Retrotec FanTestic (ATTMA) - Manual (Page 30)

rev-2014-10-27
Page 30 of 58
©Retrotec Inc. 2011-2014
4.4 Results for the Set
Each Test standard has specific requirements for calculating the results from the measured flow through
the fan required to reach the induced pressure points. The results of these calculations are shown for
each data set, and then all sets are combined into a separate summary.
There are common elements for every data set, discussed in this section. The flows (corrected as
required by the standard in use) are analyzed by FanTestic to create an ideal line on an Induced Pressure
versus Flow graph using all the measurements. The “Error” for each flow shows how far away that point
is from the ideal.
The flow coefficient, the flow coefficient, and the correlation all relate to the line created by FanTestic
based on the measurements in this Set.
Air leakage results for the Set
Click “Calculate” to force FanTestic to go through all the readings in the set and calculate the results.
Always click calculate before creating a report, to be sure that the latest information has been included.
“Average bias pressure, initial” and “…, final” are used to correct building gauge pressure readings and
are required in the report.
4.4.1.1 Total flow
This is the volumetric flow rate corrected for each building gauge pressure test point to correspond to
standard temperatures and pressures of 101.325 kPa, 20°C and 0% relative humidity.
4.4.1.2 Corrected flow
This is the volumetric flow rate that occurred through the envelope at the environmental conditions
present during the test.
4.4.1.3 Error
This is the 95% confidence limit for the results. It essentially means that 19 times out of 20 the results
will statistically fall within this error limit.