Compared to older magnetic ballasts, electronic ballasts use less electricity and are not prone to the flickering and humming effects sometimes associated with magnetic ballasts. The ratio of the cooling capacity of the air conditioner, in Btu per hour, to the total electrical input in watts under test conditions specified by the Air-Conditioning and Refrigeration Institute . Exterior Sheathing The first covering of boards or of waterproof material on the outside wall of a frame house or timber roof. Taping the joints in this layer of material will help prevent air inleakage. Fluorescent Lamps Fluorescent lamps produce light by passing electricity through a gas, causing it to glow.
Fluorescent lamps produce much less heat than incandescent lamps and are more energy efficient.
Linear fluorescent lamps are used in long narrow fixtures designed for such lamps. Compact fluorescent light bulbs have been designed to replace incandescent light bulbs in table lamps, floodlights, and other fixtures. Global Warming Global warming is the gradual increase in global temperatures caused by the emission of gases that trap the sun's heat in the Earth's atmosphere. The carbon dioxide emissions are primarily caused by the use of fossil fuels for energy. For more information, visit the U.S. Environmental Protection Agency's Global Warming Web site , the Environmental Defense Fund's Global Warming Web site , or visit ABC News' Solutions to Global Warming Web site .