WebbDuct leakage shall not exceed SMACNA Leakage Class 3. Duct specified as seal welded shall demonstrate zero leakage. Reseal and retest as required to achieve the specified leakage class. Duct shall also pass an audible and touch test (2” from duct), conducted by the owner’s representative, regardless of pressure class. Webband can be used to meet SMACNA Class 3 leakage standards for -2” WG to +10” WG. EASTERN TIGHT ROUND SPIRAL DUCT AND FITTINGS CONSTRUCTION STANDARDS Gauge selection for galvanized steel (ASTM A653) or paint grip. Fittings are assembled with stitch welds, spot welds, or standing seams and are sealed. All galvanized spiral …
HVAC Air Duct Leakage Test Manual - Sheet Metal and Air …
WebbSeal Class C – Applicable Static Pressure Construction Class 2 inch wg In addition to above, any variable air volume system duct of 1 inch and ½ inch wg construction class … WebbThe SMACNA air duct leakage test manual is the current standard for determining leakage rates. The lower the leakage class, the better the performance. Today’s commercial HVAC equipment manufacturers publish SMACNA leakage rates between SMACNA 6 and SMACNA 15. High quality custom-built units may achieve SMACNA class 3 in some cases. get the sink in
HVAC Duct Air Leakage 9-12-19 - old.smacna.org
Webb1.Seal or Sealing: Use of liquid or mastic sealant, with or without compatible tape overlay, or gasketing of flanged joints, to keep air leakage at duct joints, seams and connections … WebbHVAC Air Duct Leakage Test Manual. Store Home Subscriptions Browse by Topic & Type My Bookshelf. Webbsealed (same as SMACNA Seal Class A) and “Leakage classes … are averages based on tests conducted by AISI/SMACNA9, ASHRAE/SMACNA/TIMA10, and Swim & Griggs11.” … christophe biotteau