US Patent 10989437 Insect barriers for inlets and vents

A barrier device to prevent insects from entering an opening of a vent in fluid connection with an interior of a building includes a body which includes a housing. The housing includes a first end adapted to be placed in fluid connection with the vent opening and a second end. The barrier device further includes a mesh barrier positioned adjacent the second end, opposite the first end, through which fluid (gas and liquid) can pass. However, insects of a predetermined range of size cannot pass through the mesh barrier. The mesh barrier has an effective open area at least as large as an open area of the opening of the vent.