1�9 Moisture Barrier Against Cold Timber Frames - Swegon CASA r85 Installation, Operation And Maintenance Manual

1.9 Moisture barrier against cold timber
frames
It is important that the moisture barrier between cold stud
work and the warm ceiling maintains its tightness at duct
penetration points� A duct penetration piece (optional extra)
will facilitate this� This item is available in sets of 5 for size
100, 125 and 160 mm dia� ducts� It can be fastened with tape
in the moisture barrier�
We recommend the use of a mounting frame (optional extra)
for sealing the moisture barrier in the attic tie beams�
Cut up the openings with approx� 10 mm smaller diameter
than that of the ducts� Secure the mounting frame in the
ceiling with screws through the holes on the sides� The plastic
film of the moisture barrier should either be stretched and
fastened between the mounting frame and the structural ele-
ment of the building, or be taped tightly against the mounting
frame�
Swegon reserves the right to alter specifications.
The thickness of the insulation and
the nature of the surface layer of the ven-
tilation ducts vary depending on insulation
material, climate zone and national stand-
ards in force. For this reason, Swegon does
not offer any general recommendations.
Most manufacturers of insulation material
offer calculation programs for the calcula-
tion of sufficient and correct insulation.
In renovation projects, it is advisable to
examine the existing ducts to determine
whether they are sufficiently and correctly
insulated. Insulating in the right way is
necessary for the ventilation unit to oper-
ate correctly.
R85B.161012
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