Very Interesting High Temps Solution.

[stinkyattic]

A bit about heat... it is moved in 3 ways: Radiation, convection, conduction. Radiation is what causes the heat burns on your leaves. Convection is why it is warmer near the top of your room... and why you should put the active exhaust up there to take advantage of that. The last is what you are thinking of utilizing... sorta...

but we realized that the problem is that if the air going in is warm already, you're screwed.

Right, which is the reason to use an ACTIVE intake and draw pre-cooled air from a cold place such as a basement of a room with ac.

Computer processors, motorbike motors, lots of other things are cooled by having a fan blow over cold metal.

Actually this is not how it works... the fan blows over HOT metal. The heat sink thing is securely fastened to the item to be cooled (heat is conducted into it) and the many small flanges on it create a greater surface area to be air-cooled, helped along by a fan.

We thought that if we could think of a construction whereby the intake has to pass over a fair sized amount of metal, it should cool it.

This will simply heat the metal. If you are passing air over very CHILLED metal, the heat will come out of the air and warm up the metal, making the air a bit cooler... but this isn't a practical way to cool a room!

Then I went home. Sat there thinking that glass should be just as bad a conductor of heat as metal,

No, metal is a fabulous conductor of heat. Glass, not nearly so much. Glass is actually a pretty decent insulator. When you are running an air cooled hood, the heat is primarily passing through the glass as radiation.

You just need to add an ac to your op and play with bringing very cold air into your room, allowing it to be heated or whatever, and then exhausting it OUT of the house entirely.