1. Reference ASTM E3158-18 for Whole Building Air Leakage Testing.
2. Record interior and exterior weather conditions.
3. Record average wind speeds.
4. Record interior and exterior temperatures before the testing begins.
5. Record site elevation in feet above sea level.
6. Measure bias pressures with fans off and covered.
7. Perform a multi-point pressurization test from at least +25 to +50 Pa (leakage is reported at 75 Pa, as attained or extrapolated).
8. Record a minimum of 5 points between minimum and maximum induced pressures.
9. Measure bias pressures at end of multi-point test with fans off and covered.
10. Record interior and exterior temperatures.
11. If the pressure exponent n is less than 0.45 or greater than 1.0 per Section 9.5.1 of ASTM E3158-18, then the pressurization test is invalid and shall be repeated.
1. Reverse direction of fans.
2. Measure bias pressures with fans off and covered.
3. Perform a multi-point depressurization test from at least -25 to -50 Pa (optional).
4. Record a minimum of 5 points between minimum and maximum induced pressures.
5. Measure bias pressures at end of multi-point test with fans off and covered.
6. Record interior and exterior temperatures after the testing is complete.
7. If the pressure exponent n is less than 0.45 or greater than 1.0 per Section 9.5.1 of ASTM 3158-18, then the depressurization test is invalid and shall be repeated.