The room is about 8x8x10 or so. As far as the light mover goes...wish we had done it. For those of you who are debating one, DO IT. We currently rotate our plants every 3 days to try to even out the lighting but still ask myself the "what if..." about the mover.
The window box has a 2x4 frame around the edges and is screwed to the wall using L brackets. This box is damn near air tight around the edges, meaning the exhuasted air actually leaves the room and doesn't leak back in. The window is opened about 6" or so, directly where the ducting goes through the plywood. In this spot, the curtain does not over the exhaust, as it would block airflow and cause the hot air to back up in the window box. So from the outside all you see is a small rectangle on the bottom corner of the window that is not covered by the curtain while the rest of the window is. Also, outside we have a large tree that blocks the majority of the window from any lurking neighbors.
T-minus 31 days until harvest!