I put in brand new low-e argon windows. The windows all face south and I
live in a cold climate (Toronto).
Right now there are pathes of fog in most of the window. It seems to get
worse when the sun hits and it is really cold. Unfortunately we have not
had these over the spring and summer so I can't say if it will go away or
not. It started with one window and then another and another and so forth.
Once a window gets it, it has not gone away with changes in weather.
The window manufacture told me this was normal.
Can anyone confirm?
It depends on where the humidity is. If it's condensation between the
panes, the windows are defective. If it's condensation on the inside,
that can happen depending on how humid it is inside and how cold it is
outside. Even with the best insulated windows, the inside surface can
get cold enough to cause condensation. Do you have a humidifier and
is it set too high?
On Wed, 1 Mar 2006 17:47:12 -0500, "Alan Whitehouse"
Condensation *ON* the windows in normal and not a problem.
Condensation *IN* the windows is a sign of seal-failure.
You need to be very clear about which thing is happening.
The "It has not gone away with changes in weather" implies
that you can't wipe it off, right?
If it is in-between the glass then it is NOT normal. It is a defect and
should be covered under warranty.
If it is on the glass, then it is a simple physics question. The glass
is lower than the dew point. The dew point is not the same measurement as
humidity, but they are related. The dew point does not change with
temperature it is a measure of the total amount of water. The humidity is a
measure of the amount of water divided by the total amount possible. The
humidity is 100% when the current temperatures equals the dew point or less.
Now what to do. You can wipe it off, you can reduce the humidity inside
the house, you can warm the windows.
When you have window treatments that cut off air circulation to the
windows, it allows the window glass to be colder and when it get below the
dew point you get dew on the windows. Curtains do not stop moisture nearly
as well as they stop heat. Sometimes opening the drapes or curtains will
take care of it. Of course adding an additional window pane will also help
since it will cause the glass on the inside to be warmer.
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