Air Vent Inc. FilterVent Installation Instructions

							Application procedures and conditions are beyond the control of the manufacturer
and/or seller of FilterVent and for this reason neither manufacturer nor seller can be
responsible for the failure of the product when not used according to instructions
and specifications.
Air VentÕs written warranty for this product shall not apply in any instance in which
the product was not installed in accordance with the instructions contained herein.
FilterVent
¨is a patented product of Air Vent Inc.
Form 14015-8/03 © 2003 Air Vent, Inc.
3000 West Commerce, Dallas, TX 75212
309-692-6969  FAX: 1-800-635-7006
www.airvent.com
DO NOT
EXTEND SLOT
OVER 
OVERHANG
OF 
ROOF.
New Construction
FILTERVENT INSTALLATION INSTRUCTIONS ¨
Existing Roofs
6ý 
6ý 2ý TOTAL
SLOT WIDTH 
RIDGE SLOT
END WALLSIDE WALL
1.Remove cap shingles along
entire length of ridge.2.Snap chalk line along
centerline of peak.3.Snap parallel lines on both sides
of peak for ridge pole or truss 
construction. (See drawings inside.)4.Mark end of slot 6ý from
inside of end wall on each end.
5. Cut through shingles to roof
sheathing with utility knife.6.Strip away cut-out scrap
from slot.7.Cut through roof sheathing with
power saw. Set depth at sheathing
thickness (approx. 3/4ý).8.Remove cut out portions of
sheathing. Once slot is cut out,
follow Steps 3 through 9 for
New Construction. 5.Inset end plugs.6.Join FilterVent sections
with connector plugs.7.Extend FilterVent past
ends of slot to full length of
ridge. Cut final section.8.Align joined FilterVent
over slot, fasten in place.9.Place straps over
joints and fasten in
place.
1.Cut ridge slot for ridge
pole or truss construction as
shown inside.2.Shingle roof up to slot.3.Let top course of 
shingles lay over unslotted
portion of ridge (ends) to
form one thickness.4.Place FilterVent over
open slot. 
						

							FILTERVENT INSTALLATION INSTRUCTIONS¨
111/4ý long aluminum screw shank 
nails are supplied. For ease of installation
and to prevent vent damage, #8 x 1
1/4ý long
galvanized sheet metal screws may be used.
2For installation on asphalt shingles,
slate, machine split shingles or other smooth 
surfaces, caulking is not required between
the vent and roof surface.
3Before applying vent to dimensional or
architectural shingles on new construction, 
leave felt long at ridge and fold back under
vent (see drawings on other side), or caulk 
between low areas of shingle and flange 
of vent.
4When installing on flat tile, handsplit
shakes, or standing seam roofs, use 
Tile FilterVent. Please call for assistance
when using on barrel tile or high seam 
roofing.
5Use FilterVent products for roof slopes
from 3/12 to 12/12.
6When installing these vents the 
slot must be cut in accordance with the 
illustrations shown within.
7When retrofitting, and on new 
installations where a ridge beam exists 
and the roof slope exceeds 9/12, a plumb
cut must be used to keep the slot as 
narrow as possible.
8FilterVent works at maximum 
efficiency when used with an equal amount
of soffit venting. This can be accomplished
with Continuous Soffit Vent or 16ý x 8ý 
undereave louvers.
9Make all existing roof and/or 
gable end vents inoperable by plugging or
blocking to prevent short-circuiting of the
ventilation system.
10When installing straps at joints and
ends, care must be taken not to distort or
crush the ridge vent.
11Install connector straps at each end 
of the vent run.
12For best appearance, run FilterVent 
to ends of roof.
Helpful Installation hints.
Please read complete instructions before you begin! 
						

