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Ecology & Energy Savings
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Source: PG&E's Website http://www.pge.com/003_save_energy/003a_res/index.shtml Acrobat file http://www.pge.com/003_save_energy/003a_res/pdf/cooling2.pdf
CONSIDER AN EVAPORATIVE COOLER This low-cost cooling method works by drawing air through a wet pad. The temperature of the ambient air evaporates the water in the pad, resulting in a cooling of the output air. This cool air is then blown into the living space by the unit's fan. Some homes use attic vents that are opened automatically by the evaporative cooler, allowing a free air exchange while letting the conditioned indoor air cool the attic on its way out. Evaporative cooling works well in California's dry climates. It is most often used in warm areas between the hot central valley and the cool coast and mountain areas. The price for an evaporative cooler is as little as one-fourth the cost of a central air conditioner, and operating costs are only one-fifth as much. Consider this option if you're adding cooling to a house without ductwork, you want lots of fresh air, costs are critical and regular maintenance isn't a problem. It's not a good option if you want to keep temperatures automatically below the low 70s. Recently, manufacturers have introduced a major improvement in evaporative cooling. Dual cooling methods are used, making the air 6 to 8 degrees cooler than with a conventional evaporative cooler while using only half of the energy. These "two-stage" systems should become more common in the future. A homeowner or handyperson can do the simple but regular maintenance required on an evaporative cooler. However, some of the least expensive units can rust through and may need replacing every 5-10 years. An evaporative cooler needs regular cleaning because it's an excellent filter, trapping a lot of dust and pollen. Cleaning is as simple as washing the unit out with a hose, which is especially easy if the unit is mounted on a wall or through a window.
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Installer/Service tech Position Opening as of 5/1/07 | ||||||||||