To fasten a duct hanger to a gypsum board wall, the best fastener would be an anchor shield.

Name: To fasten a duct hanger to a gypsum board wall, the best fastener would be an anchor shield.
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Quizplus · Accepted Answer

The best fastener for attaching a duct hanger to a gypsum board wall would typically be a toggle bolt or similar, as anchor shields are better suited for solid materials like concrete or masonry, not hollow or less dense materials like gypsum board.

To Fasten a Duct Hanger to a Gypsum Board Wall