Just wanted to show everyone the screening I added to the outside of my 233S to help keep the wasps/bees from building a nest in our RV. The screen for the hot water heater was purchased at a local hardware store, the screens for the gas heater exhaust vent and the refrigerator are Camco products. I had to use a dremel on the refrigerator screening to cut an area out for the condensation drain, and I also had to add some extra tie wraps to the screening as Camco only gives you six. I did this because last summer my brother had a wasp nest in his RV hot water heater area, not a pleasant surprise.