The need for adequate ventilation in darkroom work areas can not be overstated. Especially with some of today's color chemistry, which, if used in an improperly ventilated space, can become harmful to the health of people in that space.
Premier's "Air-No-Lite", 100% Light Tight, Darkroom Exhaust Fans and Louvers insure healthy ventilation quietly, efficiently and effectively.
These louvers are designed to be installed in darkrooms to ensure a fresh, circulating air supply in tandem with item #11212 Premier 12x12 Darkroom Fan (A-1212). If there is no fresh air supply, the exhaust fan is working against a vacuum and is not effective.
There is one louver unit per box.