Quick Answer
The surrounding landscape significantly impacts solar efficiency in homes by altering the amount of direct sunlight and heat gain. Shading from trees, buildings, or topography can reduce solar output, while a clear view of the south horizon can maximize solar gains. Careful landscape design can mitigate these effects.
Landscape Impacts on Solar Efficiency
The surrounding landscape plays a crucial role in determining the solar efficiency of a home. Trees, for instance, can provide natural shading, but if they obstruct the view of the south horizon, they can significantly reduce solar gains. A 20% reduction in solar output can occur when trees are within 10 feet of a south-facing glazing.
Passive Solar Design Techniques
To mitigate the impacts of the surrounding landscape, home builders can employ passive solar design techniques. One effective strategy is to orient the home to maximize the south-facing glazing, which can receive up to 75% of the available solar radiation during the winter months. Overhangs, awnings, and brise-soleils can also be used to control direct sunlight and reduce overheating during the summer months. By strategically placing thermal mass elements, such as concrete or brick walls, heat can be stored during the day and released at night, reducing the need for artificial lighting and heating.
Landscape Design Strategies
Careful landscape design can also help to maximize solar efficiency. Strategically pruning or removing trees that obstruct the view of the south horizon can increase solar gains. Planting trees or shrubs on the north side of the home can provide natural shading during the summer months, reducing the need for artificial cooling. By creating a clear view of the south horizon, homeowners can take advantage of the free solar energy available and reduce their reliance on non-renewable energy sources.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.