In article ,
"Steve Barker" wrote:

the water leaves the heater at a certain temperature. It's not going to get
hotter, i don't care if you wrap 12 inches of cellulose on it.


s



yeah, but... it's the temperature at the spigot that counts. That will
be (imperceptibly) warmer. Perhaps it would be more correct to say, it
won't lose as much heat.