MCRP 12-10B.1, page 253

Figure B-10. TOW Fired From Inside a Room (b) To fire a Dragon from inside a room, the following safety precautions must be taken. The building must be of sturdy construction. The ceiling should be at least 7 feet high. The floor size should be at least 15 by 15 feet, or larger if possible. At least 20 square feet of ventilation should exist (room openings), preferably to the rear of the weapon. An open 7- by 3-foot door would provide minimum ventilation. All glass should be removed from windows, and small, loose objects should be removed from the room. The room should be clean or the floors must be wet to prevent dust and dirt (kicked up by the backblast) from obscuring the vision of other soldiers in the room. All personnel in the room must be forward of the rear of the weapon. All personnel in the room must wear ballistic eye protection and earplugs. At least a 6-inch clearance must exist between the launch tube and the aperture from which it is fired. Military Operations on Urbanized Terrain B - 21