I understand I'll have to wire it into the power somehow but can you do any better than $500 for one that just has knobs to control it and only uses the vents that are built into it? Any pointers on wiring process? Thanks!
I'm not sure about what you are asking???
Yes, you can easily add an AC roof unit to almost any 14 inch vent hole. The big question is - Will the roof support the weight over that vent?
If you've seen other units similar to yours that have an AC unit over that vent, then the answer is probably yes, the roof will support the weight.
As for 110 volts, this can be easy also.
After you completely remove the existing vent, look in the ceiling cavity, you may luck out and a 110 volt wire may already be tucked away up there and ready to connect.
If not, then the goal is to run the wire so its not ugly across the ceiling. You will want to run #12 wire (3 wires, a Hot, Neutral, and Ground)
1) You might be able to fish the wire in the ceiling to a nearby cabinet, then from there route it to your circuit breaker panel.
2) If you can't fish the wire in the ceiling, I use a product called "Wire Molding" to run the wire in. Most have double sticky tape to hold it to the wall, but I would also use a few small screws to make sure it stays.
Anyway, run the wire molding from the AC unit, to a ceiling cabinet, then from the cabinet, route the wire to your breaker panel.
You can buy a 6 ft piece of wire molding at Lowe's or Home Depot.
I used a short piece to run wires to a ceiling light in my bathroom when I added a wall switch. This may give you some ideas on routing your wires. Look at t how I neatly transitioned the wire from the ceiling, and was able to fish it into the wall.
Adding bathroom light wall switch converts ceiling fixture to LOW-MED-HIGH | 2001 Coachmen Mirada 300QB
IMPORTANT - When you order your AC unit, make sure you get the correct ceiling unit, i.e. it will have the vents built into it (non-ducted)
I assume your looking at a ceiling control unit something like the one I have in my Mirada. Two items:
1) This unit is LOUD - wind noise - Its not like a small window unit at home.
2) If yours is identical to mine, consider making this modification that vastly improves airflow.