My house does not have an attic but it has an attic vent. one day i saw light coming from my room and when i came into my room i heard the closet from downstairs close and so i opened the closet with a baseball bat and found a little hatch in the celing in the closet and i saw it move and close i tried pushing up on it but it would not open so I tried an hour later and it opened and the same time i heard my front door open and close.