Where did the RH Go

[Sarah Fox]

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