"Steven L." wrote:



"mm" wrote in message
:

-snip-

I don't think either mold, mildew, or condensation is inevitable.

Well....

According to my calculations, when the temperature is 70 degrees
Fahrenheit and the outdoor dew point is zero degrees Fahrenheit, the
relative humidity is only 6% (!!!).

So even raising indoor humidity to 25% is quite a lot of additional
moisture--enough to cause condensation on any surfaces (like windows)
that are cooled by outside temp.


But that is indoors. My indoor RH is 33% - temp 64. Outside is 50%
at a balmy 30degrees right now. This weekend it will go to
12below, my indoor humidity will probably drop to 28 or so-- and there
won't be any condensation anywhere.

My windows are thermopane. Years ago when we had single pane, drafty
windows, there would be some condensation.

If you're getting condensation at 25% RH, then fix the windows.

Jim