Standard Manual N
Duct Calculations and layout for commercial buildings across the USA. They will typically be metal duct, either rectangular or round. Some states will allow Duct Board and flex but it is not common outside of the SE USA.
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Duct Calculations and layout for commercial buildings across the USA. They will typically be metal duct, either rectangular or round. Some states will allow Duct Board and flex but it is not common outside of the SE USA.
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