10. Often abbreviated as A.C.

9. Invented by the same person who invented hair conditioner

8. When proposing, half of men give an air conditioner instead of a diamond ring

7. Ancient Egyptians employed a form of primitive air conditioning called "wind"

6. Dick Cheney conducts many financial misdeeds in air conditioned rooms

5. Without it, Miami would be a ghost town

4. The European Union won't accept Poland as a member until after all their air conditioners are Energy Star compliant

3. Concept of variable settings introduced by Ed Low and Jim High

2. That familiar hum? The compressor releasing deadly hydrogen sulfide

1. 20% of all air conditioning in the United States is used in the Ed Sullivan Theater