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| Backwater valve
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Sewer line valve that prevents sewage from flowing back into the house. |
| Backyard wildlife habitat
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A backyard or limited area situation where native plants and materials are providing food and shelter for protection and reproduction for birds, insects, and mammals in ones own backyard. |
| Bacteria
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Single-celled organisms, free-living or parasitic, that break down the wastes and bodies of dead organisms, making their components available for reuse by other organisms. |
| Bad faith
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Intent to deceive from the beginning of a deal or contract. |
| Baffle
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A device, such as a steel plate, used to check, retard, or divert a flow of a material, wind or sound. |
| Bagasse
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The fibrous material remaining after the extraction of juice from sugarcane; often burned by sugar mills as a source of energy. |
| Baghouse
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An air pollution control device used to filter particulates from waste combustion gases; a chamber containing a bag filter. |
| Balance
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Making something equal. The amount remaining, as in a checkbook. |
| Balance of system
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In a solar energy system, refers to all components other than the collector. In terms of costs, it includes design costs, land, site preparation, system installation, support structures, power conditioning, operation and maintenance costs, indirect storage, and related costs. |
| Balance point
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The lowest outdoor temperature at which the refrigeration cycle of a heat pump will supply the heating requirements. Usually a temperatyre between 30ˇF to 45ˇF -- at which a heat pump's output exactly equals the heating needs of the house. Below the balance point, supplementary electric resistance heat is needed to maintain indoor comfort. |
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