If your heating, ventilation and air conditioning (HVAC) system is more than 10 years old and repair costs are approaching 50 percent of the value of the system, a great deal of energy and money can be saved by upgrading to a newer, more efficient system. Depending on the Seasonal Energy Efficiency Ratio (SEER), upgrading could save you 20-40 percent on heating and cooling costs.
Using a furnace? Answering the repair or replacement question is easy. According to Annual Fuel Utilization Efficiency (AFUE) ratings, which measure furnace efficiency, systems from the 1970's offer AFUE ratings of about 65 percent, while today's models offer near total efficiency- 97 percent. That adds up to a lot of energy savings.
Replacing early in the season can get you big savings and ensure you are not left uncomfortable during extreme weather.