Originally Posted by TX_Arvee
My question to this group is; are there any upgrade units that perform better under the harsher temps?
We are doing all the things to limit heat sources; tint, window shades, fans, etc. I am just wondering if there is something better out there. I am not opposed to replacing the stock A/C unit.
It looks like you have a 2012 model. As mentioned above, a 15k BTU unit is as big as RV AC's get.
If you were to go to a 2nd unit, it'd mean upgrading to 50A service. It'd also mean having a second thermostat or wiring in a thermostat that could handle two units. Regardless, it's a non-trivial upgrade.
Our Jayco is 2005 and we haven't gone through a summer with it yet nor toured with it in the full TX sun, but I just sold a Class-A (Holiday Rambler) that had 2 13.5k units on it and it would get hot too.
Things I would look at:
1) What is the brand of the unit on your coach? I know the Dometic units pretty well and can provide at least one trick.
2) Make sure your unit is clean. Once a year I pull the cover on the roof and clean both the condenser and evaporator coils with coil cleaner. Dirty coils don't cool well.
3) Make sure it's doing what it should do. Generally this means a 15-20 degree drop in intake to vent temperature. If you're not getting this drop, something is wrong with the AC.
4) When traveling, I shut off the bathroom/bedroom, and I close the vents. This will force the ducted air to the front of the rig where you need it.
5) For more extreme circumstances, I was looking at diverting from the ducts on my Holiday Rambler - a few people on www.irv2.com
did this successfully. Ducted AC is great, but it passes cold air through a partly insulated roof before the air comes out. A non-ducted unit will cool better.