For an indirect heated hot water tank, the hot water comes from a boiler.
Why are there two output ports on my tank?
I have appended below a diagram of an HTP/Superstor tank to use as a reference:
A - emergency relief
B - outlet 1
C - thermostat
D - input to boiler
E - output to boiler
F - outlet 2
So, from the diagram you can see that there are two outlets. Does the hot water make a circuit and one is an outlet and one is an inlet?