• In 1902, the young engineer Willis Carrier designed, tested and installed the first industrial installation of air conditioning for large printing.

• In 1911 Carrier presented the psychrometric chart, linking graphically psychrometrikes properties of air and the corresponding loads.

• In 1920 occurred the first household refrigerators in the US.

• In 1930, some large buildings in the US already had air conditioning.

• In 1930 became the first serious efforts to manufacture air conditioners use and safer refrigerants, such as Freon-12.

• In 1945, increased requirements for buildings with central air conditioning systems.

• With the first energy crisis in 1973, took off the price of fuel and electricity to run the cooling systems and air conditioning.

• In 1987, in Montreal, Canada, the governments of all countries of the earth have committed to gradually discontinue the use of refrigerants are harmful to the environment, such as chlorofluorocarbons, or CFCs.

• To 1992, in Rio de Janeiro, Brazil, the international community committed itself by signing the Treaty, to drastically reduce emissions of carbon dioxide (C02).