Trane 2 ton second zone system XL 15i, XR 15i, XL 18i, XR 17i?
Looking to add a 2nd zone to a single family house (4500 sq ft) in Northern Virginia that will provide the 3rd floor Existing system is a 4 ton XR13 heat pump (gas not available to house), which will be used for the 1st-2nd floor. Reason for adding a 2nd zone, removing a wall that contains the supply to the 3rd floor, and to better control temps on all levels.
Trying to decide what Trane 2 ton heat pump/air handler to go with. All configurations have the Trane 7 series variable speed R410a air handler (TAM7AOA24H21SB), 802 stat, ductwork, outdoor pad, strip heater (BAYEVAC10BK1AA), drain pan, new 30/60 amp circuit. Difficult to tell differences between systems except for XL's have an additional 2 year compressor warranty, proprietary condenser top (?), and pricing is very close between all.
XL 15i (4TWX5024B1000A): $9,831.57 (single stage)
XR 15i (4TWR5024G1000A): $9,556.81 (single stage)
XL 18i (4TWX8024A1000A): $10,373.82 (one compressor, 2 staged)
XR 17i (4TWR7024A1000A): $10,205.50 (two stage)
Leaning towards XL side, just for the 2 year extra warranty.