"Racetrack" ducts on the AC

[sully585]

I have some questions regarding the best setting for my AC units on the Cougar 368MBI. I understand that this particular unit has a "racetrack" duct that is basically an endless loop between the front and rear AC units. So for example, if the rear unit is running and the front unit is not, some of that AC from the rear unit is traveling all the way up the racetrack and coming out the front vents? is there any way to close certain vents (like the middle bedroom and the bathroom) to improve airflow through the open vents?

2nd question: how do y'all set your units for best efficiency during the heat of the day? do you open the dumps and let the air blast straight down, or keep the dumps closed? i'm in North Texas and we have basically been living in a blast furnace for about 3 months solid. temps in the high 90's/low 100's every day. the AC basically runs all day long and doesn't start to cycle on/off until around 2 hours after sunset. should i be dumping the air during the heat of the day and closing the dumps when the sun goes down? is it ok for the units to run all day without shutting off?

[ctbruce]

Not sure if there is a right way, but what works for me is situational. If it's not too bad out, I'll just run the vents. If we are where the heat will get hot, then we open the dumps early in the morning to get trailer as cold as possible and keep shades closed to keep heat out. We also use a couple of fans to help circulate the air better. Seems to work well for us.

[Frank G]

It's 7am and the temp in here is 70 by 5pm it will be 80. We have no cover, full sun. Cant wait to move back under the old oak tree. Sinise we have a rear living model we open, about half, the rear dump. Other than that the A/C's run full out all day.

[gearhead]

80 has about been our overnight low temp here lately. Highs in the upper 90's and low 100's. But, our humidity has gone down a bit.
Get the temp down inside in the morning, pull the shades, put the awning out to get some shade on the side of the RV.
Or, go to the mountains for the summer.