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  1. #11
    lee
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    I have a 30 gal tank I plumbed into the hot water side of my darkroom. Dont use is much this time of year but several months a year I do need to warm up the water. Mine is 220vac.

    lee\c

  2. #12

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    Quote Originally Posted by Loose Gravel
    ...won't turn on until there is a minimum flow
    of 1/2 gallon per minute.
    At what flow per minute does it turn off?
    I've shopped the electrics and find 1/2
    gallon turn on typical even of the
    small units.

    BTW do you know of the units with thermostat?
    Dial the temperature. Skip the cold water plumbing!
    The darkroom thermostat model will deliver +/- .5F
    at any temperature of usual interest. Dan

  3. #13
    Bob F.'s Avatar
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    I don't think wash water temp is terribly critical. Anything from around 20 to 25C will do fine. I use a 3kW instant heater which works well in London's climate (i.e. air temperature rarely outside the 5C to 25C range). A 6kW shower unit will work too as long as it has a reasonable thermostat and you can control the flow rate independently to the temperature, although that will need its own power line from the main fuse-box.

    Good luck with the build! Bob.

  4. #14
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    I think I will try a 19 gallon HWH. Keep you posted.
    Michael

  5. #15
    Loose Gravel's Avatar
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    Quote Originally Posted by dancqu
    At what flow per minute does it turn off?
    I've shopped the electrics and find 1/2
    gallon turn on typical even of the
    small units.

    BTW do you know of the units with thermostat?
    Dial the temperature. Skip the cold water plumbing!
    The darkroom thermostat model will deliver +/- .5F
    at any temperature of usual interest. Dan
    Dan, the one for my darkroom, guest room, laudry room is an Aquastar 38B. It turns ON at 1/2 gal/min and turns off below this amount. I have a thermostat model, a Takagi TK-1, for my house showers. It puts out 120F water from 1/2 gal/min to about 4 gal/min depending on the inlet temperature. It has some hysteresis between turn on/off, but I don't remember how much. Might have been 3/4 gal/min ON and 1/2 OFF.
    Watch for Loose Gravel

  6. #16
    MurrayMinchin's Avatar
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    Bump!

    There's been whisperings that our 12' x 25' garage may be re-born as a darkroom and a mat cutting/framing/print storage room this spring.

    I contacted this company (Stiebel Eltron) and they recommended this electric heater which turns on with just .29 gallons of water per minute;

    http://storesense2.megawebservers.co...etail.bok?no=8

    Anybody else have experience with these types of water heaters?
    _________________________________________
    Note to self: Turn your negatives into positives.

  7. #17
    Jim Jones's Avatar
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    First, determine just how much hot water you need. A print washer might require much; tray washing very little. If I ever get around to remodelling my darkroom, I have an under-counter heater for it. Input will be through a two stage water filter; nice for the darkroom but overkill for the rest of the house. A high volume print washer would require something else.

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