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MASTER FLOW
Installation Instructions
Safety Considerations and Warnings
1. In situations where no other intake ventilation exists,
this vent must not be installed.
2. In situations where adequate intake ventilation exists at
the eaves/soffit areas, this vent must only be used as an
intake enhancement. It is not intended to replace the exist-
ing intake ventilation at the eaves/soffit areas or take the
place of installing adequate intake ventilation at the
eaves/soffit area.
3. House must have adequate exhaust ventilation for optimal
unit performance.
4. Use appropriate safety glasses, gloves, hard hats,
restraints, and other equipment to avoid injury.
5. Wear durable work gloves while handling the unit
during installation. This product has sharp edges that can
cause injury.
Figure 1a
Figure 1b
EXTERIOR
2'
WALL
EAVE EDGE
Figure 3a
Figure 3b
1. Determine Location
Place intake booster vent 2' (.60m) in from the exterior wall
of the house (Figure 1a) and at least 2' (.60m) in from the
rake edge of the roof (Figure 1b), preferably on the rear
side of the house. Make sure the location is not shaded by
trees or other nearby structures during the day (Figure 1c).
After finding the location for the unit installation, drill a hole
and put an object, such as a pencil or nail, through the hole
to mark it on inside of the attic. Inside the attic, locate this
marker and find the nearest attic rafters on both sides of
the marker.
Measure the distance between the two rafters and locate
the mid-point. Drill a hole at this mid-point and insert an
object, such as a pencil or nail that can be found on the
outside (Figure 1d). This will serve as the final centering
point for cutting the hole on the roof.
Note: Single units should be centered. If multiple units are
used, space evenly over the entire length of the lower
section of the roof
2. Mark Opening
Cut out the 15" (38.1cm) template located on the French
language panel of the Master Flow
®
Intake Booster carton.
Place center of template over the hole marked in the roof,
in step one. Use the correctly positioned template to mark
a circle. For rafters 24"(61cm) on center, mark the cut-out
as shown in (Figure 2a). For rafters 16" (40.6cm) on center,
proceed with marking as shown (Figure 2b).
3. Cut Out Opening And Test Position
Roll back and separate all shingles 7" (17.8cm) from the
top and sides of the cut–out area. Be sure that all roofing
nails have been removed. Using a saber saw, jig saw or
hand saw, cut and remove all roof shingles and deck inside
the 15" (38.1cm) diameter circle (Figure 3a).
©2005 GAF Materials Corporation 12/05
Intake Booster
®
6. Observe all applicable building codes in your area.
7. Do not damage electrical wiring or other hidden utilities
when cutting or drilling.
8. Before servicing the unit, disconnect power leads from
solar panel to prevent accidental operation.
9. Make sure blade is on tight and ensure the set screw is
securely tightened.
10. Use this unit only in the manner intended by GAF. If
you have any questions, please contact Master Flow
Technical Services at 1-800-211-9612.
CAUTION: FOR GENERAL VENTILATING USE ONLY.
THIS FAN HAS AN UNGUARDED IMPELLER.
DO NOT USE IN LOCATIONS READILY ACCESSIBLE
TO PEOPLE OR ANIMALS. DO NOT USE TO EXHAUST
HAZARDOUS OR EXPLOSIVE MATERIALS OR VAPORS.
Figure 1c
SOUTH
2'
Figure 4
Do not cut any rafters. Test the final position by inserting
the top half of the unit flashing under the rolled shingles
(Figure 3b). Trim shingles as necessary.
4. Secure And Seal Unit
Remove the unit from the test position and apply roof
cement to the bottom side of the flashing. Align the unit
and slide it under the shingle corners. Be sure that the
arrow marked in the flashing points up to the roof peak.
Secure the unit into place with galvanized roofing nails at
all four corners and approximately every 4" (10.2cm) along
the sides of the flashing (Figure 4). Finish by using roof
cement to seal all flashing and shingle edges, as well as
nail heads and stack vertical seam. Press all raised shingle
edges back into position.
Warning: Using excess roof cement may cause blistering in
the roofing shingles.
7. Adjust Solar Panel
When adjusting the solar panel, be sure to tilt or rotate the
panel to maximize direct exposure to the sun. To tilt the
solar panel, loosen the two screw/nuts (Figure 5a) on the
rail mount/linkage connection. Then raise the panel to the
desired location and re-tighten (Figure 5b).
To rotate the solar panel (for hood mount installations only) ,
loosen four wingnuts, rotate panel to desired position and
tighten securely.
Note: The optimum angle can be calculated by using the
approximate latitude of the house plus 20 degrees. The
solar panel should always face south.
CAUTION: THIS FAN AUTOMATICALLY STARTS WHENEVER
A LIGHT SOURCE SHINES ON THE SOLAR PANEL. ALWAYS
EXERCISE CAUTION WHEN IN THE VICINITY OF THE FAN.
Notice: If parts and/or accessories are missing, or this
product does not operate correctly, contact Master Flow
Technical Services.
Vent
™
Important:
from the one shown in the illustrations. The perform-
ance of all configurations is the same.
Tools Required
• Drill • 1/8" (.3cm) Drill Bit • Extension Cord • Utility Knife
• Power Saber or Jig Saw and/or Hand Saw • Safety
Eyewear • Galvanized Roofing Nails • Caulking Gun
• Gloves • Ladder • Claw Hammer • Screwdriver
• Pencil or Marker • Silicone • Pliers • Roofing Cement
®
Figure 1d
Figure 2a
Figure 5a
Figure 5b
®
Your solar panel configuration may differ
Figure 2b
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