wrote in message
...
I just had a new HVAC system installed in a new house and have not paid for
it yet. Today the temperature is 100 outside. I have my thermostat set
to
77 and the actual temperature is 81. (This is upstairs, downstairs a
separate system is maintaining the selected temperature.)

I am getting about a 20 degree drop. Is that acceptable or should the
system be doing better?

Wait another day. You have two thermostats? Try setting the upper level
thermostat a bit lower.

Two-story houses are difficult to balance because the cold air is denser and
falls to the first floor.