Air Oasis 9 - Manual (Page 4)

If you do not have a hole saw tear this page off and cut the
circle out. Then place on the ductwork in desired position
and trace the rectangle. Drill holes as indicated and then
use a jig saw or metal cutting snips to cut out the circle.
Step 3
Insert unit into
pre-cut hole.
Step 4
Drill the metal
tapping screws in to
hold unit in place.
Cut Out