Air Vent B-144 Installation Instructions

INSTALLATION INSTRUCTIONS

1.) POSITIONING THE VENTS ON THE ROOF

Position the vents evenly spaced across the roof, below the ridgeline so that the vents can
only be seen from one side of the house, yet no greater than 2 feet below the ridgeline.

2.) DRILL THE GUIDE HOLE

Adjust placement of the vents to avoid drilling through any rafters. Drill a guide hole near the
center position of each vent.

3.) OUTLINING THE HOLE

Mark correct diameter for the vent you have selected using the chart below.

4.) CUTTING THE HOLE IN THE ROOF

Using a saber saw, cut and remove all the roof shingles (and deck) inside the diameter circle you
have marked. Next, cut back approximately 1-inch of the SHINGLES ONLY out of the top half of
the hole to allow room for placing and positioning the flange.

5.) POSITIONING THE BASE

Make sure the base flange parallels the ridgeline of the roof. Slip the upper half of the flange
under the shingles. Center the unit over the hole. When installing the B-144 make sure the dome
is level with the roof line. For the RVP61, SLP61 AND SQP61 the shingles should stop at the
midpoint of the flange while still covering the nails. For all static roof vents the shingles should lay on top
of the flange all the way down to the lower side of the opening. The flange from this point should
rest on top of the shingles.
attaching the vent to the

6.) SECURING THE BASE

Attach the flange securely to the roof with at least 8 galvanized roofing nails. Nails should be at
least 2 long and should penetrate the vent, shingles and decking. Use a nail in each corner of
"
the flange and along the middle of each side of the vent. Use caulk to seal around each nail. If
flange ribbing is present, vents should be shingled down to side flange ribbing only.
Use the following chart to determine proper size of opening, based on the model of vents you are installing.
Model
B-144
SLP 61
SLA / RVG55
RVAL50 / RVGL50
SQP61/RVP61
RVA51 / RVG51
RVA40 / RVG40
RVHC51 /
RVG53
UH50 / 550
SLP150
Static Roof Vents
If nail holes are provided in the vent they should be used for
roof deck.

Size of Opening

Description
round plastic or metal
slant plastic
slant aluminum / galvanized
slant aluminum / galvanized
square plastic
square aluminum / galvanized
slant aluminum / galvanized
square high collar
aluminum or galvanized
square aluminum / galvanized
slant plastic
Net Roof
Free Area Pitches
3/12 to 8/12
144 sq. inches
61 sq. inches 3/12 to 12/12
50 sq. inches 3/12 to 12/12
50 sq. inches 3/12 to 12/12
3/12 to 8/12
61 sq. inches
3/12 to 8/12
50 sq. inches
40 sq. inches 3/12 to 12/12
3/12 to 8/12
50 sq. inches
3/12 to 8/12
50 sq. inches
150 sq. inches 3/12 to 12/12
Diameter of
Opening
14"
9"
8"
8"
9"
8"
7-½"
8"
8"
13" x 13" square
Part No. 18943