JCJ Mud Dauber Screen | RV Furnace Outside Fitting, Fits M500 Series

Mud daubers and other insects love building nests inside the exterior fittings of RV furnaces, and a blocked vent can affect furnace operation or trip a safety shutoff. JCJ's mud dauber screen covers the outside fitting on M500 series furnace and fan units to keep pests out without restricting airflow.

It's made of stainless steel mesh and springs so it holds up outdoors, and it installs with tension springs plus an included installation tool, no permanent modification needed.

• Stainless steel screen and springs, built for outdoor exposure
• Keeps mud daubers, mice, wasps, and other pests from nesting in furnace fittings
• Does not block airflow to or from the furnace
• Fits M500 series RV furnace and fan units
• Installs easily with included tension springs and tool

A cheap bit of insurance for anyone who's dealt with a nested-over furnace vent.