Lomanco CV3B Mill Circle Vent 3 in Aluminum 6 Pack

Product Description

The LOMANCO CV3B is a 3-inch mill-finish aluminum circle vent designed to provide passive ventilation for wall cavities in residential and light commercial construction. Heavy-duty aluminum construction resists corrosion and holds up to outdoor exposure without rusting or warping. The vent installs by drilling a hole and pressing the unit in place, making it a straightforward fit for framing and siding applications. Each pack contains 6 vents. Allowing moisture-laden air to escape wall cavities, the CV3B helps prevent the paint peeling and wood rot that result from trapped condensation. Installers working on siding, sheathing, or crawlspace wall systems will find this vent a practical addition to any moisture-management detail.

The CV3B is suited for residential new construction and retrofit projects where wall cavity ventilation is required. Typical applications include wood-framed exterior walls, crawlspace foundation walls, and areas prone to moisture buildup behind siding. The drill-and-pop-in installation method keeps labor time low, making it practical for production framing crews, siding contractors, and general contractors managing moisture control on multiple units at once.

Key Features

• Heavy-duty aluminum construction resists corrosion and weathering
• 3-inch diameter fits standard drilled openings in siding and sheathing
• Drill pop-in installation requires no fasteners or adhesives
• Removes moisture from wall cavities to help prevent paint peeling and wood rot
• Mill finish blends with unpainted or primed surfaces
• Sold in a pack of 6 for efficient multi-opening installations

Compatibility

Designed as an OEM-style passive circle vent for use in exterior wall cavities, siding installations, and foundation wall applications requiring a 3-inch drilled opening.

Installation Notes

Installation is performed by siding contractors, framers, or general contractors and requires a drill and appropriate hole-saw bit sized to the 3-inch vent diameter. Drill the opening cleanly through the siding or sheathing material, then press the CV3B firmly into place until seated. Follow applicable building codes for wall cavity ventilation spacing and placement. No power shutoff is required for this non-electrical component.

Technical Specifications

• Diameter: 3 inches
• Material: Aluminum
• Finish: Mill
• Installation Method: Drill pop-in
• Pack Quantity: 6 vents
• Weight: 4 pounds (per pack)

Standard Information

• Brand: LOMANCO
• Manufacturer Part Number: CV3B