Mountain Institute. The office uses energy from the sun by using heavy roof insulation, thick stone walls, energy efficient windows and a wasteheat recovery system, providing 99% hot water, 95% daytime lighting, and 90% household electricity. It also contains a greenhouse containing a variety of plants to humidify the building, help heat air and purify it. 2) Energy efficiency is the measure of how much work we can get from each unit of energy we use. Each unit of energy saved eliminates the need to produce that energy and it saves us money…
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