I looked at some screens last week at the RV parts place here and decided against them. We have the asian beetle plague here every fall. Those screen openings look to large to keep those out. Any smaller screens out there without making my own? I was thinking about getting wire screen and just making some. Need something kinda thick though for the furnace so it doesn't burn through.
Last year it was the hot water heater......had thousands of them in the burner. The year before it was the furnace. There were so many in there the furnace wouldn't light without help. After I burned them up I blew them out with air from the compressor.