hey all, i just had my heil dx 1400 5 ton unit installed here in ny where it was a very humid 90 degree day. the house went down to 70 with no problem. it was about 78 before the unit was run, and i say in about 2 hrs is was at 70. i think 70 will be my night, and at home temp. now while we are away at work during the day what is the best temp to set the thermostat at? is 76 too high? again i will go for 70 from 5 pm till about 8 am, and it will stay at 70 for most of the weekend as we are home, but i am unsure what the optimum temp to set for when the house is not occupied by the family. thanks for the help. by the way the unit is great, very good looking, and very quiet, more so than i thought.