All Vulcan Vents are categorized below by typical application.
- Install Vulcan Vents in numerous construction materials: Wood (FF), Stucco (S) as well as with Mil Core (SMC) and Foam Back (FB), Fiber Cement (FC), and more.
- Cutout size list
- Custom applications and copper are also available upon request
Above: Watch the full length demonstration video.
What vent type do you need?
Continuous vents are made for superior circulation, and allows relatively cool air to enter the attic when used in conjunction with dormers and gables. They can be installed in soffits or eaves, but are most common is soffits.
Quick reference as well as more pics and info for continuous vents here
Dormers (much like gables) offer large areas of ventilation in a vertical orientation and are best when used as high up as possible on the roof. Climate considerations should be taken into account when considering dormers.
Eaves are the overhanging ledges of a roof and are usually diagonal. Many of our eaves use a ‘drop in’ style with wings that can be adjusted to your material and cut out size, and are horizontally oriented. Eaves without suffixes or with RT are for rafter and truss installation, where spacing is commonly imprecise. These have ‘wings’ or tabs to install easily in those variably spaced rafters/trusses.
Foundation vents are vertically oriented and are important for allowing the crawlspace or basement to ventilate out moisture to prevent rot from setting in.
Gables, like dormers, are vertically oriented vents best placed as high as possible. When used in conjunction with lower soffit or eave vents, rapid cooling and venting of the attic can take place.
For when re-installing vents is impractical but you still want to fire proof your attic, you need Vulcan Retrofits.
Soffit vents are the horizontally oriented vents that are placed in the under side of the soffit which typically vent the attic. Continuous vents are soffit vents but not all soffits are continuous, and are rectangular.
Below you can rotate, pan, and zoom an eave model. Some eaves like the one below, do not have flange suffixes.
Left mouse+move=rotate Right mouse+move=pan Middle mouse=zoom in,out
See all vent 3D viewers and downloads
Our model numbers (with some exceptions) all end with one or two letters which specify the flange type and thus the material the vent is meant to be installed in.
What do the “FF” suffixes mean?
“FF” designates ‘Flange Face’ a frame designed where the flange is on the Face. This model is used for wood structures in most cases. These vents can be cut in after the siding is installed.
What do the “S” suffixes mean?
“S” designates stands for stucco siding. With a flange that is about 3/4″ recessed back so that when the vent is installed, the stucco application will be flush with the front of the vent.
What do the “FB” suffixes mean?
“FB” designates ‘Foam Back’, AKA frame designed for Stucco with foam. it has a flange recessed 1 1/2″ back so that when the vent is installed, the stucco-foam application will be flush with the front of the vent.
What do the “FC” suffixes mean?
“FC” stands for ‘Fiber Cement’ which is made for- you guessed it- Fiber Cement. It has a flange recessed 3/8″ back so that when the vent is installed the front of the vent will be flush with the fiber cement board.
What do the “RT” suffixes mean?
“RT” designates ‘Reverse Tab’ a frame designed with reverse tabs for eaves.
What do the “SL” suffixes mean?
“SL” designates ‘SL’, or single leg, a continuous vent frame designed where the flange is on one side only in order to fit into rafters without the gap space for two legs.
General installation instructions
Installation notes and instructions for:
- Foundation and soffit ‘FF’ (flange face) flanges
- Foundation and soffit ‘S’ (stucco) flanges
- Eave (rectangular), Eave (round)
- Dormer retrofit kits, sub-base and sub-flashings
Please note: We’ve compiled these instructions for your general guidance, but real world circumstances may mean these guides will not serve every conceivable environment. Some types of ours (such as continuous vents) have additional instructions or diagrams. Please see their respective sections on this page.
