On arrival dnstrs star was set at 78 and reading 77, system was running, thru discussion w it customer she had raised temp from 74 to 78 approximately 1hr prior. Upstrs stat was set at 80° and reading 80°.Temp test at 60° outdood Return air 84° and supply was 105° with second stage supply was 140° System function normal Comparing dnstrs to upstrs most all heat produced from dnstrs will rise to second floor