I have a situation (long story) where the system that needs to be installed in my home now is sized at slightly under 5 tons (4.5+); Later, phase 2, after I've completed some remodling it's closer to 4 tons. The lower rating is because phase 2 insulates / tightens the house and adds zoning to the HVAC. My question is this ... given that we'll be installing a top-of-the-line Carrier Infinity system how much of a problem is the extra ton?
Unfortunately I can't defer installation of the system until phase 2 of the project, and my intuition says that with a 2-stage compressor, VS fan, and zone controls, the system can handle the extra ton with no problems. The extra ton could also come in handy when we have large gatherings at our home, or we hit those really hot summer peaks here in Austin.
I'm asking here because neither my architect or either of the HVAC contractors bidding the job seem to have a definate answer.