• Willis Carrier patents his invention for central air conditioning in 1906, calling it an Apparatus for Treating Air." • In 1917, two commercial buildings were the first to incorporate central air: the New Empire Theatre in Montgomery, Alabama and the Central Park Theater in Chicago. • A major study in 1950 shows that families living in air conditioned homes sleep longer in summer, enjoy their food more, and have more leisure time.• With innovations in refrigeration and air conditioning going hand in hand, frozen TV dinners were first mass marketed in 1955. • Chloroflourocarbon (CFC) production in the United States ended on December 31, 1995 to help protect the earth’s ozone layer. • Central heating systems were used in northern Roman cities in the 100s . Air heated by furnaces was led through empty spaces under the floors and out of pipes in the walls - this system being termed a 'hypocaust'. • In 1716, water was first used to spread the heat. This system was used by Martin Triewald, a Swedish engineer, on a greenhouse at Newcastle upon Tyne. • 38% of household energy costs can be attributed to the heating and cooling of your house, according to the U.S. Environmental Protection Agency (EPA). • According to environmentcolorado.org, you can allow your home to naturally heat in the winter and maintain lower temperatures in the summer when you plant trees that shed their leaves at the end of a growing season on the south and west sides of your home.
