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OfflinepipeDream
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Registered: 02/08/06
Posts: 67
Last seen: 17 years, 10 months
Re: martha setup w/ ultrasonic and fan [Re: tokey666]
    #5325171 - 02/21/06 06:24 PM (17 years, 11 months ago)

oh you mean so it sucks the air through the martha instead of blowing the air through. Alright ya thats a pretty good idea. Keeps it from getting gusty through the set up. What do you think, something like this should work right?


--------------------
What is wrong with our culture is that it offers us an inaccurate conception of the self. It depicts the personal self as existing in competition with and in opposition to nature. We fail to realise that if we destroy our environment, we are destroying what is in fact our larger self. (Freya Matthew)


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Offlinetokey666
Let's Build It Instead
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Registered: 08/05/05
Posts: 666 666 Posts!
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Re: martha setup w/ ultrasonic and fan [Re: pipeDream]
    #5325369 - 02/21/06 06:59 PM (17 years, 11 months ago)

I think that would work EXCELLENT. That's my opinion though. Nobody else seems to want to chime in. :smile:

But yes, because of backpressure and how negative pressure works, pulling air is ALWAYS better for the fans then pushing it. Look at computer cases. Some have just the fans that blow air out the back, and some that blow air out the back AND push it in (which is called positive pressure). Either way, there is never a case that blows air INTO into without a fan to blow out.

With that said, keep in mind that you don't want to bring TOO MUCH air in at once.  This will cause increased transpiration of your casings, causing them to dry out VERY quickly, despite the amount of humidity in the martha.

With my setup, I run 1 fan (about 35 cfm) for 6 minutes every 4 hours in my tub. Now my casings are drying out. And I watch my humidity drop down to 75 percent (from 95+)in a matter of those 6 minutes.

You are going to have the same problem, but on a larger scale if you get fans with too much ooooomph. You want to SLOWLY draw the air through without bringing humidity down.


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Offlinefresh313
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Registered: 09/01/03
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Re: martha setup w/ ultrasonic and fan [Re: tokey666]
    #5325713 - 02/21/06 08:03 PM (17 years, 11 months ago)

co2 settles at the bottom, u want fresh air to come in from the top, to push the co2 which is settling at the bottom out


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Offlinefresh313
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Re: martha setup w/ ultrasonic and fan [Re: fresh313]
    #5325715 - 02/21/06 08:04 PM (17 years, 11 months ago)

i think yall just want more pictures  :captain:


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Offlinetokey666
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Re: martha setup w/ ultrasonic and fan [Re: fresh313]
    #5325985 - 02/21/06 08:56 PM (17 years, 11 months ago)

Well true it does settle at the bottom. But we are talking about an entire air flush exchange in the matter of 5-15 minutes. I seriously don't think the shroomies will mind a tad bit higher of PPM co2 flying by them.


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Offlinefresh313
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Last seen: 12 years, 9 months
Re: martha setup w/ ultrasonic and fan [Re: tokey666]
    #5326165 - 02/21/06 09:42 PM (17 years, 11 months ago)

http://xs69.xs.to/pics/06083/marthafairwrongway.jpg
i think thats what yall are describing, whats wrong with that picture


Edited by fresh313 (02/21/06 09:49 PM)


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Offlinetokey666
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Re: martha setup w/ ultrasonic and fan [Re: fresh313]
    #5327379 - 02/22/06 08:40 AM (17 years, 11 months ago)

I really don't understand either one of those diagrams, but from what it looks like, you are venting in the coolmist at the top below the fans. NO.

You vent the humidifier through the bottom of the chamber so that the fans can suck the humidity up. But ACTUALLY, if you want to do it correctly. There should be about three outlets into the chamber for the humidity. One high, one medium, and one tall.

But then again, you are also forgetting about the complete air exchange in a short period of time. NO HUMIDIFIER is going to be able to keep up with that, no matter where it is vented in, top, or bottom.


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