Why Switching to a High Efficiency AC System is a Wise Option
http://elliottkqwg956.withtank.com/why-changing-to-a-higher-performance-air-conditioner-is-a-smart-option/
Three-quarters of all homes in the US have an air conditioning system. Ac systems utilize about 6% of all the electricity produced in the United States, at a yearly expense of about $29 billion to house owners.