Originally Posted by
Drew Wiley
The secret is to pull air, not push it. If you get a big OUTDOOR wall-mounted Broan squirrel-cage from Grainger, it will isolate both noise and work far more efficiently than an indoor push fan. If you must do it indoors, an IN-LINE Panasonic squirrel-cage will cost you around $400 but also be quiet. Avoid rotary fans (noisy). I strongly recommend a high-quality unit which accepts a dedicated speed control (around another $40). Of course, you'll need light-tight air intake vents like Doran offers; forget their fans. Air should be pulled from behind across the sink toward a wall vent or suitable fume hood. Duct size and smoothness has to have matching efficiency, though configured to prevent light from entering via the exhaust fan. One good exhaust fan is better than a bunch of cheap ones. Air filters or purifiers won't do it by themselves, though they are nice for dust control in film-handling and enlarging areas.
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