I have a 2373 sq. ft. cape cod,I have talked to many different hvac contractors and have had different answers. Everything from one 4 ton to, 3 2 ton. I need help, here is a link to a pic of my floor plan.Houseplans.com | Plan Details 17-421 (http://www.houseplans.com/plan_details.asp?id=8304)

A good contractor that gives you referances, and stands behind his work and equipment ,is very important,, be sure to check him out,, should know what you need after looking over your house,, check with people that have been around for a good while,, get several estimates,, good luck,,

Have a manual J done and a manual D also.The J will tell you the size of equipment you need and D duct size.