Install 3rd A/C

Have you tried pushing the front cool air to the rear with a floor fan? It works great for me but I don't have a black rig either. As spiffy as it looks, they sure don't cool well.

Anything can be done if you throw enough money at it. It is a matter of cutting in another roof opening (fairly simple). However, there needs to be structural support for the AC unit (difficult). Also, you need to run power to the unit (difficult).

Have you checked if the existing AC units are working properly? Are they charged correctly (overcharged is as bad as undercharged)? Get it checked by a good HVAC tech, not an RV dealer unless they are someone you trust to do good work. I have seen many AC systems checked by an RV tech and they just charged with refrigerant rather then looking for the true cause of the loss of refrigerant.

If the units check out properly, then you may want to look into going to higher capacity units to replace your existing units.

Have you looked into the RV portable air conditioner units. These have come a long way and apparently do nice job. I don't know anything about these portable air conditioners. I notice they have one with one port and another style with two ports???





Just something else to ponder on maybe...
Roy Ken

8500W is 70A which will run 3 ACs. Assuming you have 2 35A circuits you need to look at how to balance all of the loads as you'll now have 2 ACs on one circuit. Do you have room for another CB? A new CB won't be part of any EMS unless you change it also. Ceiling and wall wiring for another AC might be a challenge depending upon your rig.

Only you can decide on the "hassle" factor.

I would opt to replace one of the current ac's with a bigger unit if possible , the one closest to the rear bedroom. the hole is already there along with the support and wiring , others have said you would need for 3rd ac.

I have seen some with 3 AC units, so maybe it is set up and wired for it.
Talk to a dealer or RV service place.

There are 2010 Fleetwood "Discovery" 40G that already have a third. Not sure how they are setup and installed on those rigs. Have you talked to a dealer or maint shop to see if you are already wired for a third? or what will be needed to make the addition, if not already ready?

Swap your bedroom AC unit out for a large one ( more BTU's )

IMHO, there must be a problem with your units. Our coach has 3 15,000BTU units but we have RARELY used all three. Two seem to cool the coach well. Before I'd invest the money to add a third unit, I would make sure the two you have are running as efficiently as possible....Dennis

Your rear A/C should freeze you out. If not, there is something wrong with it. Turn it on and check the discharge air with a thermometer. It should be 65 degrees or cooler. If you are already thinking about another A/C, just get it and replace the rear A/C. We have three A/C units, but the only time we run all three is when visiting Las Vegas with temperatures over 110 degrees.