6
Use the wedges to keep the casting
tube of the ventilation unit in place
and make a seal around it using special
construction foam.
The casting tube must be shortened on
both sides, flush to the finished wall.
Use the cutoff piece of the casting tube
as a template when shortening the
ventilation unit to size.
Caution: Do not damage the cable.
Remove the ventilation unit after the
foam has hardened.
Inside
Inside
Inside
Insert the shortened ventilation unit
from the inside as far as it will go into
the casting tube.
Make sure that the fans are pointing
toward the outer side.
Inside
