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  1. #11

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    hi Kev - may i suggest that you don't actually need much in the way of venting if it is designed well. A cover elevated 20-30 inches over the trays with exhaust fan, expelling to the outside is good enough. The thing is, to have a vent located somewhere that will make the flow of air travel from the inwards vent, across the trays to the outwards vent. Putting the vent in the door is usually easiest.

    To get a little techy: the size (or area across) of the inwards air vent should be the same or larger than the size of the outwards air vent.

  2. #12

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    Thank you! I went with the fan at 12x12 and a vent 12x12 as well. Should I only need one then?

    I went with 2 of these
    Doran Air-No-Lite Intake Louver 12x12 but I can return one of use one for each side of the opening... Any ideas?

    And for the fan I went with this one form talking to others.

    Doran Air-No-Lite Exhaust Fan Pro-Lab SL/WC which is 12x12 as well and weather proof so hanging outside the building especially when it snows should be no problem.

    I am placing this fan at the bottom of the top plate of the framed wall. Which is about in the middle of where the sink will be. Then on the opposite wall I will place the other one. I am really concerned about the door leaking light though as I will have the enlarger to the left of the door. I bought an interior hollow core door these doors I am not sure how to weather strip them to block the light especially since they have no threshold to help block. I thought about exchanging for a exterior door but man I hate spending the money as those doors are about 4 times more expensive.

    Thanks again,

    Kev

    Thanks again,

    Kev

  3. #13

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    Unfortunately I'm not so familiar with the Doran excessories Kev. But I don't think you would go wrong.
    It shouldn't be too hard to stop it leaking light. Perhaps cut a snug fit, then rasp it out to just the right size to let the vent in (right side up of course!) All the best.
    John.

  4. #14
    Les McLean's Avatar
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    Kev,

    I live in the Cheviot Hills in the Borders of England and Scotland where the temperature drops as low as 0 too. My darkroom is 20ft x 10ft shed, totally insulated, walls, floor and roof, with 3" of fibre glass insulation and 1" insulation board. I also have a 180watt electric greenhouse heater running permanently during the winter months that keeps the temperature above freezing. When I work in the darkroom I have a 2 KW Convector heater running with the thermostat set to 24c. I've had no problems in 20 years, the temp is constant in the winter and the enlargers and electrical equipment have not suffered with humidity or dampness.
    "Digital circuits are made from analogue parts"
    Fourtune Cookie-Brooklyn May 2006

    Website: www.lesmcleanphotography.com

  5. #15

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    Thank you for the respnse. Also this building will dupe as a art studio as I have two room and I need to make sure it doesnt get damp as I will be also having computer, mat boad and canvas for oil painting.

    Hopefully the electric heaters will do the trick....

  6. #16
    MurrayMinchin's Avatar
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    Bump!

    Hi Kevin - I see it's been a couple years now since this thread and I was wondering, how are things are going heating and venting your darkroom? Did the oil filled electric heaters work during winter with the fan running?

    I'm a couple months from starting my own darkroom project and I'm finding the APUG advanced search function a gold mine of information

    Murray
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  7. #17

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    Hello Murray,

    Yes it did. The heaters worked excellent! Keeps everything at temp. I went with the Doran fan in the wall and it works awesome.

  8. #18
    MurrayMinchin's Avatar
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    That's great Kevin

    You have the same cold snaps as I do, so it's good to hear they worked. That's one more piece of the darkroom construction puzzle into place. Thanks!

    Murray
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  9. #19

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    Oh one thing is insulate the floor. hat has really helped me also and wrap the pipes. If I would have don tit again I would have used copper piping but i went with ABS I think that is what they call it.

  10. #20
    MurrayMinchin's Avatar
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    Good tips Kevin, thanks.

    Our 26x13 garage that's built onto our house is where the darkroom and matcutting/framing room are going. I'll have the luxury of putting the 'fresh air' vent into our downstairs hallway...that should give the heaters a bit of help when it's 0 degrees F, or in my case, -20C outside.

    I haven't even started thinking about how to insulate the floor yet...

    Murray
    Last edited by MurrayMinchin; 01-12-2007 at 09:45 PM. Click to view previous post history.
    _________________________________________
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