On Nov 8, 2008, at 6:09 PM, David Love wrote: > I meant that only as an example. If the climate varies enough to > warrant both systems then by all means install both systems. There > are environments, however, where both are not warranted. That was > my point Hi David, I wasn't disagreeing with you, as you were clear in talking about "constantly dry climate." I simply like to point out (with the general readership of the list in mind) that it is unwise to make assumptions based on "general perception of climate." Anyone who is installing Dampp-Chaser systems ought at least to have a reasonably accurate hygrometer and to make consistent use of it. Unless you measure RH, you don't know what it is. Some people go by weather statistics, which don't tell you much about what is happening inside the house. BTW, my own house, which is small and fairly tight, stays above 50% RH virtually year round, without any intervention on my part (I don't run any humidifiers). It's over 55% at home today, and at UNM it is 15%. Cooking, showers, houseplants all contribute. I've considered getting a dehumidifier so my windows won't sweat and mildew over the winter. This in a supposed desert. (Where, if I didn't irrigate, not much would be alive in my yard). I have a few customers with the same syndrome. Others get below 10% consistently in winter through spring. Interior RH varies a lot from house to house, and public building to public building, all in the same climate. Regards, Fred Sturm University of New Mexico fssturm at unm.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ptg.org/pipermail/caut_ptg.org/attachments/20081109/d0ecd26e/attachment-0001.html
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