See below for actual hole sizes needed to fit Vulcan Vents. Expect as much as a .25″ tolerance range.
|SKU||Cutout size in inches||Cutout size in cm|
|VDLR419||4 X 19||10.16 x 48.26|
|VDR1224||12 round||30.48 round|
|VDR918||9 round||22.86 round|
|VE3514FB||3.5 X 14||8.89 X 35.56|
|VE3514FC||3.5 X 14||8.89 X 35.56|
|VE3514FF||3.5 X 14||8.89 X 35.56|
|VE3514RT||fits 2 X 4 fire blocking with 16″ on center rafters||fits 5.08 X 10.16 fire blocking with 40.64 on center rafters|
|VE3514S||3.5 X 14||8.89 X 35.56|
|VE3514SMC||3.5 X 14||8.89 X 35.56|
|VE3522FB||3.5 X 22||8.89 X 55.88|
|VE3522FC||3.5 X 22||8.89 X 55.88|
|VE3522FF||3.5 X 22||8.89 X 55.88|
|VE3522FM||3.5 X 22||8.89 X 55.88|
|VE3522RT||3.5 X 22||8.89 X 55.88|
|VE3522S||3.5 X 22||8.89 X 55.88|
|VE3522SMC||3.5 X 22||8.89 X 55.88|
|VE5514FB||5.5 X 14||13.97 X 35.56|
|VE5514FC||5.5 X 14||13.97 X 35.56|
|VE5514FF||5.5 X 14||13.97 X 35.56|
|VE5514FM||5.5 X 14||13.97 X 35.56|
|VE5514RT||fits 2 X 6 fire blocking with 16″ on center rafters||fits 5.08 X 15.24 fire blocking with 40.64 on center rafters|
|VE5514S||5.5 X 14||13.97 X 35.56|
|VE5514SMC||5.5 X 14||13.97 X 35.56|
|VE5522FB||5.5 X 22||13.97 X 55.88|
|VE5522FC||5.5 X 22||13.97 X 55.88|
|VE5522FF||5.5 X 22||13.97 X 55.88|
|VE5522FM||5.5 X 22||13.97 X 55.88|
|VE5522RT||fits 2 X 6 fire blocking with 24″ on center rafters||fits 5.08 X 15.24 fire blocking with 40.64 on center rafters|
|VE5522S||5.5 X 22||13.97 X 55.88|
|VE5522SMC||5.5 X 22||13.97 X 55.88|
|VE7514FB||7.5 X 14||19.05 X 35.56|
|VE7514FC||7.5 X 14||19.05 X 35.56|
|VE7514FF||7.5 X 14||19.05 X 35.56|
|VE7514RT||7.5 X 14||19.05 X 35.56|
|VE7514S||7.5 X 14||19.05 X 35.56|
|VE7514SMC||7.5 X 14||19.05 X 35.56|
|VE7522FB||7.5 X 22||19.05 X 35.56|
|VE7522FC||7.5 X 22||19.05 X 35.56|
|VE7522FF||7.5 X 22||19.05 X 35.56|
|VE7522FM||7.5 X 22||19.05 X 35.56|
|VE7522RT||7.5 X 22||19.05 X 35.56|
|VE7522S||7.5 X 22||19.05 X 35.56|
|VE7522SMC||7.5 X 22||19.05 X 35.56|
|VER2||2″ hole round||5.08cm hole round|
|VER2M||2″ hole round||5.08cm hole round|
|VER3||3″ hole round||7.62cm hole round|
|VER3M||3″ hole round||7.62cm hole round|
|VER4||4″ hole round||10.16cm hole round|
|VER4M||4″ hole round||10.16cm hole round|
|VER6M||6″ hole round||15.24cm hole round|
|VFS414FB||3.5 X 13.5||8.89 X 34.29|
|VFS414FC||3.5 X 13.5||8.89 X 34.29|
|VFS414FF||3.5 X 13.5||8.89 X 34.29|
|VFS414FM||3.5 X 13.5||8.89 X 34.29|
|VFS414R||3.5 X 13.5||8.89 X 34.29|
|VFS414S||3.5 X 13.5||8.89 X 34.29|
