Passive solar heating uses the sun’s energy to warm a space without mechanical systems. It relies on building orientation, window placement, insulation, and thermal mass materials that absorb and release heat. The design captures solar gain in winter and helps manage cooling in summer.
/ˈpæsɪv ˈsoʊlər ˈhiːtɪŋ/
Passive solar heating uses the sun’s energy to warm a space without mechanical systems. It relies on building orientation, window placement, insulation, and thermal mass materials that absorb and release heat. The design captures solar gain in winter and helps manage cooling in summer.
What makes heating passive solar?
It uses building design and materials to collect and store solar heat without mechanical equipment.
Source: The Cooling Company
Orientation, glazing, shading, and thermal mass work together.
Homes with south-facing windows and thermal mass floors capture winter sun for warmth while overhangs reduce summer heat gain.
Designing for passive solar from the start yields the best results, but retrofits like improved glazing and shading can still help.
“Designing for passive solar from the start yields the best results, but retrofits like improved glazing and shading can still help.”
Well-designed passive solar homes can cut heating costs by 50% or more.
Does passive solar work in all climates?
It works best with good sun exposure and careful design, but strategies vary by climate.
Can I retrofit passive solar features?
Yes. Window upgrades, shading, and added thermal mass can improve solar performance.
Is passive solar heating enough on its own?
Often it reduces heating demand but still needs a supplemental system for extreme conditions.
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