In an attempt to be more clear on the subject service request, I would like to see if HAMMER can output time history results of mass flowrate of air ingress through a combination air & vacuum valve. If I can get mass flowrate of air ingress and the pressure and temperature of air are known, then I can figure out the air density and air velocity versus time, and get the maximum value of calculated air ingress velocity. I am NOT interested in knowing the sonic velocity. I am interested in knowing whether the computed air ingress velocity through an air valve might exceed the limit recommended by the air valve manufacturer. I have entered a non-zero "report period" within the data field for air valve properties. I do not see where air mass flowrate versus time is reported.