Топик: Printing problem led to first air conditioner

It was also in the late `30s that the availability of Freon, a nonflammable refrigerant, made room air conditioners possible. The units could be made safer and for less money, since Freon was especially suitable for small units with less capacity. Carrier played no part in the development of Freon, but he was quick to make use if it as a pioneer in the field of small units.

Willis Carrier died in 1950, before home air-conditional systems became common. That was a development he likely could not have foreseen back in 1902 when he set out to find a way to improve printing.