Static is [not] your friend - vacuuming PC?

[chrisv]

What kind of climate conditions are you dealing with?

(snip of things I agree with)

What you've described sounds like a seriously faulty vapor
barrier.

c/faulty/normal

True, with careful construction, the problem can be mitigated...

The air-to-air heat exchanger should allow you to
maintain a *higher* relative humidity inside the house than
otherwise would be possible. (Assuming colder outside
temperatures; though perhaps you have exactly the opposite???

Well, no. The humid inside air is vented to the outside, and is
replaced by colder, drier, outside air. Obviously, this lowers the
humidity in the house below what it would be otherwise. I'm not sure
what you're getting at...

 

[Rob Stow]

Well, neither of us is absolutely correct, but I will say that I've
observed condensation, on my double-paned windows, when my ventilator
was off. Never with it on (it's got automatic humistat control),
though.

When it hits -40'C outside I see condensation on my
double pane windows if the RH in my apartment is above
30% - and that seems to be about the norm.

I see static problems when using my mouse and keyboard at
only 30% RH, so I tend to set my humidifier to 35% and
just live with condensation during cold snaps.

People in newer homes here tend to have triple pane
windows and can be condensation-free at -40'C and 40% RH.

Most people around here use humidifiers during the winter
and the rule of thumb for avoiding condensation is to set
it for 30% RH at -40'C and increase the RH by 1% for every
1 degree increase in the outside temperature. That "rule
of thumb" predates the widespread use of home computers and
I have fixed a lot of sporadic computer problems simply by
telling people never to let the RH go below 35% or 40%.



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