| Key Features of an HVAC System
While the first considerations when buying a new home are usually the plumbing fixtures, cabinets, counter tops, or floor treatments, the heating and cooling system is often the feature with which most people are dissatisfied after they've lived in the home for a while.
 The important features of an HVAC system are:
Design and type of duct work - If the ducts aren't sized and balanced properly, the home will never be comfortable. Externally insulated round ducts are the most efficient; long runs of flexible duct are the worst.
Refrigerant - Federal law requires R-22 to be phased out in 2015; what little that remains available for servicing after that will be very expensive, so consider using the environmentally friendly R-410A.
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