5.
Install the ventilation duct to match the Ø150 hole with the hole
in the mounting frame. Fasten the duct with the bend fasteners using
self-drilling screws.
6.
Lay the first layer of insulation. For the time of
construction, secure the ventilation duct opening with
a cover.
7.
Lay the second layer of insulation.
8.
Lay the third layer of insulation.
9.
After the construction work is completed, unscrew
the cover and install the ventilation grille.
5
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User’s manual
HRU-WALL-WREV
