Keep wasps, mud daubers, spiders, and rodents out of your furnace and water heater vents. This stainless steel screen drops into 3-3/4" round exhaust and intake vents and stays put -- blocking pests that can clog burner tubes, damage igniters, and trigger dangerous CO buildup inside your rig. Includes the installation tool so you can seat it properly without improvising.
A single mud dauber nest packed into a furnace exhaust port is enough to cause improper combustion, false lockouts, or -- in a worst case -- carbon monoxide intrusion into the living area. The Camco 42144 addresses this with a fine stainless steel mesh that blocks insects and small debris while still allowing exhaust gases and combustion air to flow freely.
The screen is designed for vents that do not have an access door or built-in pest barrier -- specifically the 2004-series Atwood Hydroflame furnaces and the exhaust vents on Girard tankless water heaters. If your appliance already has a louvered cover with its own screen, verify the opening diameter before ordering.
Corrosion-resistant construction holds up to outdoor exposure, condensation, and the heat cycles typical of RV furnace and water heater vents.
Sized specifically for 3-3/4" diameter round vent openings -- measure your opening before ordering. Camco makes additional sizes for other appliance vents.
The dedicated tool lets you compress and seat the screen into the vent collar cleanly without damaging the mesh or scratching surrounding surfaces.
Backed by Camco's limited 90-day manufacturer warranty against defects in materials and workmanship.
This screen is confirmed to fit the following applications:
If you are unsure whether your furnace vent has a built-in screen, remove the exterior access door and inspect the round metal collar. If the collar is open with no mesh, this screen is the correct fix.
No tools beyond the included installation tool are required. General process: