The geometry of the SunCatcher is a critical factor in its performance. It is designed to optimize the availability of sunlight on a daily basis as well as during the periods when it is needed most for both photosynthesis and heating. This geometry dictates that the depth and height are roughly the same and the length must be at least twice the depth. Sometimes these unique geometry requirements may dictate using several smaller SunCatchers instead of one really large SunCatcher (which may in fact be more expensive to build for the same amount of floor space).
