I have often wondered why the dealers do not order these larger units with the 15K AC. Its only a 140.00 MSRP option, a little over 100.00 after average MSRP discounts. If you have to switch one out its much more expensive to do so after the fact. When I ordered mine it was a no brainer, spend the 100 bucks for the bigger AC.
2004 Chevy 2500HD Crew Cab 6.0l, 4.10r
2010 Jayco Jayflight 28BHS
Reese Strait Line with Dual Cam
P3 Brk controller