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DigitalNomad
Neophyte


Registered: 08/03/07
Posts: 158
Last seen: 12 years, 9 months
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2 coolmists versus ultrasonic and coolmist?
#7780772 - 12/20/07 08:43 AM (16 years, 1 month ago) |
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So, I have a greenhouse that is being recommissioned for this noble endeavour. Unfortunately, I have looked everywhere in my city and I just can't seem to find an ultrasonic humidifier that isn't at least $150. On the other hand, there are tons are relatively cheap coolmists lying around. Last time I used this set up, I had a coolmist and a wick setup(yes, I know, wicks are bad) and it did a decent job of keeping the humidity up, but not an amazing one. So, I was wondering, rather than having the ultrasonic and a coolmist, how about just two coolmists, maybe one inside, and one piped in? That way I get FAE as well.
Any thoughts?
-------------------- Here's to the first step...
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CantiSama


Registered: 10/21/04
Posts: 794
Last seen: 4 months, 10 days
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Re: 2 coolmists versus ultrasonic and coolmist? [Re: DigitalNomad]
#7780813 - 12/20/07 08:55 AM (16 years, 1 month ago) |
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a single coolmist should be good enough by itself, remember that you don't need 100% rH when using cased bulk/semi-bulk substrates
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Tiger got to hunt, bird got to fly; Man got to sit and wonder 'why, why, why?' Tiger got to sleep, bird got to land; Man got to tell himself he understand.
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DigitalNomad
Neophyte


Registered: 08/03/07
Posts: 158
Last seen: 12 years, 9 months
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Re: 2 coolmists versus ultrasonic and coolmist? [Re: CantiSama]
#7780819 - 12/20/07 08:56 AM (16 years, 1 month ago) |
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It's just cased rye, from magash's rye tek.
-------------------- Here's to the first step...
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CantiSama


Registered: 10/21/04
Posts: 794
Last seen: 4 months, 10 days
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Re: 2 coolmists versus ultrasonic and coolmist? [Re: DigitalNomad]
#7780829 - 12/20/07 08:58 AM (16 years, 1 month ago) |
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casings don't require 100% rH.
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Tiger got to hunt, bird got to fly; Man got to sit and wonder 'why, why, why?' Tiger got to sleep, bird got to land; Man got to tell himself he understand.
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legallyhomeless
mooch


Registered: 07/01/05
Posts: 4,051
Loc: EZRA for the Refuge
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Re: 2 coolmists versus ultrasonic and coolmist? [Re: CantiSama]
#7788191 - 12/22/07 07:48 AM (16 years, 1 month ago) |
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a coolmist is used for FAE and a ultrasonic for rH
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weretheshit
FeelingRhizomorp<wbr><wbr>hic?


Registered: 10/30/07
Posts: 389
Last seen: 14 years, 7 months
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Re: 2 coolmists versus ultrasonic and coolmist? [Re: legallyhomeless]
#7788307 - 12/22/07 09:03 AM (16 years, 1 month ago) |
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Quote:
legallyhomeless said: a coolmist is used for FAE and a ultrasonic for rH
This is true in some regards.
A coolmist in a sub-tropical location will be sufficient for an entire greenhouse, and may even raise rH too high. In this case, no ultrasonic is needed.
A coolmist in the desert probably wont even raise your rH above 70%, in which case you will definitely need an ultrasonic.
However, the coolmist inside your greenhouse will be humidifying air that has already passed through your other coolmist, and will likely raise your rH to the desired percent unless you live in an extreemly dry area.
A downside to this however is that this second coolmist isn't producing any extra FAE and is mixing all the air inside your greenhouse.
Normally when your hoses enter from the top of your GH all the CO2 will automatically be expunged from the holes in the bottom of your GH. Now, the coolmist on the bottom is mixing that CO2 back into the air and the air that is expunged from those lower holes has a lower concentration of CO2. In turn, causing all processes inside the GH to be a little slower.
This may not be a drastic difference, and you should experiment to find what works best for you
~ weretheshit.com
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