Mushroom_Vent_Fri_Dec_16_2022_17-04-33_Thu_Jan_5_2023_11-28-40
Revised on 8/19/2019
P.O. Box 519
Jacksonville, AR 72078
1-800-643-5596 phone
501-982-1258 fax
PRODUCT SPECIFICATIONS
135 ROOF LOUVER
1.1 MATERIALS:
1.1.1 Aluminum Alloys: Conform to ASTM B209.
Base: 0.032” Aluminum Coiled Sheet.
Rain shield: 0.019” Aluminum Coiled Sheet.
Dome: 0.032” Aluminum Coiled Sheet.
1.1.2 Galvanized Steel:
Bracket: 0.061” Galvanized Coiled Sheet.
Screen: 8 x 8 galvanized grill cloth
1.1.3 Paint: Factory applied baked on Valspar Super Flex.
1.2 MISCELLANEOUS:
1.2.1 Description: Pan-style, self-flashing roof mounted attic exhaust vent. Features a one piece
drawn dome, one piece continuous rain shield, and one piece drawn base. Brackets are
riveted to the rain shield and base, and the dome is attached to brackets with screws.
Screen is securely riveted in place and covers the entire vent opening. This is an exhaust
vent and must be used in conjunction with adequate intake vents for proper operation.
1.2.2 Color: Available in BROWN, WHITE, BLACK, WEATHERED BRONZE, and MILL finish.
1.2.3 Net Free Area: 144 square inches per unit.
1.2.4 Dimensions: Overall – 20” x 23” x 7-3/4”, Opening Size – 14”
1.2.5 Packaging: Packaged 2 to a carton. UPC labels are affixed to each vent and carton.
1.2.6 Performance: Passed Miami-Dade County test requirements for structural uplift and wind
driven rain infiltration.
1.2.7 Approvals: Miami-Dade County Approved – NOA No.: 16-0510.25, expires: 08/17/2021.
Texas Department of Insurance “Windstorm” Approved – Product Evaluation Report No.:
RV-22.
1.800.643.5596 • Lomanco, Inc. • lomanco.comFind us onFacebook Subscribe onYouTube
135 Roof Vent
Installation Instructions
22040_0818
A. Use this unit only in the manner intended by the
manufacturer. If you have any questions, contact the
manufacturer.
B. Installation work must be done by qualified person(s) in
accordance with all applicable codes and standards.
C. When cutting or drilling into wall or ceiling, do not
damage electrical wiring or other hidden utilities.
CAUTION - For general ventilating use only. Do not use
to exhaust hazardous or explosive materials and vapors.
Sharp edges are exposed during installation. Use gloves
and other safety equipment to avoid accidents.
IMPORTANT
With the 135 vent installed, appropriate inlet area must
be provided. This is achieved by installing intake vents,
totaling 144 square inches per vent.
INSTALLATION
1. Determine approximately where on your
roof you will place your 135 roof louver.
• At the highest point in your attic or air
space. Best if centered on roof length, and
less conspicuous if placed on side away
from street. • Keep the top of the ventilator lower than the
ridge line. (The center of the vent should be
about 24 inches down from the peak.)• Establish your position with accuracy
(because you will want to duplicate it inside
your attic) by measuring down from the
ridge and over from the roof edge.
2. Working now from the inside, mark your planned
opening (as you established position when on roof)
and relocate your position to be centered between
two rafters. Drive a nail into the roof so that it
can be easily found when you return to the roof.
Before you return to the roof, be sure that you have:
(a) string or compass, (b) drill and drill bit, (c) keyhole
or electric jig (saber) saw with a sharp coarse blade, (d)
ventilator and base, (e) roofing nails and hammer, and (f)
roofing cement and applicator.
3. Using the nail driven from the inside as center, scribe a 14”
diameter circle using string or compass. Care should be
taken not to make the hole too large.
4. Drill starting holes for sawing inside the scribed circle. A
hand drill with 1/2” bits should do the job nicely.
5. Starting in one of the drill holes, cut circular opening,
faithfully following scribed line. Use either keyhole or an
electric jig (saber) saw with a sharp coarse blade to cut
shingles and roof boards at one time. If you do not have
a coarse blade, cut away shingles inside the circle with
utility knife before cutting roof boards.
6. Carefully remove roofing nails from top row of shingles so
that the flashing of the ventilator will slide under top row.
7. Slide ventilator carefully into place with arrow pointing
up. Fasten the aluminum base to roof boards with roofing
nails. Keep heads of nails under shingles wherever
possible.
8. Finish the exterior mounting by sealing all seams and nails
with roofing cement. Use cement also to fasten down
loose edges of shingles.
NOTE: If the dome is removed for any reason, torque the
mounting screw to a maximum of 60 inch-pounds (+/- 5)
when reinstalled. CAUTION - DO NOT OVERTIGHTEN.THREEMUST DO Steps
to attic ventilation
Install all Exhaust Ventilation at the SAME HEIGHT within a common attic area.
Installation of exhaust vents at more than one level on a roof
allows the upper exhaust vent to pull air in from lower exhaust
vents rather than from the intake vents. Intake air must come from
intake vents located near the lower part of the attic space to
properly ventilate the total attic area and eliminate weather
infiltration. Install ONLY ONE TYPE of Exhaust Ventilation within a common attic area.
Exhaust Vents pull air from the easiest intake source. Vent types cannot be mixed. The use of different types of exhaust vents could make one of the vents act as intake for the other. Intake air must come from intake vents located near the lower part of the attic space to properly ventilate the total attic area and eliminate weather infiltration.
Install a BALANCED SYSTEM of Intake and Exhaust Ventilation.
50% Intake Ventilation - Intake vents located near the lower part of the attic area are required to balance out your ventilation system. 50% Exhaust Ventilation - Use a Lomanco Ventilation Selector Guide, the calculators at lomanco.com, or the Lomanco Vent Selector App to determine the number of vents needed to properly ventilate an attic to meet the minimum code ventilation standard.
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