|Form for Heating|
|Direct Gain: Heat Storage|
|Clerestories and Skylights|
Solar glazing (facing the equator) is sized to admit enough sunlight on an average sunny winter day to heat a space over the full 24-hour period.
Orient solar glazing within 15º of true south in the Northern Hemisphere, or true north in the Southern Hemisphere, and no more that 25º from either orientation. Store a portion of the heat gained during the day for release at night by locating thermal mass in the space. In very cold climates, incorporate moveable insulation over the glazing at night.
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