Refer to sheet AC2. and the duct material chart. This is a low velocity unit with a static pressure of 1″ W.C. What gage galvanized steel is the minimum requirement for the 12` section with supply register that prov ides 1020 CFM?

Refer to sheet AC2. and the duct material chart. This is a low velocity unit with a static pressure of 1″ W.C. What gage galvanized steel is the minimum requirement for the 12` section with supply register that prov ides 1020 CFM?