In the Notheast the nights cool down. I hate being hot so I installed
a whole house fan. It does an excellent job of cooling down the whole
house and many times we get cold and have to lower it. I also have two
AC units in the wall for the days that are hot. These units are great
for the rooms that we use the most. I have friends with central AC and
it cost them and arm and a leg to run. You may want to re-think this.