harry wrote:
On Dec 4, 7:07 pm, Edward Reid
wrote:
On Sat, 4 Dec 2010 08:05:36 -0800 (PST), harry
wrote:

That is called the Coefficient Of Performance.
http://en.wikipedia.org/wiki/Coeffic...rmance#Example
Again, nothing to do with efficiency.
In that sense, everything is 100% efficient, because mass-energy is
always conserved.

This viewpoint however is not particularly useful to someone trying to
figure out how to heat a house.

For a discussion of efficiency to be meaningful, you have to say what
you are measuring with respect to. Absolutes are not useful.

Edward

Efficiency is a scientific term and thus scientifically defined.
I wish you'd get your brain into gear before your fingers. Spend ten
seconds checking the facts & then you wouldn't appear half so foolish.

Efficiency is the amount of input converted to useful output
divided by the total input.
I'd say that YOUR efficiency in this thread is pretty low.

So, how about you get back to the point and quit trying to demonstrate
your superiority. It ain't workin'!!

http://en.wikipedia.org/wiki/Energy_...ion_efficiency

The thread is about water heaters not heating houses.
But if you want to know about that, start a thread and I can explain
that too.
You need to start with the theory and then move on to the practical
matter of how to apply it.