Adding roof vent with fan?

mtnbbud wrote:

Roger10378 wrote:
First you need to find out what electricity is under the wall plate. If it is indeed for air conditioner it is probably 120 Vac. Most power vents run on 12 Vdc so it will be necessary to get 12 Vdc from somewhere. As far as ease of getting the power the rest of the way it is hard to give any advise. All but the cheapest vents have the ability to run either direction. It has been a long time since I have seen one with an aluminum cover so good luck on that one.

Thanks - I didn't consider the wiring being 120 Vac. That makes complete sense and certainly makes putting in a fan tougher. I was hoping it'd be an easy-peasy upgrade. I'm not really in the mood to find and run 12Vdc wiring unless I can keep it in the ceiling out of sight. There is a light fixture nearby, I might be able to use that...

That would be a "prewire" for the at the time optional A/C unit.

Basically the RV manufacturer would have preinstalled the 120V wiring while building the RV in case of the new owner wanting the dealer to install A/C.

Wiring for A/C units are typically done as a "dedicated" run from power panel to A/C with nothing else on that circuit. You might be able to repurpose that wire.

Just need to verify that the wire in that connection box is not hot or connected to a 120V breaker.

That wiring may or may not be installed in your power panel, if no breaker exists for A/C chances are the wiring is just tied up behind the power panel. In this case, you could potentially reuse the existing Romex wire for 12V, just make sure you mark it well for your new use..