							On all installations, cut ridge slot for ridge pole or truss 
construction as shown below and in the architectural drawings
below. Slot must not be cut within 6ý of end wall.
DO NOT EXTEND SLOT OVER OVERHANG OF ROOF.
FilterVenton asphalt shinges, 12/12 pitch Roof. FilterVent 
recommended for 3/12 to 12/12 pitch roofs.FilterVenton cedar shakes, 12/12 pitch roof. Roofing 
underlayment wraps around top course of shakes.
Ridge Pole ConstructionAlternate 1 Ð for low pitch roofs.
Typical FilterVent installations:
NOTE: The illustrations at right depict the proper
methods of installing ridge vents for various types
of construction.
FilterVent has 18 sq. in. net free vent area. It is
not necessary to cut the slot extra wide.
Maximum protection is attained when the vent is
supported to the throat by the roof and shingles.
6ý 
6ý 
2ý TOTAL  SLOT WIDTH 
RIDGE SLOT
END WALL
SIDE WALL
New Construction
FILTERVENT INSTALLATION INSTRUCTIONS ¨
Hip Roofs
Cut slot 11/2ý on either side of ridge 
centerline and to within 6ý of end.
53/4ý
3ý  TOTAL SLOT WIDTH6ý
SHEATHING
TRUSS OR RAFTER
SHINGLES
FILTERVENT
53/8ý
6 TO 1212
FILTERVENTSTARTER STRIP
WOOD SHAKES
SHEATHING
TRUSSES
15# ROOFING FELT COURSE  
WITH SHAKES 7 WRAP TOP 
UNDER RIDGE VENT
53/8ý
11/4ý
126TO12
11/4ý
SCALE: 3/16ý = 1ýSCALE: 3/16ý = 1ýSCALE: 3/16ý = 1ýSCALE: 3/16ý = 1ý
FILTERVENT
SHEATHING
AIR SPACE
RAFTERS WITH 
RIDGE POLE
SHINGLES Ð 
2 LAYERS WITH 
RETROFIT/REROOF
11/4ý
11/4ý
13/4ý
11/4ý
3 TO 6
13/4ý
12
3/4ý3/4ý
4ý MINIMUMSTARTER STRIP
INSTRUCTIONS FOR CUTTING SLOTS 
						

							FILTERVENT INSTALLATION INSTRUCTIONS ¨
Tile FilterVenton pre-engineered standing seam metal roof.
Separate adapter covers end of roof panels.
Ridge Pole ConstructionAlternate 2 Ð for steep pitch roofs
Tile FilterVentinstalled on either barrel roof tile or flat roof
tile. Please call Air Vent for assistance when using on barrel tile
or high seam roofing.
Truss Construction
CEMENT
HERE BOTH
SIDES
HEX SLOTTED
WASHER HEAD
SCREW
TILE FILTERVENTRIDGE VENT  ADAPTOR
(2 REQUIRED)
NAILING BLOCK 
BETWEEN STANDING 
SEAMS (1ý X 3ý)
STANDING SEAM ROOF
ROOF 
SHEATH
RAFTER6ý TO 12ý
53/8ý
11/2ý
11/4ý11/4ý
12ý
15# 
FELT
ÒLÓ and ÒTÓ Shaped  Roofs
Cut slot and run FilterVent across long ridge. On short ridge,
cut slot to within 12ý of junction point and run FilterVent from
end of roof to butt against crossing FilterVent.
indicates slot width indicates vent run
Chimneys
Cut slots to within 12ý of chimney. Run FilterVent
from end of roof to butt against chimney.
CONDITION WITH
TRUSSES DOTTED51/4ý
1ý1ý
31/2ý2ý
12
9
FILTERVENT11/4ý  WOOD SCREWS 
W/PLASTIC OR 
RUBBER WASHERS
2ý  WOOD SCREWS AT 
EACH RAFTER/TRUSS
3/8ý X 3ý CEDAR BOARD
SEALANT BEAD
ROOFING/SHEATHING
MINIMUM AIR SPACE 2ý
RAFTERS/TRUSSES  
CUT OUT IN EXISTING 
CONSTRUCTION. OMIT IN NEW  
WITH 2ý RIDGE BEAMWITH TRUSSES
12ý
12ý12ý
RUN FILTERVENT TO
END OF RIDGE
RUN FILTERVENT  
TO END OF RIDGE
BARREL ROOF TILE
53/4ý
13/4ý
11/2ý
11/2ý
3 TO 612
3/4ý3/4ý
FILTERVENTSHINGLES Ð 
1 LAYER WITH  
NEW CONSTRUCTION,
2 LAYERS WITH RE-ROOF
SHEATHING
AIR SPACE
TRUSSES
SEALANT ROOF        
TILE
53/8ý
11/2ý
11/2ý11/2ý
3/4ý3/4ý
FLAT ROOF TILE
TILE
NAILER
AIR SPACE  
RAFTER
RIDGE POLESHEATHING
TRUSS 
NAILER 
126 TO 12
TILE FILTERVENTÐ3-PIECE FLANGE 
COVERS END OF TILE 
HEX SLOTTED    
WASHER HEAD  
SCREW