Another important tip that Marcus Hiles has for homebuyers and renters regarding their air conditioning bill is to look for properties that come with newer central air conditioner units that have a SEER rating of 16 or higher. With a newer unit compared to a unit that has a SEER rating of 10 you can see air conditioning costs dropped by up to 60 percent. Hiles implements this same practice in all of the properties he develops, saving renters over $424,000 every year. That equals more than $6 million saved over 5 years. There is also the factor of carbon emissions. Hiles’ newer air conditioning units will lower carbon emissions by up to 327,000 tons over ten years.