Retrotec USACE User Manual
Page 317
Appendix F F23
4
Perform a Multipoint Pressurization Door Fan Test (cont.)
Bias Pressure
Test Points
1
2
3
4
5
6
7
8
9
10
11
12
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
4.9
Calculate the Average Bias Pressure for all 24 Test Points taken in step 4.
Pa
4.10
Subtract value in 4.9 from all pressure readings taken in 4.6. This is the total corrected building pressure used
in the analysis. See step 6.
5
Perform a Multipoint Depressurization Door Fan Test
Testing in both directions is the preferred method, but if in section 4.6 if it was noted that the test was to be
performed in only one direction, then step 5 can be omitted.
5.1
Record indoor and outdoor temperatures before and
after the test.
Indoor Pre-Test
Indoor Post-Test
Outdoor Pre-Test:
Outdoor Post-Test:
5.2
Record wind speed and direction
Average mph
Direction
5.3
Record elevation of building above sea level.
ft.
5.4
Record 12 Bias Pressure Test Points where each test point consists of at least 10 readings taken over
the time period determined in step 4.5. Show positive and negative signs.
Bias Pressure
Test Points
1
2
3
4
5
6
7
8
9
10
11
12
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
5.4.1
Record the magnitude of the greatest Bias Pressure Test Point.
Pa
5.4.2
Record the amount of time taken to collect each Bias Pressure Test Point.
___sec
Depressurization test. A pressurization test must already have been performed. Take depressurization test points at
the same absolute values of Building Pressure as used in section 4.
5.5
Record the actual Building Pressures (Pa) from one or more interior pressure monitoring station and a
minimum of four exterior pressure stations, averaged or manifolded, with corresponding Flows (CFM) for
each fan.
5.5.1
Attach to this test form the results of the pressure and fl ow readings taken during the test. Results should
be provided in tabular and graphical form. Graph should include correlation coeffi cient (r
2
) and plotted in
log-linearized fashion. A minimum of 12 points must be provided, but the testing agency is allowed to take
additional data points to assist in data analysis and increase the accuracy of the test. There is no limit to
the number of data points taken during the test, but a minimum of 12 must be used for data analysis and
results.