yeah i am building a box to put them inside, whit the exhaust out of the windows .
It kinda will have two sides and intake will facing inside the buildingn whit the extra roof.
You've got it backwards, you want intake to be from the windows outside so you intake cool air. You want exhaust pointed inside so you heat the inside of your building during the winter "for free".
I would be pretty scared of this box outside. You have to make it where air can escape depending on box this could allow snow/water/ice/etc from -20 not sure what you will get with hot miners beside it.
But I would look at way's to put miners inside and exhaust outside. Water damage could be very bad.