Heating and Cooling cost the average homeowner about $1000.00 a year-nearly half the home's total energy bill. If your central air conditioning unit is more than 12years old, replacing it with an energy star qualified model could cut your cooling cost by 30%. 

Ducts that move air to and from a forced air furnace, central air conditioner or heat pump are often big energy wasters. Sealing and insulating ducts can improve the efficiency of your heating and cooling system by as much as 20 percent-and sometimes much more.