Design Strategies

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Night-Purge Ventilation

Night-Purge Ventilation (or “night flushing”) keeps windows and other passive ventilation openings closed during the day, but open at night to flush warm air out of the building and cool thermal mass for the next day. Night-purge ventilation is useful when daytime air temperatures are so high that bringing unconditioned…

Building Orientation

Orientation is simply what compass direction the building faces.  Does it face directly south?  80° east-northeast? Along with massing, orientation can be the most important step in providing a building with passive thermal and visual comfort.  Orientation should be decided together with massing early in the design process, as neither…

Building Massing

“Massing” is deciding on the overall shape and size of the building.  Will the building be tall or short? Long and thin?  Will it have significant cutouts, or be more solid? Successful massing uses the general shape and size of the building to minimize energy loads as much as possible…

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