I am in a process looking for a replacement of upstairs HVAC system. Total house is 3800 sqft, currently have two identical 15 y.o 2.5 tons noname systems.
Have two similary priced quotes on Lennox HVAC systems.
First is 3 ton XC13 (14 SEER) / CX34 / ML180E.
Second is 2.5 ton 13ACX (13 SEER) / CX34 / SL280V
First system is bigger and has better AC unit ("Elite Series") and basic furnace. Second is smaller and has basic AC and much better variable speed furnace ("Signature Series"). My current furnance is OK, i.e. it heating is not a problem. Cooling on the other hand was an issue updtair for the last several years.
Should I go with better AC or a better furnace? I am told that variable speed furnace will improve overall SEER rating of the system. And in the end both system will have similar SEER ratings.