Since the discontinued MaxxAir 4700k model fits a standard 14 x 14 RV vent opening, I recommend the MaxxFan Plus Roof Vent w/ 12V Fan - 10 Speed # MA00-04500K. The MaxxFan Plus comes with a thermostat and a remote for easy temperature customization. Also, with the powered lift feature, you do not have to go through the pain of having to manually lift the vent by hand. It also closes automatically with the rain/snow sensor to keep you dry.
I went ahead and attached a video that walks you... view full answer...
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