About this asset

This parametric Revit family provides a circular weather rain cap hood for ductwork termination, featuring an adjustable metal design. The component is a functional circular weather cap designed for external duct termination. It features a conical top shield supported by vertical struts, positioned above a cylindrical base section that integrates with standard ductwork profiles. The geometry is clean and utilitarian, finished in a neutral grey tone indicative of galvanized steel or powder-coated metal. Its proportions are intentionally simple to ensure clear representation in both plan and elevation views within a technical model, providing a reliable visual for roof or exterior wall-mounted mechanical ventilation systems in architectural documentation.

The download is a 297 KB file containing a Revit family (.rfa). Load it into a project from the Insert tab with Load Family, then place it like any other component of its category; it schedules and tags with the rest of your model.

Users can load this RFA file directly into a Revit project as a generic model or mechanical equipment family. Once placed, the parametric nature of the component allows for adjustment of the base diameter to align with specific duct sizes. It is best practice to associate the family with a dedicated mechanical sub-category to maintain control over visibility and graphical overrides in project views, ensuring the termination point is correctly represented in both 3D and 2D documentation.

This rain cap is essential for mechanical engineers and architects detailing external ventilation systems on residential, commercial, or industrial buildings. It is typically deployed at the termination point of exhaust or intake ducts on roof structures or exterior facades. When coordinating services, professionals use this component to represent the physical footprint of the vent hood, ensuring clearance from other roof-mounted equipment, parapets, or building elements. It is a standard requirement for accurate MEP coordination and exterior building envelope detailing in Revit projects.