|VFS414SMC||3.5 X 13.5||8.89 X 34.29|
|VFS614FB||5.5 X 13.5||13.97 X 34.29|
|VFS614FC||5.5 X 13.5||13.97 X 34.29|
|VFS614FF||5.5 X 13.5||13.97 X 34.29|
|VFS614FM||5.5 X 13.5||13.97 X 34.29|
|VFS614R||5.5 X 13.5||13.97 X 34.29|
|VFS614S||5.5 X 13.5||13.97 X 34.29|
|VFS614SMC||5.5 X 13.5||13.97 X 34.29|
|VFS814FB||7.5 X 13.5||19.05 X 34.29|
|VFS814FC||7.5 X 13.5||19.05 X 34.29|
|VFS814FF||7.5 X 13.5||19.05 X 34.29|
|VFS814FM||7.5 X 13.5||19.05 X 34.29|
|VFS814R||7.5 X 13.5||19.05 X 34.29|
|VFS814S||7.5 X 13.5||19.05 X 34.29|
|VFS814SMC||7.5 X 13.5||19.05 X 34.29|
|VG1224FF||12 X 23.5||30.48 X 59.69|
|VG1412FB||14 X 12||35.56 X 30.48|
|VG1412FC||14 X 12||35.56 X 30.48|
|VG1412FF||14 X 12||35.56 X 30.48|
|VG1412FM||14 X 12||35.56 X 30.48|
|VG1412R||14 X 12||35.56 X 30.48|
|VG1412S||14 X 12||35.56 X 30.48|
|VG1412SMC||14 X 12||35.56 X 30.48|
|VG1418FB||14 X 17.5||35.56 X 44.45|
|VG1418FC||14 X17.5||35.56 X 44.45|
|VG1418FF||14 X17.5||35.56 X 44.45|
|VG1418FM||14 X17.5||35.56 X 44.45|
|VG1418R||14 X 17.5||35.56 X 44.45|
|VG1418S||14 X17.5||35.56 X 44.45|
|VG1418SMC||14 X17.5||35.56 X 44.45|
|VG1424FB||14 X 23.5||35.56 X 58.42|
|VG1424FC||14 X 23.5||35.56 X 58.42|
|VG1424FF||14 X 23.5||35.56 X 58.42|
|VG1424FM||14 X 23.5||35.56 X 58.42|
|VG1424R||14 X 23.5||35.56 X 58.42|
|VG1424S||14 X 23.5||35.56 X 58.42|
|VG1424SMC||14 X 23.5||35.56 X 58.42|
|VG148FB||14 X 7.5||35.56 X 19.75|
|VG148FC||14 X 7.5||35.56 X 19.75|
|VG148FF||14 X 7.5||35.56 X 19.75|
|VG148FM||14 X 7.5||35.56 X 19.75|
|VG148R||14 X 7.5||35.56 X 19.75|
|VG148S||14 X 7.5||35.56 X 19.75|
|VG148SMC||14 X 7.5||35.56 X 19.75|
|VSB1212||13 X 13||33.02 X 33.02|
|VSB8585||10 X 10||25.4 X 25.2|
|VSC2120||2 X cut to length||5.08cm X cut to length|
|VSC2120RF||2” X cut to length||5.08cm X cut to length|
|VSC2120SMC||2” X cut to length||5.08cm X cut to length|
|VSC25120||2.5” X cut to length||6.35cm X cut to length|
|VSC25120SMC||2.5” X cut to length||6.35cm X cut to length|
|VSC3120||3” X cut to length||7.62cm X cut to length|
|VSC3120RF||3” X cut to length||7.62cm X cut to length|
|VSC3120SMC||3” X cut to length||7.62cm X cut to length|
|VSC4120||4” X cut to length||10.16cm X cut to length|
|VSC4120SMC||4” X cut to length||10.16cm X cut to length|
|VSC5120||5” X cut to length||12.7cm X cut to length|
|VSC5120SMC||5” X cut to length||12.7cm X cut to length|
|VSC6120||6” X cut to length||15.24cm X cut to length|
|VSC6120SMC||6” X cut to length||15.24cm X cut to length|
|VSF7519||8 X 20||20.32 X 50.8|