During HERS calculations and rating registrations error messages sometimes display indicating "n" or "R" are out of range. This provides a description of the values and possible causes of the values out of range.
MULTI-POINT INPUTS IN ENERGYGAUGE
OUT OF RANGE INDICATES
air flow coefficient
air flow exponent
This could indicate there was a large hole or opening such as a window, door or attic hatch open during testing. According to ASTM E0779-10, a value less than 0.5 or greater than 1.0 indicates the test is invalid and requires the test to be repeated.
data quality factor
Results less than 0.97 indicate the data points do not fall on the curve. This could indicate testing was performed under windy conditions, may have entered incorrect multi-point values or took the readings without the meter "catching up" with the data point.