thx for the kind remarks. but trained and experienced are two different things. i took NCI class to better understand airflow issues, not to go and balace commercially...
as with most things, the more i learn the dumber i get......as in i really learn how much i dont know.
since my last post i went and measured air flow again on high speed and med low. tesp/blower curve= 950 cfm est( off chart, hi tesp) and 650 cfm.
return drop traverse with testo 416 on high and med low however= 1150 cfm and 960 cfm respectfully.... hmmm.
also checked face velocity at most supply registers, again very little change.
whiskey tango foxtrot