Hi,
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.