"stryped" wrote in message
...
I have a 30x30 metal building. I have no windows. What would be the
best and cheapest way to air condition it? I thought about a window
unit but I have no windows and not sure if cutting the corregated
metal would work right.

Depends on the construction. You can easily cut a hole, but supporting a big
enough AC will take some extra reinforcement. Add a couple of braces that
take the weight on the ground. In reality, all you have to do is cut an
opening the size of the ac, make a tray for it to rest on with legs secured
in the ground, both inside and outside if needed, put the AC into place.

Next is air circulation. You may want to have a fan blowing the air around
inside as 30' is a long way to go. As for size, that depends on how much
insulation and ceiling height, etc. You may need two if you go for window
shakers. They will be 220V on the larger size too.

You can always go for a split system.