Keep unwanted visitors away with the Camco Flying Insect Screen 42147. Wasps, mud dauber nests, birds and rodents pose a serious threat to your RV water heater, furnace and stove. These pervasive pests can enter through vents and openings and cause serious damage by building nests that interfere with air flowage. This special RV accessory keep bugs, birds and other pests out of your vehicle's vents without inhibiting air flow. Camco insect screens are made for louver-type RV stove vents, ensuring that water heaters, furnaces and stoves are not impacted. They are easy to install, for effortless use.