GAF Master Flow ERV5QCT Instructions page 2

Note: See Figures on previous page.
1. Ensure proper intake ventilation. Always ensure
there is proper attic intake ventilation at or near
the soffit area of the roof. This is required for a
balanced ventilation system and to help avoid
premature ventilator motor failure. Use the chart
located on the outside of the package or visit
gaf.com/ventcalculator to ensure the minimum
recommended intake ventilation is installed on
the home. Always consult local building codes for
ventilation requirements.
2. Locate Position. Locate the ventilator as high
as possible on the roof, but not on the ridge line.
The top opening of the hood must be 24" (609
mm) BELOW the ridge line (Figure 1a). Single
ventilators should be centered; multiple ventilators
should be evenly spaced over the length of the
roof. Measure from the ridge line to the top center
of the ventilator hood (Figure 1b). Using this
measurement, go inside the attic and mark the
location centered between two rafters and drill a
hole. Put an object such as a pencil through the
hole so that it is visible on the outside (Figure 1c).
3. Mark and Cut Opening. Place and center the
template (printed on the outside of the package)
over the previously marked hole. Using a pencil
or marker, use the 15" (381 mm) diameter
template as a guide to mark a circle. For 24"
(609 mm) on-center rafters, make the cutout
shown in (Figure 2a). For 16" (406 mm) on-center
rafters, make the cutout shown in (Figure 2b).
Using a power saber, jig saw, or hand saw, cut
out the opening (Figure 2c).
4. Prepare the Opening. Roll back and separate any
shingles (if existing). Remove all nails within 5 ½"
(140 mm) from the sides and top of the opening.
Note: For additional weather protection, install a
18" x 18" (457 x 457 mm) piece of GAF Leak Barrier
around the opening. Remove release film and center
the Leak Barrier over hole. Press into place and cut
out the Leak Barrier covering the opening.
5. Test Ventilator Position. Test the final position of
the ventilator by sliding the flashing up under the
upper shingles. Trim any shingles as needed and
remove the ventilator (Figure 3a).
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6. Seal and Fasten Ventilator. With the position
tested, apply a bead of roofing cement or
urethane sealant to the underside of the
ventilator's flashing. Proceed with sliding the
ventilator up under the top shingles, with arrow on
the flashing pointing up. Leave the lower portion
of the ventilator flashing on top of the shingles for
maximum weather resistance. Using roofing nails,
fasten the ventilator at all corners of the flashing
and approximately every 4" (102 mm) along the
edge of the flashing (Figure 3b).
Note: For maximum wind resistance remove the
ventilator hood and fasten the flashing every 45
degrees, approximately 1" (25.4 mm) away from the
stack wall. Replace ventilator hood when complete.
Seal all exposed fasteners, flashing, stack seams,
and loose shingles.
Warning: Using excess asphalt roof cement may
cause blistering in the roofing shingles.
7. Wiring. Always disconnect power supply before
wiring the ventilator into an existing circuit.
Remove the cover on the QuickConnect
Controller and mount the metal enclosure on a
rafter or stud utilizing the pre-punched holes in the
orientation as shown in (Figure 4). Ensure that the
TOP on the QuickConnect Controller label points
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towards the roof. Each ventilator must have its
own QuickConnect Controller. Leave the flexible
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conduit with some slack and begin wiring the
QuickConnect Controller as shown in (Figure 4).
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Note: The included QuickConnect
Controller
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arrives with factory default settings of temperature
at 105°F and humidity at 70%. These default
settings can be adjusted once the unit has been
wired and you have downloaded the app and
accepted the end user agreement.
Note: In the unlikely event accessories or parts
are missing or this product does not operate
correctly, please contact Master Flow
Technical Services at 1-800-211-9612 or
email WarrantyLLBP@gaf.com. Do NOT return
this ventilator to retailers or distributors.
INSTRUCTIONS
Model: ERV5QCT
Figure 4
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Warning: Do NOT install QuickConnect
controller with openings facing down
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