-
1734
Frenchman John Theophilus Desagulier invents the paddle fan to ventilate mines -
1882
Schuyler Skaats Wheeler invents the electric fan -
1889
Phillip Diehl patents the ceiling fan -
1894
German Professor Herman Rietchel publishes Guide to Calculating Design of Ventilation and Heating Installations (picture form the actual book) -
1902
Willis carrier invents air conditioning oscillating fan debuts -
1911
Carrier reveals the rational psychometric formula. still the basics for the science of air conditioning -
1918
Charles Gates' Minneapolis home is the first air-conditioned house at a cost of $10,000 -
1925
Rivoli movie theaters and Broadways in NYC gets air-conditioning -
1927
Carrier Replaces ammonia with less dangerous dielene as a coolant -
1931
Freon is invented. -
1940
The Packard is the first car optional "factory air" -
1953
US sales of window air conditioner top 1 million