Passive Solar Design for the Home

rate passive solar design into the. home, which then becomes in effect …. The Passive Solar House: Using Solar Design to Heat and Cool Your Home. …

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Passive Solar Design for the Home
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P assive Solar Design for the Home SECO FACT SHEET NO. 17 PASSIVE SOLAR DESIGN FOR THE HOME P.1 HIGHLIGHTS N Direct or indirect gain, solar heating can save money N House orientation and window sizing are keys to proper design N Thermal storage helps control overheating of spaces N Porches and trees are important elements in solar control SUMMARY Solar orientation for heating and cooling is not a new idea. Builders in China and Greece were designing buildings that captured the heat of the sun well over 2,000 years ago. Buildings in any climate can take advantage of the sun. All that is required is a willingness to incorpo- rate passive solar design into the home, which then becomes in effect a large solar collector. ANGLING FOR MAXIMUM EFFICIENCY Except for locations near the equa- tor, the sun is much lower in the sky during the winter than it is in the summer. Solar homes are designed to take advantage of the changing position of the sun to allow sunlight to shine into the house in the winter and to block it during the summer. To achieve that objective, homeown- ers and builders must know the actual sun angles at various times of the year. Using that information, they will know where to place win- dows and overhangs. SECO FACT SHEET NO. 17 DIRECT-GAIN SYSTEM The simplest way to incorporate passive solar heating is to just let the sun shine into the home. Known as a direct gain system, this design uses south facing windows to admit heat from the winter sun (See Fig. 1). That heat is then stored using ther- mal mass. During the summer, when the sun is higher in the sky, the sun is blocked by window over- hangs. For Texans, the most impor- Summer Sun Summer

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