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  1. #1
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    Ventilation Using Ceiling Fans

    Greeting,

    I am working on a project that I was asked to design the ventilation just using ceiling fans. The application is storage building. I can design the number of the fans based on the required cfm but I am wondering how we need to provide vents for exhaust air and window for fresh air. Do you guys have any experience with similar project?

  2. #2
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    Quote Originally Posted by HVACMAN20 View Post
    Greeting,

    I am working on a project that I was asked to design the ventilation just using ceiling fans. The application is storage building. I can design the number of the fans based on the required cfm but I am wondering how we need to provide vents for exhaust air and window for fresh air. Do you guys have any experience with similar project?
    Location, heating, and cooling? How much ventilation or circulation?
    Looking forward.
    Regards Teddy Bear
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

  3. #3
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    It is located in southeast TX. I am providing 32000 cfm ventilation using three ceiling fans. No cooling or heating requirement just ventilation.

  4. #4
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    Does the design just want to move existing air around?
    Or has the owner/designer not considered this?
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  5. #5
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    You could put a window fan or fans at one end of the building and exhaust fans at the other which will give you ventilation.
    With vents nothing will bring in fresh air unless it gets windy outside. Ceiling fans will indeed move the air around as said but that is not ventilation.
    If you can't fix it with JB Weld, Duct Tape, and Ty Wire it has to be replaced.
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  6. #6
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    Quote Originally Posted by hvacker View Post
    Does the design just want to move existing air around?
    Or has the owner/designer not considered this?
    The intention of these fans is to more than moving air around. The expectation is to do also air change. That is why I am asking to see if any one has done similar job.

  7. #7
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    So you recommend to have additional fan(s) to push the air out. You are saying me to install fan(s) with 32000 cfm for ventilation? Therefore, what these big ass fans do would be moving air around, am I right?

  8. #8
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    Quote Originally Posted by desert guy View Post
    You could put a window fan or fans at one end of the building and exhaust fans at the other which will give you ventilation.
    With vents nothing will bring in fresh air unless it gets windy outside. Ceiling fans will indeed move the air around as said but that is not ventilation.
    So you recommend to have additional fan(s) to push the air out. You are saying me to install fan(s) with 32000 cfm for ventilation? Therefore, what these big ass fans do would be moving air around, am I right?

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  10. #9
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    Unless the ceiling fan is "ducted " the only air change you will get will be natural ventilation which will vary with indoor and out door conditions, wind speed outside ETC...A ceiling fan in itself will not create an air change

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  12. #10
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    Quote Originally Posted by lkapigian View Post
    Unless the ceiling fan is "ducted " the only air change you will get will be natural ventilation which will vary with indoor and out door conditions, wind speed outside ETC...A ceiling fan in itself will not create an air change
    Thanks. Do you have sample of ducted ceiling fans?

  13. #11
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    Quote Originally Posted by HVACMAN20 View Post
    Thanks. Do you have sample of ducted ceiling fans?
    There are none, it was an analogy...there are however plenty of fans, prop, forward curve , backward incline etc that will fit your bill. Start with your target ventilation needs/requirements

  14. #12
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    Quote Originally Posted by lkapigian View Post
    There are none, it was an analogy...there are however plenty of fans, prop, forward curve , backward incline etc that will fit your bill. Start with your target ventilation needs/requirements
    Lol. Sure, Thanks.

  15. #13
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    There is no such thing as ventilation using only ceiling fans. Ventilation by nature is exchanging the air within the space.
    What's the engineer call for building air exchange?
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