Centeral air vs. window air conditioning units?

Question

...which is more economical?

Answer 1

Central air is going to cost a lot more up front, due to installation, ducting.....however, it does cool the house more evenly, and if you have a decently efficient unit, in the long run, i would say that that is probably more economical.  otherwise with window air, you either have to have several of them, uneven cooling of the house and fans blowing all the cool air around, and never close any doors.