Please give me your opinion about positioning of inlet and outlets on the tank.?

Question

circulation is by convection. I am in doubt about their vertical relationship, one to the other. Inlet to panel. outlet from panel return to tank. and outlet to tixtures.

Answer 1

In at the top, out at the bottom via filter.

Answer 2

You omitted the basic nature of the device involved.

Is this a tankless water heater, an electric water heater? a gas tank heater? A solar assist water preheater?

Answer 3

Assuming you have a heated tank that is supplying hot water to radiators, or something like that, then for a convection system the hot water from the top of the tank should go to the bottom of the radiator, with the top of the radiator returning to the bottom of the tank.