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06-17-2008, 05:55 PM #1
replacement for Lennox 2-stage HS21
My Lennox HS21 two speed 5-ton unit died a couple of months out of warranty.
The inside unit is (I assume) in great shape (Harmony-II 3-zone). What would be a compatible / recommended replacement?
One contractor is recommending a Trane XR14, which I'm leaning against both because I'd prefer a higher efficiency unit and a two-stage.
is installing a single-stage A/C a really bad idea?
can the existing air handler be used with the new R-410A A/C's?