k-factor for VAV boxes

[enque21jan09]

can anyone help me how to find out / calculate k-factor for VAV boxes (Variable Air Volume)... wat parameters are required to calculate this k-factor....

[Brian_UK]

The manufacturer should provide those figures for their boxes.

Example here...
http://www.krueger-hvac.com/lit/pdf/airflow_measure.pdf

They can however be measured on site by your commissioning engineer.

Lot of information on Google under
"VAV box K factor"