rec.photo.darkroom Discussion: Re: Ventilate or Scrub

rec.photo.darkroom Discussion: Re: Ventilate or Scrub

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From: Dan Quinn (dan.c.quinn_at_email.domain.hidden)
Date: Thu Feb 19 2004 - 19:22:07 EST

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RE: "Jim Phelps" <Jim.Phelps_at_MI.com> wrote

> "Dan Quinn"wrote
> > With all the talk of darkroom ventilation, air scrubbers came to mind.
> > I've been reminded of those who turn on the shower to clear the air.
> > At www.safelab.com click on, technical resources. Dan
>
> Just a thought, In the type of system you envision with the scrubber,
> you would also need to control humidity. The size of this system just
> got larger by a whole bunch...

  The fume hood unit described at Safelab has all the bells and
whistles. I suppose it may exhaust indoor or outdoor. Water flows down
and air moves up.
  Just off-hand I'd think a unit a foot square and three feet tall
might do for an eight hundred square foot darkroom. An air velocity of
one foot per/second is less than one mile/hour. That air velocity will
provide sixty cubic feet/minute of scrubbed and humidified air.
  A recirculating pump with filter plus a low rpm fan would be required.
A sump heater would help bring up the humidity. There would be some
maintanence required. Dan

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