
PANELING Use kiln-dried, clear, T & G softwood
such as California Redwood,
Western Red Cedar, Alaska yellow
Cedar, with moisture content not
exceeding 11%.
BENCHES Use matching wood of vertical
grain with 2"x 2" tops – 1/2"
spacing – and 2"x 4" facing,
fastening from bottom to prevent
burning of bathers.
HEATER
GUARDRAIL Use matching softwood of 1" x 2"
or 2" x 2".
DOOR Must open out and should not have
a lock. Size – 2' 0"x 6'8" with fir
rails and double sealed tempered
glass.
ROOM LIGHT Should be a vapor proof, wall
mounted type, with rough-in box
munted flush with inside paneling.
It should mount 6" (150 mm) from
ceiling, not directly over the Sauna
heater, and not over upper
benches; light bulb should not
exceed 75 watts.
Note! Receptacles OR PLUGS are not allowed in a Sauna
room. If a speaker is installed in a Sauna room, it should
not be installed higher than 3' from floor, away from
the Sauna heater (consult manufacturer for ratings).
Figure 4. Sauna room
7.