Monday, May 21, 2012

Installing a light-proof air vent


Latest RC print washing in darkroom sink. 
After using the darkroom a couple of times now, I've discovered the need for an air intake vent to replenish the air being removed by the exhaust fan.  Without an intake vent, the air in the darkroom stagnates and the temperature begins to rise to uncomfortable levels.  I have researched my options quite thoroughly and eventually settled on using the space between the two-by-fours in my wall as a baffle to keep the light from entering the darkroom.  Basically, for this method, all I need to do is: 1) find a gap between two studs in my darkroom wall, 2) install a register in the bottom end of the external side of the wall, and 3) install a register in the top end of the wall on the interior side of the wall (see photos below).  The distance between the two registers blocks out light from the outside, but still allows the air to flow into the darkroom.  After installing it last night I tested it briefly and found it to be very effective for keeping artificial light out of the darkroom, but I still need to test it against sunlight from the nearby window.  

External intake vent at base of external wall.
Internal intake vent at top the inside of same wall. 


















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