In theory, it's plausible, but how are you going to vent it outside? Are you willing to make additional holes, potentially large ones, in order to vent the air that's already escaping the engine bay from below the car? Not a bad idea, but there's not really any efficiency in doing it.

You might only be getting a gain in weight loss by removing the unit and putting sheet metal in its place.

It would essentially be just a larger radiator. Might as well just install a larger radiator.

Unnecessary.

I know it's unnecessary, just an idea for hot summer days. Especially since we've had days go by that are 100f+. And figure why not ask since I have the dash off and couldn't find anything about it.

Good idea outside the box, but not really pausable.