Gage-It Right The thinnest acceptable sheet metal for ductwork used in a single dwelling is 28 gage or 0.013 and 0.018 inches for galvanized and aluminum, respectively. This measurement is for around duct smaller than 12 inches in diameter and a rectangular section no bigger than 8 inches.
How thick are HVAC ducts?
Duct insulation ranges in thickness from 1 to 2 ½ inches and provide an R-value of about R-4.0 per inch of thickness.
Which is thicker 26 gauge or 30 gauge?
In other words, a 24 gauge sheet of galvanized steel is actually thicker than a 26 gauge sheet of galvanized steel. ... And even though uncoated steel and galvanized steel are both measured by the MSG, 30 gauge galvanized steel is defined as thicker than 30 gauge uncoated steel.Jul 21, 2016
What is the minimum gauge duct used in commercial ductwork?
Gage-It Right The thinnest acceptable sheet metal for ductwork used in a single dwelling is 28 gage or 0.013 and 0.018 inches for galvanized and aluminum, respectively. This measurement is for around duct smaller than 12 inches in diameter and a rectangular section no bigger than 8 inches.
What gauge is HVAC plenum?
It can be spiral, seamless, or snap lock. We recommend using sheet metal thickness that is 26 gauge (0.45 mm). The minimum is 28 gauge (0.38 mm) in order to cut the holes for the branch ducts without collapsing the plenum when drilling. Sealing.