Expect an on-site evaluation
A good dealer should take a personal, thorough look at your home, evaluate your overall comfort needs and recommend the best system for you. Beware of a dealer that simply takes information over the phone. Once at your home, make sure you talk to your dealer about completing a load calculation. A load calculation determines what the proper size system is for your specific home. Most homes end up with systems that are over-sized, so you end up paying more than you should to heat and cool your home. Also, systems that are improperly sized tend to cycle too quickly or too slowly, and that can lead to maintenance problems, uneven temperatures, and an inability to control humidity.