www.hvactechgroup.com - forums

Lennox was selling these for $45.95.

Soon the only tool we'll need will be a smart phone!

http://www.airflowbalancing.com/abm.html

Looks cool.where would you find the most application though
I guess not a bad deal for that price.

I use the CFM airflow meter in new construction to balance the system.  It's much quicker to use than the more expensive instruments.  It seems to be quiet accurate as well.

I attached a picture of some other smart phone instruments.

i used it and it works awesome!