Installation Pointers
When determining location of the unit, try to place the solar attic fan on the south side of the roof. Also consider potential
problems such as objects shading the unit during certain times of the day. The unit should also be centered on the roof
and the center of the unit should be about 2 feet down from the roof ridge.
Step 1
Choose a location for the solar vent unit. Southern exposure is best. If a southern
exposure is not feasible for your installation, the fan can be installed on any other
exposure to capture maximum sunlight.
Step 2
Hammer a nail at the center of the location chosen between rafters
for the solar attic fan. The center of the unit should be about 2 feet
down from the ridge.
19” HOLE: Attach a string to the nail. Measure 9.5” of string and
attach a marking pen to the string, see diagram. Scribe a 19” circle
onto the roof shingles.
14” HOLE: Attach a string to the nail. Measure 7” of string and
attach a marking pen to the string, see diagram. Scribe a 14” circle
onto the roof shingles.
Step 3
With a reciprocating saw, cut the diameter of the hole.
IMPORTANT:
The solar attic fan must be installed between the roof rafters or over
a roof rafter.
DO NOT CUT THROUGH ANY FRAMING MEMBER.
Step 4
Roof rafters are generally 16” or 24” on center. On 16” on center construction, the
installer can either cut a 14” hole between the rafters or cut a 19” hole with the
roof rafter running through the cut hole -
do not cut the rafter
(see diagram). On
24” on center construction, center the fan between the rafters.
IMPORTANT: NEVER CUT THROUGH ANY ROOF RAFTERS. LEAVE ALL
FRAMING MEMBERS IN PLACE.
Only remove roof sheathing.
Step 5
With a knife, cut a four inch slit through the shingles and tar paper at the three
and nine o’clock positions of the fl ashing. This allows for the foot print of the
fl ashing to be inserted under the shingles.
NOTE:
If a 14” hole was cut instead of a 19” hole in Step 3,
additional shingles may also need to be removed on the high
side towards the ridge to allow the fl ashing to slide over the hole
(see inset Illustration).
