Heater Box Design - Lame?

....The heater core probably does help cool down the engine somewhat.....
Not really sure about it helping the cooling much at all if it doesn't have air blowing through it to transfer heat out to the interior. Once the air in the closed box is heated what more can it do to cool?
If the box temp is not wanted inside, slap a valve on it and stop the flow. I doubt you'll see over heat issues.


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