On Sun, 18 Oct 2009 18:03:04 -0400, Wes wrote:

Don Foreman wrote:

On Sat, 17 Oct 2009 05:22:15 -0400, Wes wrote:



Maybe with the 4000# of metal in the room, the temperature swings won't be too wide.

Right. With all that thermal mass, the room's thermal time constant
should be quite long.


I forgot to think about the concrete floor, I have a feeling that is going to add greatly
to the thermal time constant.

Wes

Concrete has considerably higher thermal resistance than metal so it
doesn't take much heat flow to get surface temp up near ambient. A big
chunk of metal needs to be warmed clear thru before it'll feel warm.