First Time HVAC Purchase - Please Help Us
We are replacing a 25-year-old Carrier 100K BTU furnace and a 4-Ton AC unit in a 2-story 2,900 sq. ft. home in Wisconsin. Overall, the heating and cooling has been okay for the 3 years we have lived here. The worst problem is in the summer when the second floor runs about 5 degrees warmer than the first floor. We have narrowed it down to 2 dealers:
Carrier: 59MN7100 97% furnace and 24ANB748 17 SEER AC unit with a Infinity Touch thermostat and 4" pleated media filter. $7,900 after rebates
Rheem: RGFG-10EZCMS 95% furnace and 13AJN48A01 13 SEER AC unit with Rheem Communicating Thermostat and 4" media filter. $7,800 after rebates
These prices are without any zoning. I am getting mixed messages about the need to split the two floors into zones. One company tells me that the new motor will run all the time and circulate the air better, eliminating the need to spend 3K more on zoning. If needed I will add zoning later as a second trunk line will need to be added. Any thoughts on this?
Also, are whole house humidifiers a good idea? One company mentioned adding one for $450.
Any advice on the brands or the setup is much appreciated. We would like to hire someone this week. Thanks!