Can someone explain what the natural ventilation code is? I was wanting to use "fixed" windows and a door instead of casement or sliding doors, but was told that I could not do that because of "natural ventilation code requirement" which prevent doing this. I don't open the windows anyway, so I didn't want the extra expense of putting them in.
Also, I was told that Simonton were good windows. Can you tell me how they compare to Andersen 400 series?...cost and efficiency?