If your HVAC equipment is more than 10 years old or it is not heating or cooling your house as you would like,  have it looked at by an a  HVAC technician. If it turns out that it is not performing efficiently or needs upgrading you should really consider replacing it with a unit that is ENERGY STAR qualified. Replacing your old heating and cooling equipment with ENERGY STAR qualified equipment can actually cut your annual energy bill by about $200.  You can also receive up to $1500 in rebates for installing  a new AC and or Furnace.  Call A 24 hour air conditioning repair Denver technecian today.