going beyond conservation and suntempering to a complete System of collection, storage and use of solar energy: using more south glass, adding appropriate thermal mass, and taking steps to control and distribute heat energy throughout the house.
The ideal orientation for solar glazing is within 5 degrees of true south. This orientation will provide maximum performance. Glazing oriented to within 15 degrees of true south will perform almost as well, and orientations up to 30 degrees off - although less effective - will still provide a substantial level of solar contribution. In Louisville, magnetic north as indicated on the compass is actually one degree east of true north, and this should be corrected for when planning for orientation of south glazing.