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  1.    #1  
    Keeping in the mod of "Off Topic" and getting away from the Bush Bashing Terror War talk I thought I would ask this question to the people who are wise enough to own Treo's
    I was wondering if you were to increase the pitch of your ceiling fan blades would'nt it make your ceiling fan much more effective? what would be the drawbacks?
    Most ceiling fans have five blades. Why? Would it be better to just have three with and extrem pitch. Or what about seven blades?
    Why do most ceiling fans have five blades.
    humm

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    Sorry about the typing errors; I'm all thumbs.
  2. #2  
    Increasing the pitch would make the fan move more air at low speeds, but it would take more electricity to do it; run the fan at higher speeds, and you might end up with vibration and noise problems if the blades "stall" (or, in hydraulic terms, "cavitate"). In an extreme case, each blade would "fly" in the turbulence of the blade ahead of it, and you would actually get less effective air circulation. And the motor would run quite a bit warmer.

    I have a three-bladed fan in my bedroom and a five-bladed fan in my dining room. In my former house, I had two four-bladed fans, one in the bedroom and one in the living room. The more blades a fan has, the easier it is to balance, and (in my own experience, anyway) a fan with more blades runs quieter for the same air movement.
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    #3  
    We have forced air heat, and no AC, so the windows are open a lot in the summer and we get a LOT of dust from the air. I've found that keeping the leading-edge of the fan blades clean makes a big difference in terms of noise and turbulence, both for ceiling fans and regular upright fans.
  4. #4  
    Another factor to look at is that some fans are not capable of handling the load of a higher pitcher or more blades, et cetera. Ben
  5. #5  
    On the same note.... sorta, whats the common thought as to the direction and time of year?

    Clockwise for what temperature?
    Counterclockwise for what?
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  6. #6  
    Quote Originally Posted by Hdhntr23 View Post
    On the same note.... sorta, whats the common thought as to the direction and time of year?

    Clockwise for what temperature?
    Counterclockwise for what?
    In winter, I generally have the rotation such that the air is sent down, with the hopes of bringing the warmer air down into circulation.
  7. #7  
    Quote Originally Posted by shopharim View Post
    In winter, I generally have the rotation such that the air is sent down, with the hopes of bringing the warmer air down into circulation.
    That's what I used to think, but Bob Vila advises otherwise.
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  8. #8  
    cool "down"
    heat "up"

    If I want to cool a room down then air down and visa vera.
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  9. #9  
    Quote Originally Posted by Bill Gamble View Post
    That's what I used to think, but Bob Vila advises otherwise.
    He should know. Thanks for the heads-up

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