AirScape 2.5e Whole House Fan Installation Manual, 03152016
©AirScape, Inc., 2016. All Rights Reserved.
Page 5
Position the 2.5e damper enclosure on top of the joists
so that the damper doors are aligned with the framed
rough opening, as shown at right in Figure 4.
Make sure
there is easy access to the electrical box located on the
side of the unit.
The actuator end of the damper box has two “key holes”
which are used to attach the damper box to the joists.
Mark the location of the “key holes” on the joists by plac-
ing the damper box over the rough opening. Remove
the damper box and fasten two of the provided wood
screws so that the screw head is slightly above the joist.
Position the damper box over the “key holes” and slide
to lock into position. Use the remaining screws to attach
the opposite side of the damper box.
If installing the damper vertically in a wall, frame a box with the same dimensions as above. However, use
longer wood screws than those provided (at least 1½˝ ) to mount the damper to the framing, and make
sure the damper door(s) open about their vertical axis. Also, consider bracing the underside of the damper
with additional framing.
Use a good quality latex caulk to seal all wood-to-wood and wood-to-metal joints to create an airtight
enclosure. This is important to ensure that all air drawn in by the fan will be from inside the house.
From below, attach the interior grille to the joists with the included wood screws.
INSTALLATION: BACKDRAFT DAMPER
Figure 4
INSTALLATION: BACKDRAFT DAMPER COLLAR
First, remove the two screws holding damper collar in place for shipping and flip collar.
Then, position the collar over the damper box opening and fasten the two together using 2 screws in the
holes at the top of the collar as shown below in Figure 5.
Next, as shown below in Figure 6, stretch the collar until the bottom 2 holes line up with the coorespond-
ing holes on the damper box body and secure the two peices together using 2 screws at these holes.
Finish fastening the damper box and collar together by using screws at each remaining hole.
Figure 5
Figure 6