This is the most popular type of fume hood used in laboratory. It is generally placed on bench top, platform, frame or above cabinets. Bench mounted fume hood is also called as bench-top fume hood. It is available in various length. Fume hoods 5 feet & 6 feet length are widely used in laboratory. However, it is available in length of 7 feet, 8 feet and 10 feet also as per the need. Dimensions of fume hood represent the overall size (outer dimensions) of fume hood. Inside dimensions may vary manufacture to manufacturer. Bench top fume hood may have various type of openings at the front fascia like vertical, horizontal or combination of both.