Air conditioners are probably the most necessary of all luxury and comfort items, especially if you inhabit a warm climate. I live in Michigan, which yes, in the winter months is unbelievably cold, but in July and August, 90 degrees and humid isn’t that uncommon. I’ve also never lived in a house with central air conditioning; so I know—a hot, sunny, humid day without AC is almost torture…until you get your energy bill, that is. Standard air conditioning systems have been the established method of cooling residential and commercial buildings since they first appeared in the 60 because are so effective. Put on full blast, walking into your house is like walking into the Arctic Circle. However, they suck up energy and are probably the most un-green system in your house. During peak summer months, AC is responsible for about 100 million tons of carbon emission each year.
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