VULCAN VENT 3-1/2 in. x 22 in. Fire-Stopping Tabbed Eave Vent, Galvanized Steel, 41 Sq. In. Net Free Area – VE3522

This Vulcan Vent 3-1/2 in. H x 22 in. W fire-stopping eave vent provides 41 sq. in. of net free vent area in an exterior retrofit galvanized steel frame. A fire and ember stopping matrix sits behind the quarter-inch mesh to block flame intrusion. Sold individually; 10 per case.

Key Features

• Fire & ember stopping: The Vulcan Fire Stop Honeycomb Matrix behind the 1/4 in. mesh swells when exposed to high temperatures and closes off the cells, blocking fire and ember intrusion.
• Intumescent coating: The matrix is 1/4 in. hexagon expanded aluminum coated with an intumescent coating from Firefree Coatings Inc.
• Galvanized steel frame: The vent uses an exterior retrofit style galvanized steel frame built on an industry-standard vent design.
• Easy retrofit install: The same vent frame that has been an industry standard for years makes installation easy with no learning curve.
• 41 sq. in. NFVA: This 3.5 x 22 in. size delivers 41 sq. in. of net free vent area.
• Wildland fire tested: Meets California Building Code SFM 12-7A of the California Wildland-Urban Interface fire code program.

Specifications

Manufacturer model

VE3522

UPC

899646002000

Sell unit

1 eave vent

Material

Galvanized steel frame with 1/4 in. hexagon expanded aluminum matrix

Color / finish

Galvanized steel

Nominal size

3.5 in. x 22 in.

Height

3-1/2 in.

Width

22 in.

Net free vent area

41 sq. in.

Mesh opening

1/4 in. hexagon expanded aluminum matrix

Style

Exterior retrofit, tabbed eave vent

Pack quantity

1 each (10 per case)

Intended use

Eave venting for wildland-urban interface fire protection

Code compliance

Meets California Building Code SFM 12-7A (Wildland-Urban Interface)

Coverage and How Much You Need

One vent provides 41 sq. in. of net free vent area. Size the number of vents from your attic's required net free ventilation divided by 41 sq. in. per vent.

Fit and Compatibility

Part of the Vulcan Vent fire-stopping line, which also includes 3.5 x 14 in., 5.5 x 14 in., 5.5 x 22 in. and other industry-standard eave and foundation vent sizes. Fasteners and flashing are not included.

Frequently Asked Questions

What is included with the vent?

One complete eave vent with the fire-stopping matrix built into the galvanized steel frame; sold per each, with 10 vents per case.

How much air does this vent move?

This 3.5 x 22 in. size provides 41 sq. in. of net free vent area.

How does it stop fire and embers?

The 1/4 in. hexagon expanded aluminum matrix is coated with an intumescent coating that swells at high temperatures and seals the cells against fire and embers.

Is it code approved for wildfire zones?

It meets California Building Code SFM 12-7A of the California Wildland-Urban Interface fire code program; always confirm requirements with your local building department.

Is installation difficult?

It uses the industry-standard vent frame, so it installs like a conventional eave vent with no learning curve.

Product Expert Notes

Choose this 3.5 x 22 in. size when your eave bays or rafter spacing match a 22 in. wide opening and you need wildfire ember protection without sacrificing airflow. Because it is an exterior retrofit style, it suits upgrading existing eaves as well as new construction. Larger 5.5 in. sizes from the same line double the net free area per vent if your ventilation math falls short.

Follow the manufacturer's installation drawing and check local wildfire-zone building codes before installing eave vents.

Protect your eaves with the Vulcan Vent 3-1/2 x 22 in. fire-stopping eave vent today.