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BPI _ Building Science Principles (GLOSSARY).
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BPI _ Building Science Principles (GLOSSARY).
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BPI _ Building Science Principles (GLOSSARY)1. 217.- Weatherstripping: An energy efficiency measure that involves installing a
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material to seal air leaks around components that open, close, and generally move
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(exterior doors and windows).
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2. 2.- ”P (Delta P): The difference in measured air pressure between
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3. 3.- ”T (DeltaT): The difference in temperature between two area
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4. 4.- Air Barrier: A material used for controlling air flow
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5. 5.- ACH (Air Change per Hour):How air exchange rate is typically expressed
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ACH = CFM x 60 / volume
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Example:A house is leaking at rate of 67 CFM.the volume of the house is 8,000 cubic
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feet (cu. ft)
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ACH = 67 x ,000 =4,,000 = .5
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6. 6.- AFUE (Annual Fuel Utilization Efficiency): A measure of how efficiently a
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furnace or boiler converts fuel to heat, on average, over a typical year.
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7. 7.- Air change rate: The number of times the interior volume of air changes over one
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hour.
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8. 9.- Airflow: The movement of air in the house
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9. 8- Air Sealing: The practice of installing appropriate materials to stop airflow in
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certain areas of the house
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10. 10.- Algorithm:A formula that energy modeling software uses to estimate a
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house's energy usage
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11. 11- Argon: An inert gas that can be placed between the panes in a multi-pane
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window to further improve the window's thermal resistance.
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12. 12.- AtmosphericVent: A type of heating system vent in which combustion by-
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, products exhaust from the house up through a chimney by stack effect due to the
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natural buoyancy of hot gases.
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13. 13.- Attic: The indoor space under the roof at the top of a house.
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14. 14.- Average R-value: A way of determining the R-value of a space that has
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adjacentareasof differingR-values(anatticfloor withinsulationeverywhereexcept
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around the hatch).
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15. 15.- Awning:An element that can be installed on the exterior of a house over
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doors and windows to provide shading.
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