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Save ENERGY, Save MONEYConservation Practices that Save: Windbreaks/ShelterbeltsFor homeowners in rural areas, well-designed windbreaks can cut home heating costs by 10 to 25 percent. Up to one-third of the heat loss from a building is caused by air leakage through cracks and other openings. High winds can force cold air through cracks around poorly fitting windows or frequently opened doors, aggravating the heat loss from unprotected buildings. Windbreaks reduce the force of the wind on the exterior surfaces of buildings and thus the amount of cold air that enters the home.
Windbreaks or shelterbelts are barriers used to reduce wind speed and usually consist of trees, shrubs, or a combination. For the greatest protection, the windbreak needs to be oriented perpendicular to the troublesome winds. The reduction in wind speed behind a windbreak modifies the environmental conditions in this sheltered zone. The sheltered zone extends as far as ten to fifteen times the height of the windbreak downwind from the windbreak. The greatest wind reduction occurs between two to five times the height of the windbreak downwind. For maximum wind protection, the windbreak needs to be dense and tall.
Home heating savings are not the only energy benefit from windbreaks. Windbreaks are very effective in controlling drifting snow. By strategically locating windbreaks upwind of roads and highways, blowing snow can be reduced, resulting in less snow accumulation and ice development on roads. This results in less fuel being used to remove snow from highways. This windbreak application is also known as a living snow fence. In a State like Minnesota, where the State spends an average of $100 million per year in snow removal, this can be a significant savings. Minnesota performed a cost-benefit analysis of living snow fences and found that for every dollar spent on a living snow fence, there was a $17 return. This included not only the savings in fuel but also less economic disruption resulting from closed roads. The living snow fences also can save lives by improving driving conditions during the winter. Windbreaks also: Download and open this feature usingAdobe
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