A temporary duct cover for use in an HVAC installation processes. The temporary duct cover having a filtration portion and a closure member. The filtration portion being made from material which is air and water permeable. The closure member being configured to conform a duct. The temporary duct cover minimizes particulate infiltration to the duct while allowing moisture to escape from the duct, thereby inhibiting mold or mildew from forming in the duct.
