I'm about to sign w/contractor, however, I just had one other question I wanted answered. If you recal from my other posts, I narrowed the selection process down to 2-contractors. Both are equally reputable, however, one wants to install 3-ton system and the other wants to install 3.5-ton. I currently have a 3.5 ton system installed in my 1820 sq.ft. under air home. The contractor that wants to install the 3-ton system was the only one that actually performed a manual J calculation, the other contractor suggested the 3.5-ton system as it has served us well. Some suggest going with the guy that performed the manual J. They suggest my current 3.5 system might be oversized to begin with. From what I understand after reading some comments on this site, is that an oversized system will short cycle and increase the humidity in the home. My current system does not seem to short cycle. If anything it runs for long periods of time during the hottest part of the day. Would this mean that it is not necessarily oversized?
I guess I'm just a little apprehensive with going with the 3-ton system and want to be sure it is the right system for my home. According to the contractor that recommends the 3-ton system, he believes it is the correct tonage for my home. I guess I should believe him, after all, he's the expert. Thanks for your advice!