Originally Posted by oscarvan
Instead of straight down out the hole the cold air is sent into a duct that runs through the ceiling. The rooftop unit is the same.
NO, they are not. There are ducted air handlers (roof top A/C units) and not ducted air handlers. See attached blog. https://rvshare.com/blog/rv-ducted-air-conditioner/
This was one of the features that sold us on the Cedar Creek with the ducted A/C system.
One of the features with this system is you can operate the A/C fan on any speed you like, and it is relatively quiet. When we are watching TV at night, I will run the front A/C fan on low with the rear A/C unit on auto. The TV can be at normal volume level for hearing, as compared to our old Cougar with the non-ducted A/C.
When we go to bed the front unit is shut off and the rear unit fan is run continuously either on low or med speed. This will move air around the unit and is quiet when we sleep plus the front bedroom is comfortable for sleeping. We could not do this on a non-ducted A/C unit.