A) Condensating is supposed to be more efficient. However, the drip/drain is supposed to be caustic. Condensating might be larger in size so good luck sitting in flush within your exterior wall. If hangs on the outside of the house it will be ugly and concealing the pipes is hard.
B)A super freeze will kill it no matter what side of the house you have it. There is some thermal protection in there, but not much. The freeze will happen and when it thaws, the copper can bust. If thawing is not an issue, the electrical components can freeze/break.
C) Being THE electrician of Brazos Valley, do you have a whole house generator? Not stalking, but if you do you would be ok during power outages.
D) Tip. Tell your electrician (hahah) to mount the GFCI plug as high as possible in the area. I have seen numerous idiots put the electrical directly below all the plumbing. It was just a normal 110 volt plug, not GFCI, and not protected from water.
E) WATCH the plumber. As you will need to service/drain/flush, make sure all the off/on valves are facing you, easy to reach, easy to toggle , etc.
F) There is NO feasible repair when they blink out, and you will be told to simply replace. Parts and know-how are super limited.
G) Some of the rich folk get two tankless waters heater. That is usually for upstairs/downstairs or alot of family members.
I might add more comments, but this is the real deal.
