Even though I've had my Roadster for over two years now, I have never charged it inside a fully enclosed garage except once. That one time was in a very small one car garage and I had just driven 140Miles. It got pretty hot inside, so much so, that we kept the garage roll up door opened a few inches overnight. I'm about to move into a house with a two car garage a little over 400 sq-ft. Should I plan to install some extra ventilation? It has typical vents near the ground in four places. The roof is flat and insulated (foam roof).