Your home’s air conditioner works by cycling the warm air in your home through the evaporator coil (located in your air handler). The air is cooled in the coils by freon, which is then pumped back through your duct work and into your home. This is a continuous process that repeats until your thermostat is satisfied. The process is similar to how your refrigerator works, but on a larger scale.
If your HVAC system is more than 10-12 years old, it is using a freon called R-22. This freon is being phased out rapidly by the government, directly affecting everyone from manufacturers to contractors to you, the homeowner. It has been replaced by a more eco-friendly freon, R410-A,which is in all equipment manufactured after 2007. This new R410-A equipment is more energy efficient, with up to 20 SEER (Seasonal Energy Efficiency Rating) available!
Thanks to the technologies available in new HVAC systems, replacing your old unit with a new Energy Star rated system can save you up to 20% of your current cooling (and heating) costs!