Can anyone tell me where I might find some insulation values for various spacing of window panes. Someone told me that spacing the windows more than 3/4" apart increases heat loss by increasing convection. I was also told that using multiple panes reduces moisture build up on the inner pane. My idea is to space 4? 6? window panes apart in a frame. I'm not interested in getting too fancy with adding an inert gas between the panes or trying to create a vacuum. I thought I would seat the panes in grooves cut into the frame and seat them in silicon. I thought that I would put a small tunnel leading from the outside to the last inner air space gap just below the panes with a small hole leading up to each of the air spaces. Then in the middle of winter when much of the air has gotten cold and heavy and dropped out through the small hole into the tunnel I would squirt some silicone into the tunnel and seal it. That should help reduce the moisture level inside the spaces between the panes to the same as outside in winter.