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Offlinefunguyi
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Can you have +90% without condensation
    #14032019 - 02/26/11 06:47 PM (12 years, 10 months ago)

Can you have +90% without condensation all over a green house? I have two cool mist in a 4 tier GH. One on top one on bottom and a large tray of damp perlite. I have one of those silver dryer exhaust pipes connected to the intake of one of the coolmist to bring in fresh air. It stays about 68 degrees and above 90%humidity. If the gauge i have can be trusted i just would have though i would see some serious condensation at that high humidity.

Does anyone have experience with the HTC-1 digital temp/hygro. I have been using mine and it seems to be working pretty well. I checked it with the salt tech and it read 73% humidity so pretty close. Can these be trusted?


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InvisibleDoc_T
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Re: Can you have +90% without condensation [Re: funguyi]
    #14032053 - 02/26/11 06:55 PM (12 years, 10 months ago)

If it's warmer outside the greenhouse, you'll never get condensation.


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Offlinefunguyi
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Re: Can you have +90% without condensation [Re: Doc_T]
    #14032069 - 02/26/11 06:58 PM (12 years, 10 months ago)

Thats what i needed to hear its about 72-74 outside the GH and 68 inside because im bringing in cool fresh air with the dryer vent hose.


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OfflineRogerRabbitM
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Re: Can you have +90% without condensation [Re: funguyi]
    #14032574 - 02/26/11 08:31 PM (12 years, 10 months ago)

Quote:

I checked it with the salt tech and it read 73% humidity so pretty close. Can these be trusted?




No.

Besides, the salt test is for mid 70% humidity.  Since hygrometers are only accurate over a small part of their scale, you should use the damp towel method, which is much more accurate at high humidity.

Condensation is related to a temperature differential, not humidity.
RR


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Re: Can you have +90% without condensation [Re: RogerRabbit]
    #14032705 - 02/26/11 09:02 PM (12 years, 10 months ago)

Salt test is a good indicator you got a decent room hygrometer, so that's a plus.


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