How to find area for circular duct and how to convert it into rectangular duct?

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أفضل جواب: Using a fire damper is NOT related to the type of the duct it is related to the smoke control management ... الإطلاع على المزيد

أفضل جواب: - Prefer to make at night after sunset, if not you have to close both ends. - Prepare a good movable ligh ... الإطلاع على المزيد