Teardrops n Tiny Travel Trailers

I used one 25 CFM 120V AC computer fan under the roof vent to remove hot air. Figuring I have 68.8 cu. ft. inside with storage shelves full, that will replace the cabin volume every 2 minutes 48 seconds. At the left is a 12V DC top light, and at the right a 120V AC 13-watt fluorescent lamp in a Mason jar.