If one looks at the current Airstream Catalog, trailers 25' and longer all get one 15,000 BTU AC unit with the standard 30 amp electric service. If one upgrades to the 50 amp service, then a second AC is installed (rated 13,500 BTU) usually where the front fantastic fan is located. On the Classic 27FB model, that is in the front bed room.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels