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Mike & Nancy · 11-03-2011, 04:12 PM

Trying to figure out a/c ducting for our 09 Dynasty. It has three roof a/c's and some of the vents have low airflow. If anyone has diagram of ducting or knows the routing let me know......thanks

Drifter · 11-03-2011, 04:29 PM

Most of the Monaco's have two main ducts front to back, You should call Monaco and ask if all three A/C units are supposed to be open to the curb and road sides. On our coach we found out that the front unit was taped off on the curb side and once we removed the tape the flow was much better.

Barlow46 · 11-03-2011, 04:32 PM

Low airflow with all three a/c units going or just running one or two units runnning?
I have the same setup and find that I have more airflow in the cab if I run the front unit and the middle unit than if I run the rear unit. If I run all three units in 90-94 degree weather, it will drop the inside temp. to 72 in a very short time.

Mike & Nancy · 11-03-2011, 04:40 PM

Barlow......All three units running. In Bedroom and toilet room (curb side) vents low flow.

Barlow46 · 11-03-2011, 06:01 PM

Try turning on just your rear bedroom (zone 1) fan only. Put a sheet of paper up against your return air (filter) and see how much suction you have. Also, get a feel for how much air is coming out of the air duct (stand where it can hit you in the face). Then turn off zone 1 and activate zone 2 and see how it feels on your face (fan only). Make sure the fan is set to "high" in both cases. I'm sure you have already pulled your filter and checked it. You can also make sure the back unit is off, pull the filter and feel up inside the return to make sure somebody didn't let a filter get sucked up or disintegrated and is causing a blockage. If all that stuff checks out then you probably need to start looking for a vent supply line that is loose or not connected properly as noted by Drifter.