AC replacement-options, options...
I have recently acquired a 21' 73 Globetrotter. The rooftop AC looks to be the original unit, built by Armstrong. I was optimistic that it might be repairable, but I can't get so much as a hum or buzz from it, even wiring directly to the fan and compressor. I figure with all of the other usual issues (rotting floors, leaking windows, non-working appliances), I'll just go ahead and replace the AC with a modern unit.
From reading other posts, it looks like the Penguin Duotherm is one of the only units with a drain pan compatible with my current internally plumbed condensate drainage. True?
I was originally leaning very much toward a low current draw unit (like the Coleman mach III), as I wanted the option in the future of running the unit off of a small generator. I haven't found a unit that is both low profile and low current draw. I am sure the low profile will look more aesthetic. Any recommendations?
Finally, I currently live in Houston, and most of my near-term travel will probably happen in the southern states. I figured a 13.5 BTU AC would be more than adequate for a trailer this small, plus with a larger unit, I give up the option of low current model. Any thoughts on sizing?