And on the second day it was full of nesting sparrows, which changed the
thermodynamic principles as they started to build a nest. Which insullated
the sensor.

--

Christopher A. Young
Keep Jesus Christ in CHRISTmas
www.lds.org
www.mormons.com


"Jeff Wisnia" wrote in message
...
William W. Plummer wrote:

Stormin Mormon wrote:

Now, this is an interesting subject. First, the actual temp isn't
really 68
or 72, cause the actual zero is about -450, where the mollecules stop
jiggling.

Not really. It doesn't get down to absolute zero, at least in my
neighborhood.

You are concerned with the heat flow out of your house. Heat flow is
proportional to the DIFFERENCE in termperatures, inside and outside. And
it's inversely proportional to the R-factor of the walls.

In a previous house I wired an old electric alarm clock across the
circulator pump so I could measure how much the system was producing
heat for the house. The result was that only loose correlation with
the degree-days. Wind seemed to have a much bigger effect.

Some degree day monitoring systems I've seen do attempt to take wind
into account.

One I saw looked like a birdhouse on a pole. It had a small electric
heater and a remote reading thermometer inside it.

You can figure out the rest.

Happy Holidays,

jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"As long as there are final exams, there will be prayer in public
schools"