Alpha used in the floor ducted air conditioners. They have two evaporators, two compressors and one fan. SO Basically two units in one package.
If that is what you are looking at, then it will be fine as it has a pair of 13,500 Btu compressors, or the same capacity as two units.
However the Alpha units are very difficult to service. You basically have to drop them to the ground, and work on them under the fifth wheel, or move the fifth wheel and work on them separate from the RV.
Good luck,
Fred.