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The American engineer Willis Carrier invented the modern air conditioner. Carrier devised the first modern system of air conditioning in an attempt to resolve various quality issues at the Sackett-Wilhelms Lithographing ... More »

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According to Carrier United Technologies, Willis Carrier invented the modern air conditioning system in 1902. Carrier's invention gave rise to many industries within today's economy. More »

www.reference.com History Inventions

For very hot climates, a 1-ton air conditioner can cool approximately 400 square feet, but in cooler climates, the same air conditioner could cool 800 square feet. The cooling capacity of an air conditioner is greatly de... More »

www.reference.com Home & Garden Heating & Cooling
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According to Carrier United Technologies, Willis Carrier invented the modern air conditioning system in 1902. Carrier's invention gave rise to many industries within today's economy. More »

www.reference.com History Inventions

The first headphones were invented by American engineer Nathaniel Baldwin in 1910. His invention was the end result of experimentation with the principle of sound amplification by compressed air. Baldwin patented and the... More »

www.reference.com History Inventions

Modern electro-mechanical air conditioners were first created in 1902 by Willis Carrier. He created the device to improve manufacturing process control in a printing plant. More »

www.reference.com History Inventions

Baby cages were a 20th century invention that allowed city-dwelling parents without balconies, yards or other outdoor spaces to give their babies some fresh air; these cages were fitted into windows and allowed the child... More »

www.reference.com History Inventions