David Johnston > Quotes

“successful passive solar designs need many fewer windows—the equivalent of between 8 percent and 12 percent of the floor area in rooms with south-facing windows. That”
― David Johnston, Green from the Ground Up: A Builder's Guide to Sustainable, Healthy, and Energy-Efficient Home Construction

“Ideally, major windows should face within 30° of true (not magnetic) south. The deviation between true and magnetic south varies depending on where you build.”
― David Johnston, Green from the Ground Up: A Builder's Guide to Sustainable, Healthy, and Energy-Efficient Home Construction