My understanding is that this is a major type problem whenever the outside RH is greatly different then inside RH. One standard way of dealing with this from a building point of view... is to keep the inside humidity dry. Keep drying things out and you dont get fungi problems, rot, or other such related issues. Problem is that its not quite as simple as that. If you have lots of computers or electronics in a building for example... overly dry air creates a big problem relating to static electricity. Overly dry air is not particularily good for skin, lungs, eyes etc. Generally speaking...keeping RH at a minumum of 33 - 35 and at a maximum of 65 - 70 is very doable without sacrificing building concerns. One can aslo use temperature variations to some degree to assist effort. Thats sort of why I asked the question the other day... just how stable a room environment is neccessary to surpass and optimally configured DC system in effectivity. Cheers RicB Clyde Hollinger wrote: > Friends, > > Whole house (or whole room) humidification to 42% would be best for the piano, > but it is my understanding is that it can cause serious damage to the house > with unseen condensation in the walls. Where the weather gets colder, the > danger is greater, so this may not be a concern where it is both hot and dry. > Personally, I would do some serious research into this possibility before > running the risk of serious lawsuits 10-20 years down the line for having > recommended this approach. > > I didn't read all the posts on this subject, so if someone already mentioned > this please forgive me. And if I'm wrong, I would like to know that, too. > > Regards, > Clyde Hollinger, RPT > -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html
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