Check out these fantastic tips on measuring airflow! This covers measuring with a vane, pitot tube, TESP, temp rise method, hot wire anemometer and more. Complete with videos and diagrams, it's all here.
Combustion Appliance Zone Testing (CAZ) Made Easy (March 24, 2016)
-Adapting to the new BPI standard
-RESNET testing requirements
-NFPA testing requirements
-Best practices for best results