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  1. #1
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    Best separation distance between evaporator and walk-in wall



    Good evening to everyone.
    I`ve been trying to find a rule of thumb in regards to the correct separation (distance) between the return side of a forced air type evaporator and the walk-in wall, in order to achieve an efficient airflow. So far I have not been able to find it, but someone told me that it should be about half of the evaporator total width. Does this rule make any sense to you ? I have an evaporator which is about 3.65 meters wide, which makes about 1.80 meters the recommended distance. Isn`t it too much ?Thank you for your response.



  2. #2
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    Re: Best separation distance between evaporator and walk-in wall

    I'm not going to hold you to the nearest millimetre though the method i use is dependant on the room size and load.
    I never place evaporator inside the room entrance. Too much warm air sucked in and cold air forced out. Also causes a loss in capacity with premature ice build up.
    Have enough space between a side or far wall so one can get in to clean the evaporator of either ice, or debris build up without having to be a contortionist!

    Short answer: 500 mm
    Depends on whether or not this is a chiller or freezer room with high, or low velocity air flow.
    Distance from wall to evaporator is important so as not to have the evaporator short cycling air under normal, and restricted air flows.
    To the optimist, the glass is half full. To the pessimist, the glass is half empty.

  3. #3
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    Re: Best separation distance between evaporator and walk-in wall

    mmm to beer or not to beer...........lets drink breakfast

  4. #4
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    Re: Best separation distance between evaporator and walk-in wall

    Good evening and thank you for your responses. Apparently, 1.80 meters is too much. The proper distance should be between 300mm (as indicated in the brochure included by lowcool) and 500mm as recommended by mikeref. Good enough for me.

  5. #5
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    Re: Best separation distance between evaporator and walk-in wall

    Lowcool, couldn't view that page. I'll try again later

    coldseeker2012, Cheers.
    To the optimist, the glass is half full. To the pessimist, the glass is half empty.

  6. #6
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    Re: Best separation distance between evaporator and walk-in wall

    We use same distance as height
    It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.

  7. #7
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    Sep 2011
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    Re: Best separation distance between evaporator and walk-in wall

    I have always used the depth of the coil multiplied by 1.5. So if you have a 12 inch deep coil place it 18 inches from the wall.

  8. #8
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    Re: Best separation distance between evaporator and walk-in wall

    I've always worked on the evaporator fan diameter.
    If it's an 800mm diameter fan, then 800-1000mm from the wall works for me.
    Cheers.

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