Also, what would be the suggested way to vent the hot air to the outside in the summer? I can hook up a vent to go to the outside through the wall and use dryer vent.
This is where you have to look at your situation and use some creativity. Remember that when you're venting all that hot air outside, you're pulling in the same amount of outside air somewhere else. You don't want to be sucking outside air into your living room and exhausting air conditioned air from your mining space. In other words, make sure you plan for air intake as it is also important.