When I had a new furnace installed 10 years ago, I included central air condition. Except for a future selling point, it was a mistake. I've yet to turn on the AC this summer.

First, we've had but one day in the 90's. It's been a relatively cool summer.
Secondly, surrounding trees keep my house pretty well shaded.
Third, I keep the house closed up except for a basement window and the "attic" windows (my third floor is finished with 2 bedrooms and bath). So hot air escapes and is replaced with cool basement air.

I can feel the "wind" moving through the whole house. It's never been over 75 degrees inside this summer. However, I do have some humidity issues, but they're minor.

As a side note, I had 100 gallons of propane delivered yesterday at nearly $4 a gallon!! And people wonder why I heat my house with wood. Propane is my backup for when I'm gone to... let's say Florida in January (hint hint Dorothy, Shelly, Laurie)!

Enjoy your weekend everybody.