The pan is large, about 14"d and about 12" tall with parallel sides. I run the burner on nearly the lowest setting so that if it runs out of water it won't burn the pan.

Yes, the sides of the pan radiating heat will affect the loss some, but I am thinking for the most part heat in will equal water evaporated, more or less.

Thanks for the responses.

I have to go check my water now.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.