Filtration

Check your filter at least monthly and clean and replace as needed. A dirty air filter limits airflow, which can cause the compressor to run longer, cause the heat exchanger to overheat and increase utility bills by up to 20 percent or more.

The average lifespan for a high-quality cooling and heating system is 8 to 12 years, depending on the amount of use, the climate in which it operates, and whether or not the system received regular preventive maintenance. The criteria for determining repair or replacement are how much of a repair bill you're faced with today, how long you can expect before other problems arise based on the age and condition of your system, the cost of a replacement system, and whatever advances in technology and efficiency manufacturers have made since the installation of your current unit. Today's systems are as much as 60 percent more efficient than those manufactured just 10 years ago. The savings in efficiency alone might be enough of a return on your investment to replace now instead of enduring another season of costly repairs.

There is, of course, no absolute right answer, but the experts at John C. Cassidy can help you make an educated, informed decision.