Where did the RH Go

[Sarah Fox]

Hi Don,

> Or else there was outside air infiltrating into the room. This is far more
> likely in an old house. It's really quite dramatic to do the calculation
of
> outside air at 70% relative humidity at -15 C and bring it into a house
> raising the temperature to 20 C.

Ah yes, my dear Watson, but you forget that the radiators were not warm, and
yet the temperature held steady.  Methinks the air entering the room was
warm and thus could only have come from the rest of the abode, and so the
real culprit must have been a hidden ventillation duct or large gap between
rooms.  Perhaps an open transom!  Yes, cherchez le transom!  ;-)

Peace,
Sarah





>
> Have a look here:
>
> http://members.nuvox.net/~on.jwclymer/rh.html
>
>
> At 03:26 PM 1/13/2004 -0500, you wrote:
> >Hi Bill,
> >
> >> >House heating method?
> >>
> >> Steam radiators, which were cool all during the time I was there (and
> >> the temperature was holding steady while the RH was tumbling). I need
> >> to get the details of the house insulation from the owner. As well as
> >> sell her a DC!
> >
> >If....
> >
> >(1) It was cold outside, and
> >(2) there was no insulation in the walls, and
> >(3) the radiators in the room were not active, and
> >(4) it was still warm (and stable) inside the room,
> >
> >then there had to be some considerable source of external heat.  I can
only
> >conclude that the room received a substantial flow of warm (and dry) air
> >from the rest of the house.  I think there's no need to look further for
the
> >answer to the plummeting RH mystery.  ;-)
> >
> >Peace,
> >Sarah
> >
> >PS I didn't have time to refill my humidifier this morning -- places to
go.
> >It went 7+ hours without shedding a drop of water into the air.  When I
> >returned, the RH had dropped about 1%.  Same temperature. YMMV
> >
> >_______________________________________________
> >pianotech list info: https://www.moypiano.com/resources/#archives
> >
> >
>
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
>
> mailto:pianotuna@accesscomm.ca
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>
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