I have a 34RL and this to has two A/C units installed. What I like about this system is at night we can shut off the front A/C and just use the rear unit to keep the camper cool. I run the A/C fan on low during the night to move the air around the camper.
You can control the sound level of the A/C units by turning off the rear unit in the evening and using the front unit when watching TV at night. This way both units can be used to cool the RV together or alone as needed.
We did this at the FROG Rally in Goshen this year since we could only use one A/C, just 30 AMPS were available to use.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67