I've gotten a couple of estimates for three mini split A/Cs. The
outdoor units will be on the roof of a four story building and my
apartment is on the third floor. The building is about half a mile
from the sea in two directions. One vendor is offering three Carrier
units (19,000, 19,000 & 36,000 BTUs) while the other is offering three
Trane units (12,000, 14,000 & 36,000 BTUs). (I don't know why the
vendors disagree on the BTUs required.) The Carrier equipment has a
much better warranty -- 10/5 versus 5/1 -- but I'm told it does not
cover corrosion. Both vendors say the units are protected against
corrosion. The Carrier vendor says he will change the outdoor units
from a small, suitcase-like design to a piston design. I plan to
purchase a service contract.
Any thoughts on what's the better choice? Is corrosion on these units
a problem that can be addressed through proper maintenance? Will
changing the outdoor unit type affect the equipment's performance?
Any help appreciated. Cheers, RV.