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Nature’s air conditionersWed, 08/02/2006 - 8:57am
By: The Citizen
If you have ever escaped from blazing hot sun in a shady spot under a tree, you know how these natural air conditioners can make you feel more comfortable. A mature shade tree can block up to 90% of solar radiation, which could translate to a significant reduction in your home cooling cost. A Pennsylvania study found that air conditioning needs could be reduced by up to 75% by shading a house with trees! Computer models devised by the U.S. Department of Energy predict that the proper placement of as few as three shade trees will save an average household $100 - $250 in energy costs each year – and that study was done before energy costs soared! Solar heat absorbed through windows and roofs increase air conditioner use. Incorporating shading concepts into your landscape design can help reduce this solar heat gain, reducing your cooling costs. With the increased costs of using fossil fuels for heating and cooling our buildings, it only makes good sense to take advantage of these principles. What to do Deciduous trees with high, spreading crowns can be planted to the south of your home to provide maximum summertime roof shading. Trees with crowns lower to the ground are more appropriate to the west, where shade is needed from lower afternoon sun angles. Trees should not be planted on the southern sides of homes in cold climates because the branches of these trees will block some winter sun. Although a slow-growing tree may require many years of growth before it shades your roof, it will generally live longer than a fast-growing tree. Also, because slow-growing trees often have deeper roots and stronger branches, they are less prone to fail during windstorms or heavy snowstorms. Slow-growing trees can also be more drought resistant than fast-growing trees. Trees, shrubs, and groundcover plants can also shade the ground and pavement around the home. This reduces heat radiation and cools the air before it reaches your home's walls and windows. Use a large bush or row of shrubs to shade a patio or driveway. Plant a hedge to shade a sidewalk. Build a trellis for climbing vines to shade a patio area. Beyond energy savings and beauty, homeowners who take care of their trees and keep manicured yards find the value of their properties increase. A research study at Clemson University lists maintaining beautiful landscaping as a cost-efficient way to increase the value of a home. In a comparison of house prices to house characteristics, location and landscape quality, the study showed houses which obtained an “excellent” landscaping rating from a local landscaping professional could expect to sell at a price six to seven percent higher than equivalent houses with a “good” landscaping rating. Improving landscaping from “average” to “good” resulted in a home premium about five percent. Find a professional |