Wind Scoop

[wes]

Actually, compressing air or any gas makes it hotter, and allowing a compressed gas to expand makes it colder. When your air conditioner is running durng the summer, the outside unit (compressor) is compressing gaseous freon, and your compressor unit gets very hot as a result. The compressed freon comes back into your house and is allowed to expand inside the coils of your fan unit, which makes it very cold. This continuous cycle of compression outside the house and expansion inside the house is what transports heat from inside of house to outside. And I say hurray for that, because it's been 96 degress in NC this past week and if we had no air conditioning I'd have to move to New Hampshire.

- Wes

[Billy]

you are right, the expansion of compressed air is what is cold. Like a can of duster for the keyboard.