Systems that are too large cool your house quickly, but may not feel comfortable. They leave to much humidity in the air, and the frequent cycling (too many starts and stops) shortens the life of your equipment. A system that is too small simply can’t cool your house enough. Many factors go into determining the correct size. Type of home and walls, type and size of windows, insulation, basement and attic conditions, house orientation, etc. An in-home consultation by an experienced HVAC tech is the best way to get the right system for your home.