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For specific hazard 3. Summary of Test Method 3. Terminology 4. In addition, it can affect Current edition approved June 10, Published November Originally occupant comfort and indoor air quality. Last previous edition E —87 E1.

List the height above ground at which wind speed is Symbol Quantity Unit measured. In most for personnel who must be close to the noise that may be residential buildings, indoor-outdoor air exchange is attribut- generated by the fan. Exercise similar combustion equipment in the building. Active measurements and is intended to characterize the air tightness combustion devices require a properly trained technician to of the building envelope.

It can be used to compare the relative shut them off or to determine the safety of conducting the test. Procedure same building envelope, and to determine the air leakage 8. Apparatus difference. Verify this condition by differential pressure mea- 6. Make these apparatus.

Any arrangement of equipment using the same measurements at the highest and lowest level of the building principles and capable of performing the test procedure within and on the windward and leeward sides. Fireplace and other operable dampers should be 6. The system shall provide constant airflow building. Take notes on the windows, doors, opaque walls, at each incremental pressure difference at fixed pressure for the roof, and floor. Where 8.

If the product of the absolute 6. The accurate interpretation of the results. Perform wind speed measurements at a distance building envelope, using a window, door, or vent opening. Seal three to five building heights away from the buildings, where or tape openings to avoid leakage at these points.

After the fan 8. It is s interval should be used. A good location avoids exterior 9. Data Analysis and Calculations corners and complex architectural features and should be close to the middle of the exterior wall. In addition, buildings more 9. The pressures from each location should be averaged, converted using information obtained from the manufacturer typically using a manifold. Average the pressures over at least for the change in calibration with these parameters.

These zero flow envelope pressures are measured temperature and barometric pressure, due to elevation changes before and after the flow measurements. These zero flow only, of the outside air for depressurization tests or of the inside pressures are to be subtracted from the envelope pressures air for pressurization tests see Appendix X1. To convert the measured during pressurization and depressurization. H2O depending on the where: capacity of the air-handling equipment.

In such pressurization, use the following equation: cases, substitute a partial range encompassing at least five data points. NOTE 2—It is advisable to check that the condition of the building 9. Subtract the average sealed openings have not become unsealed or that doors, windows, or from the measured envelope pressures at such pressure station dampers have not been forced open by the induced pressure.

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