I have a 3 level exposed basement house (3600 square feet). No time is spent in the basement and most of our time is spent on the main floor. Upstairs mainly for sleeping. We currently have a 3 ton that needs to be replaced. My options are 1) simply replace the 3 ton, 2) zoning with 1 system and 2 t-stats and 3) 2 seperate systems.
2) zone 1 would be basement and main floor (2400 sf), zone 2 the upstairs. Do I stay with the 3 ton (variable speed, 2 stage) or move up to a 3.5 ton (variable speed, 2 stage) as recommended? House cools fine with a 3 ton, I just want the added benefit of 2 t-stats and upgrading to a better 3 ton.
3) The 2 systems would be dedicated as layed out for zoning. Being told to use a 2.5 ton for the 2 bottom floors and 2 ton for top floor. Is this too much? Will a 2 ton for each system work just as well?
One company said zoning would work fine on our house (said that is what he would do if it was his house). The other guy said zoning wouldn't work with our layout. 3rd guy coming out on Friday. Any thoughts?