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Telltale Clues to Your Air Conditionerâs Life Span. 1  The A/Câs age â The average air conditioner life span is roughly 15 years. If yours is over 10 years old, you can expect to see a steady loss of cooling capacity and efficiency. Older equipment is more prone to breakdowns too, so necessary repairs are more frequent.
Your air conditioner is measured in âtons.â One ton is equal to 12,000 BTUs of cooling power. So, if you have a three ton unit (the average sized unit in Santa Clarita, California) then your air conditioner has 36,000 BTUs of cooling power: 3 tons X 12,000 BTUs/ton = 36,000 BTUs.or our example today, we will use Santa Clarita, California which would have an average cost per Kilowatt-Hour of 14.37 cents. Next, multiply the Kilowatt-Hours found in step 2 by this price to find out how much it costs to run your air conditioner for one hour.