Performance testing guru Corbett Lunsford shows you how to find the grille Kfactor for every supply register in the house, by using a CFM measuring device like a passive flow hood on just one. Learn to use a $500 large vane anemometer to the fullest by pairing it with a bigger, more expensive instrument selectively.
Tools shown are Testo 417 large vane anemometer and TSI residential flow hood.