On a hot summer day, there are few appliances more useful than the window air conditioner.
And they do this in a remarkably small space, without having to knock holes in the wall.
So, how do these miracles of cool work?
Fundamentally, a window AC unit is a pump, one that shifts heat instead of water.
Combine this with a fan that circulates the air through the unit, and you get air conditioning.
This coolant is used because if you compress it, it becomes a liquid.
These two states are the mechanism that moves the heat from inside your house to outside.
This liquid passes through the outside radiator, where it sheds heat into the outside air.
This makes the coolant evaporate, which cools it down.
From there, it passes through the inside radiator, and the air passing over this is cooled.
The coolant absorbs the energy (the heat) from the air inside the room, cooling it.
Most window AC units range from 2,000 to 25,000 BTU.
