Lambro 4-In. Galvanized Steel Fresh Air Vent – 11-In. Pipe
$17.99 on Amazon.com (as of October 19, 2026, 1:23 PM EST) View details ↗
The Lambro 34400GNDMS 4-In. Galvanized Steel Fresh Air Intake Vent ensures proper ventilation for indoor gas appliances by drawing in clean outdoor air. Ideal for homes with modern, airtight construction or gas-powered systems like heaters, fireplaces, water heaters, and dryers, this vent helps maintain safe and efficient operation while preventing backdrafts.
Featuring a durable galvanized steel construction, this vent resists corrosion and stands up to harsh weather conditions. The included wire-mesh screen filters out debris, keeping the intake clear while allowing fresh air to flow freely. With an 11-inch pipe length, it’s designed for through-the-wall installations and fits over existing 4-inch openings, making it a seamless solution for both new builds and replacements.
| Pipe Length | 11″ (through-the-wall) |
|---|---|
| Opening Size | 4″ (fits existing openings) |
| Material | Galvanized steel with wire-mesh screen |
| Compatibility | Gas heaters, fireplaces, water heaters, dryers |
| Installation Type | Through-wall (no damper) |





