INJECTION MOLDED VEHICLE COMPARTMENT PRESSURE RELIEF VALVE

A pressure relief valve apparatus for a vehicle compartment includes (a) a housing having an injection molded frame for mounting in an aperture in a vehicle panel, the frame having at least one flow opening extending therethrough; and (b) at least one injection molded flap, each flap having a flap connection portion joined to the frame adjacent an upper edge of a respective flow opening. Each flap is pivotable between a closed position in which the respective flow opening is blocked by the flap, and an open position in which the respective flow opening is unblocked for permitting pressurized air to vent through the flow opening.