A fume hood is a type of local exhaust ventilation device that is designed to limit exposure to hazardous or toxic fumes, vapors or dusts. The device is an enclosure with a movable sash window on one side that traps and exhausts gases and particulates either out of the area or back into the room, and is most frequently used in laboratory settings.

Smoke testing refers to various classes of tests of systems, usually intended to determine whether they are ready for more robust testing. The expression probably was first used in plumbing in referring to tests for the detection of cracks, leaks or breaks in closed systems of pipes.