Most efficient conveyance of air Low pressure drop Less fan horsepower Lower operation costs Better .
Stainless steel ductwork may cost a little more than galvanized or aluminum but there are .
Black steel duct is made by the high thickness steel sheet then welding all 4 .
Duct Master Can Provide A Wide Range Of Air Out Lets Shapes And Designs Manufactured .
Duct Master Can provide All types of filters with wide range of efficiency levels also .
Galvanized mild steel is the standard and most common material used in fabricating duct work because the .