We had a larger A/C unit installed when our 2552 was built. Opted for the Coleman Mach8 which has a low profile and increased capacity (15,000 btu vs. 13,500 btu). We also opted for the standard A/C, not the heat pump version. Although we do have 50 amp service on our rig the unit will run off the standard PC generator. If you intend on researching this unit Coleman has them built by Airxcel, so a search on both may help.
- Mike