On Sun, 10 Feb 2008 22:32:43 -0500, Nate Nagel wrote:
Hi Nate and others,
I appreciate the help.
One thing that confuses me to no end is this EFFICIENCY thing.

If both a 50 gallon and 40 gallon water heater has the same 59 percent
efficiency factor ... do they cost the SAME to heat?

Or does the 50 gallon water heater actually cost more even if it's the same
efficiency?

The reason I ask is I assumed they cost the same to operate but someone
said the smaller water heater will cost less to operate even if the
efficiency factor is the same.

Can someone who understands this clarify if a larger heater truly costs
more to operate than a smaller volume heater even if the efficiency factor
is the same?

Donna