Air conditioners these days are much more energy effecient than they were 10 yrs ago.  A 10 Seer unit was a good unit back then, but now not very efficient.  Today AC’s are 13 Seer and 14 Seer and up.  They use less electricity and cool twice as well and run much quieter.  Start saving today by replacing your  older AC by calling Premier Air Colorado today at www.303-993-9060 and visit our website for more information at www.premieraircolorado.com