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  1. #11

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    This is my solution:



    The system is made by Helios and is made from these components.



    The system is *very* silent as the fan is capsuled and there is a noise silencer built in. It is nothing which you want to install yourself as there are some pitfalls which generate noise if not handled correctly. You'll need a louver with dust filter somewhere.
    Building a ventilation into a darkroom is easy. Building an efficient one which does not make noise is very difficult. Fans used in toilets are inapt as you stay in a darkroom for hours not for minutes.
    My vent transports 380m³/h at full speed. This is about 15x the volume of my darkroom. Usually I run it on step 1. It is practicallly noiseless then. On step 2 it is barely hearable. I can run it conveniently up to step 3. Step 4 and 5 I rarely use. On step5 it is appr. as noisy as our kitchen vent on step 1.

    Ulrich

  2. #12
    largeformat pat's Avatar
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    Ulrich,
    That is similar to what I propose to build. How do you introduce air into the darkroom?
    Pat
    What grain............................................. ...............
    Oh sorry, I forgot you don't shoot Large Format
    Large format Pat.

    http://www.largeformatpat.com

  3. #13

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    Quote Originally Posted by largeformat pat View Post
    Ulrich,
    That is similar to what I propose to build. How do you introduce air into the darkroom?
    Pat
    There is a large louver with a light trap in the door. It is made with a filter to keep dust out.

    Ulrich

  4. #14
    Henry Alive's Avatar
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    Dears Ulrich and Pan: Do you think that vent the entire sink long will be as efficient as a vent hood equally long?
    Henry.

  5. #15
    largeformat pat's Avatar
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    I feel a hood would require a fan just the same. A hood would take up more area. I propose to place the duct behind overhead cupboards. Also with duct I was going to place it closer to the tray area and get more fumes removed with the fan not having to work so hard. A hood will access a larger area.
    Pat
    What grain............................................. ...............
    Oh sorry, I forgot you don't shoot Large Format
    Large format Pat.

    http://www.largeformatpat.com

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