Your heating and cooling system is a large investment in both time and money.  The purchase decision you make today is one you'll likely live with for the next twenty years.  Consumers purchase heating and cooling systems for many different reasons: Failure of old equipment; Efficiency; Comfort; Maintenance; New homes/additions; and the list goes on.  In the end the largest factor in making your decision comes down to Value.  The contractor you choose to purchase and install your system from is probably more important than the brand you choose.  After all, once the furnace or air conditioner leaves the assembly line at the factory the performance and functionality of the system is out of their hands.  By educating yourself on what to look for in a contractor you are equipping yourself with the power of knowledge.  knowledge of what provides you with the most Value.  Follow the following EPA Energy Star link to receive Ten Tips for Hiring a Heating and Cooling Contractor.

"There is hardly anything in the world that some man cannot make a little worse and a little cheaper.  And the people who consider price only are this man's lawful prey"

John Ruskin