Just a heads up that while driving in torrential rain they can bring water into the cabin and get the curtains wet. I stopped placing them there and now put them in the proximity of the galley with a larger vent cover over a 1" hole fitted with round aluminum vents available at Home Depot and other hardware stores. You'll need to place additional similar sized vents through the galley bulkhead to the cabin to help prevent affixation if someone has forgotten to vent the cabin. Try no to place them where clothing or other items will block them. Campinn uses garden hose screens to keep bugs out of the vent holes. Danny
"Conditions are never just right. People who delay action until all factors are favorable do nothing". William Feather Don't accept "It's Good Enough" build to the best of your abilities. Teardroppers Of Oregon & Washington