Ethan's post seems to be the definitive answers to those questions.
Well worth saving.
On Wed, 9 Dec 2009, Ethan Dicks wrote:
But we do use outside air to cool them. It's free
except for the
power to push it around. (Oh... and +35F is never seen at the Pole -
the record is +7.5F, and I've personally been around for +7.0F).
If it ever goes to 35F at the poles for more than a transient,
then my house becomes either beachfront, or under water.
into a lab freezer at -40F for a few hours, then into
a lab
. . .
ICs can be stored down to -40 typically, but not
operated . . .
You've been very conscientious about identifying every
temperature number
as either C or F. I've often wondered whether you would do so with -40.