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  1. #21

    Join Date
    Aug 2006
    Multi Format
    To be clear, I didn't mean to imply that 300 watts is enough heat.(Based on David's stated specs for his Versalab, 0.3 to 0.6 gal/min "should be satisfactory.") But it seems fairly easy to use a pair of them. Whereas if you only had 40 watt heaters, you'd need fifteen of them.
    Last edited by Mr Bill; 01-04-2014 at 11:28 PM. Click to view previous post history.

  2. #22
    MattKing's Avatar
    Join Date
    Apr 2005
    Delta, British Columbia, Canada
    Multi Format
    Is your air temperature appropriate (around 68F/20C)?

    If so, can you put in a largish tank and then let the air warm it to what you need, with maybe a little help from a downstream aquarium heater?

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  3. #23

    Join Date
    Jan 2005
    Downers Grove Illinois
    It is called a heat exchanger and works both ways although industrial ones are made for more efficient use and unidirectional

  4. #24

    Join Date
    Sep 2013
    Madisonville, LA
    Large Format
    Quote Originally Posted by David Brown View Post
    When we bought this house, it had 3 full baths and a powder room (still does, duh). Four chairs, no waiting. Since I am used to a dedicated darkroom, (and there is certainly room) and not working in a bath, I suggested gutting one of the baths and refitting it as the darkroom. My wife looked at me, well, you know ...

    Anyway, we have a detached garage/shop building that the prior owner had built to work on his cars - his hobby. In the large attic space above the shop, he had built a gym, and had partially finished out the space. I completed what he started and it is 12x18, fully insulated, heated and cooled, etc. But, no native plumbing. I ran a cold water line, and actually plumbed for a water heater, but then decided against installing one based on prior experience. It isn't needed in the darkroom in this climate except rarely, and so sits unused most of the time. It's just not good for them in the long run. Yes, one can turn them off and drain them, but then starting them up when they are needed is a job in itself, and it got to be a cost/benefit decision, admittedly subjective on my part.

    The same wife referenced above has told me to just get over it and install a heater, but what does she know?

    May not be needed in North Tejas, but here is South Luisiana which BTW is a whole lot warmer than N. Tejas, I have a dedicated 12 gal water heater for the darkroom. Water heaters are frigging cheap. A whole lot cheaper than an "industrial heat exchanger." If mine is unused, I have an "on/off" switch and I just turn it off. If sporadic use is bad for them, get a new one in 10 years when it craps out. You'll also be able to wash your hands with "warm" water for those 10 years during the winter in the darkroom and then be able to get off the computer and actually spend the time printing. That's what I did today, water was coming in at 62 Deg, and the "dedicated water heater" warmed it up to 70 through the control valve.

    I have a similar setup inside an RV garage that the previous owner used to store race cars. I ran off the well pump line and split to the water heater and then the chiller. I have the setup shown in the LLF Forum darkroom portraits around page 51-52, and here in the Darkroom Portraits II, and also under a thread for Intellifaucet Installation:


    If I may, I suggest that you listen to your wife. I do mine and it's made for a better marriage.

    Last edited by Luis-F-S; 01-05-2014 at 07:37 PM. Click to view previous post history.

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