Good day to you, Jason. I can definitely point you in the right direction for AC unit for your 2005 Casita 16' Camper. Since you are replacing a basic roof vent, you will need to install a complete AC system. So, to answer your question, yes, the Advent AC Units will definitely work for this purpose.
You will need to get a complete AC system, meaning a rooftop unit, start capacitor, controller and distribution box. For that I recommend the following:
- Advent Air RV Air Conditioner System... view full answer...