I was planning on two circuits and two thermostats---each circuit carrying two heaters each. I think my diagram in my previous post was misleading... (I was replacing blue and black with orange and purple)

Attached are two better diagrams---scenario #1 and scenario #2. My question is---are these both correct? Is it essentially two ways to diagram the same thing? Because the instructions with the radiator indicated 'Scenario #2' as the way to wire a two-radiator set-up.

Whew, took me a while to find the differences between #1 and #2.

Like looking for a needle in a haystack.

Scenario #2 is correct connection.

Do you see why?

Hmm... not sure actually. I'm stumped. I could have talked myself into either scenario! Is it because Scenario #1 would put the load on one heater over the other first, instead of splitting them first as to be safer?

But Scenario #2 is the way to go, huh? Thanks for all your help!

Why is #2 correct over #1? Both seem to be circuits to my untrained eye, but I can't pick out the difference...

The load side of the stat in sketch #1 shows the two heaters in series with the stat.

#2 is correct because the two heaters are in parallel.