My sister needs a new roof-top packaged unit (electric/gas). She would like a higher efficiency unit. I noticed Trane makes a 16 SEER/80% with 2 stage and variable fan. The other websites don't reflect higher efficiency packaged units (usually 12 SEER without VS). I know the other manufacturers may have models not listed on their website.
Any other recommendation on a higher efficiency packaged unit would be appreciated.
Thanks very much.