Why does 1 of my 3 vents look different from inside?

[bennyg]

I have a 73 safari and one of my three vents have a plastic mold and 2 rails riveted across. just curious why? also I plan on putting in a fantastic and would appreciate if someone had any recommendations as to which one of the three i should put the new vent in.
Thanks, Ben

[HowieE]

On mine the rails support the factory fan. I would pull that one apart and see if there is 12 volts tucked in there somewhere

[Splitrock]

My trailer had power vents at the front and bedroom locations. The middle vent had no fan. I removed them all and replaced all three with FanTastic fans.

[sepezlover]

Ah ha! That explains why the middle Fantastic Fan in my Sovereign keeps blowing a fuse every time I move the trailer. Whoever put in the wire screwed up.

[Chuck]

yes, I still have the fan in mine. works good...kinda loud, though. one day, I'll replace it w/ a Fantastic.
you should be able to find a wire for a light fixture, as well as a fan.