Solves leakage problems - a major concern in today's duct construction market. A companion to HVAC Duct Construction Standards - Metal and Flexible, this manual contains duct construction leakage classification, expected leakage rates for sealed and unsealed ductwork, duct leakage test procedures, recommendations on use of leakage testing, types of test apparatus and test set-up and sample leakage analysis. Also covered are orifice flow meter design and valuable references for fluid meter instrumentation. 8 1/2" x 11". 3-hole punched.