04 ATTACHMENT 05 - Laserfiche WebLink

he need to conserve energy is as important to Bay-Friendly landscaping as the need to conserve water. Both are increasing concerns in California as energy shortfalls and droughts continue to occur throughout the West. Energy and water are related it takes a lot of energy to supply water to our landscapes. Conventional landscapes also directly consume large amounts of fossil fuels. Nationally, forty million lawnmowers consume 200 million gallons of gasoline per year, representing a huge investment of energy for this one landscape maintenance task. What's more, the US EPA estimates that the few ounces spilled during each refueling of lawn and other garden equipment during the summer only -totals 17 million gallons of gasoline nationwide. And energy use means releasing greenhouse gases that are contributing to global warming. Landscape designers, installers and professional maintenance staff can play an important role in conserving energy. Include these Bay-Friendly, energy conserving practices in your design or service program: I. Shade buildings to moderate temperatures Trees conserve energy by shading, cooling the air through evapo- a transpiration and reducing the velocity of ~ wind. Selecting and placing trees to ~ shade adjacent buildings in the summer or protect them from the prevailing - winter winds can moderate building temperatures. • ^ Plant trees to the west of a building ^ for maximum shading benefts. Avoid planting trees that block solar collectors or in front of south facing windows that allow the low winter sun to warm a building, especially in cooler regions of the Bay Area. ^ Large deciduous trees will be of greater value for summer cooling and winter solar gain. ^ Select evergreen trees for windbreaks. ^ Select trees that are appropriate for the soil type, water use and exposure. If possible, select trees that have low water requirements. ^ Plant larger trees at least 20 feet from the foundation. Plant smaller trees a minimum of 10 feet from the foundation. ^ For more info go to the following websites: http://cufr.ucdavis.edu and www. pge.com. When properly placed, mature trees can reduce the interior temperature of a building by as much as 20 degrees, reducing summer cooling costs by 25- 40%, and reducing greenhouse gas emissions. ~LL ~Q ~~ UW W' o~ ~z NW ¢V ~LL UU LL3 a am >o m~ w5 i¢ ~a ao 8~ This model demonstrates the shading effects of design, landscape, and orientation during three seasons of the year. 'to schedule use of the heliodon contact www Qge com/sec/heliodon. 38