what is the most efficient air conditioning system for an 8 room one story rancher 1750 sq ft liv space?

Question

or a combination heating system I now have a oil fired boiler in my garage an a 2 ton Bryant air conditioner that is 18 years old now i know that there must be a more efficient system out there now . To maximize my heating an cooling dollars now in 2007 . My home is insulated well I live in Maryland where the winters are not harsh but very humid here in the summer months an i have tyvek, an vinyl siding on my house I have tired to update my house an my finances would allow me to do .

Answer 1

the bryant is one of the best to have and is very effcient.