I am thinking about upgrading my 10 SEER single stage HP system to a 20 SEER Trane unit. The question I have is will I need to replace the tstats and /or zone system if I upgrade to a 2 stage system. The zone system is a Honeywell EMM-3U with 2 T8011R tstats. The house was built in "05
Home info. I live in NE Florida and have a 2155 sq ft house with bonus room. Bonus room has the other tstat. The rest of the house is controlled by the other tstat.