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Update your SMACNA standards with the 2005 version of the HVAC Duct Construction Standards: Metal and Flexible!
New construction standards contain re-rated rectangular, round, oval and flexible duct constructions for positive or negative pressures up to 10 inches water gage (2500 Pa). Widths go to 120" in gages 26 to 16. Diameters go to 84" in gages 28 to 16. New performance requirements facilitate equivalent ratings for non-illustrated construction. The data in SMACNA - HVAC Duct Construction Standards: Metal & Flexible has been reorganized for easy use and reference; includes metrics. Other revisions occur in duct liner, hangers, fittings, vanes, dampers, tie rods and tests. Lead shielding has been added. Seal classes, casings, louvers, rooftop vents, sheet gage tolerances and accessories are retained.
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