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Passive Design
Randall Millennium Homes are designed with care to take maximum
advantage of seasonal changes in solar altitude. The relationship of
roof overhang to south window placement and the projection of the
SIP wall beyond the foundation to south window placement have been
calculated to maximize passive solar heating in winter while
minimizing influx of solar energy during the summer. The solar
shading renderings show the sharp contrast between seasonal
extremes.
Click thumbnails for larger view of renderings. Use browser back
arrow to return to rendering gallery.
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Front Corner
June 22
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Back Corner
June 22
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Front Corner
December 22
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Back Corner
December 22
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The use of precast concrete hollow core plank deck for first floor
is closely related to this passive solar heating. The mass of the
concrete is calculated to absorb the incoming solar energy into its
considerable thermal mass, warming only a few degrees and later
slowly releasing that energy as radiant heat over several hours. A
similar home with wood frame floor construction would experience
overheating during the late morning and afternoon, followed by a
sharp drop in temperature after sundown.
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