A shallow-profile foundation ventilator includes a body with at least one vent opening extending therethrough and covered by a screen. A skirt is connected to the body and extends perpendicularly from the body's back surface. Installation clips are attached to left and right portions of the skirt. An installation member at one end of the clip extends a short distance into the foundation opening and is biased against the opening by a resilient intermediate portion of the clip. In one embodiment, the ventilator includes a flat cover plate dimensioned to cover each vent opening. The cover plate defines a plurality of tear-drop openings disposed around the outer edge for receiving a plurality of attachment pegs extending generally normally from the back surface of the body. The tear-drop openings are disposed to engage the attachment pegs to secure the cover plate to the ventilator's back surface. In another embodiment, a cover member-defines at least one open portion and one closed portion, each open portion being configured to correspond to a vent opening in the body. Two oppositely disposed sliding edges of the cover member slide in a pair of tracks attached to the ventilator body. A knob attached to the cover member extends therefrom and through a control slot defined through the body whereby movement of the knob within the control slot varies the degree to which the cover member covers each vent opening.
