Choosing the right heating and cooling system can be a daunting task -- new technologies and more options than ever before. The old "one-size-fits-all" philosophy and "rule-of-thumb" sizing methods no longer apply.

Installed correctly, today's high-tech systems are quieter, cleaner, less prone to break-down, and far more energy efficient. But an improper installation can be costly:

• Higher installation costs
• Wasted energy dollars
• More frequent breakdowns
• Shorter equipment life
• Less comfort including:
  - Wide temperature swings
  - Cold "clammy air conditioning
  - Unhealthy mold growth

So warns the U.S. Department of Energy. Their fact sheet estimates that "well over half of all HVAC contractors do not size heating and cooling systems correctly."

And once installed, your heating cooling equipment must be joined to a ductwork delivery system that is properly designed and balanced if it is to deliver the comfort and efficiency promised. An improperly installed system can rob as much as 50% from a brand new system's rated efficiency. 

The more learn about your choices, the better you will be able to judge the choices you face.

Understand How Systems Work.