[Greenbuilding] Measuring DesiccantHumidity

[conservation architect]

Andrew Golkin writes,"

http://www.jondon.com/extech-rh390-thermo-hygrometer.html

That's a reasonable unit that we use with our desiccant dehumidifiers.  If
you need Grains Per Pound  then the RH490 is the way to go. "

Thanks for recommendation.  My order is being processed.

Andrew Golkin also writes,"Just make sure you size it right with a 
professional otherwise you could start seeing
cracking in the drywall/trim joints and any wood floors could also show
issues."

I am attempting to measure the conditions and respond to that.  When I see 
the relative humidity drop to the target number as indicated by my weather 
sensor, I will remove the desiccant.  This is not a sophisticated approach. 
I want to see and feel this happen.  If it does, I can consider more 
sophisticated systems such as using thermo syphon solar air heat collector 
to dry out desiccant and direct air flows instead of moving the desiccant.

I want to dry out house after summer night flushing.  I am not able to claim 
professional credentials, however, I am attempting to understand the 
dynamics.

Eli



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On Thu, Jun 6, 2013 at 10:14 PM, Bob klahn <Home-NRG at dnaco.net> wrote:

>  Eli,
>
> There is a company in Xenia, OH which has been specializing in dessicants
> for 60 years.
> W.A. HAMMOND DRIERITE CO. LTD. P.O. Box 460 *Xenia*, *OH* 45385. Phone 
> (937)
> 376-2927
>
> I'm sure there are more elegant methods of measuring dessicant humidity
> but they make a paper card with humidity sensitive color change patches, 
> to
> tell when the dessicant is saturated and it is time to dry it out for 
> reuse.
>
> I'm sure that they could provide the technical information you are looking
> for.
>
> Bob Klahn
>