I really don't understand it. I could never imagine a UTH providing heat for and entire cage, yet a RHP is essentially the same and can in my setup.
That's about all I can say without having Bob get into the conversation. I'm assuming your panel does nothing for your cool side?
What really surprises me is my Herpstat probe is suspended and touches nothing, yet when the cool side cage temp hits 80 degrees, I see the temp on the stat say 80 and the power output % meter drops to zero.
I told Kite in a PM that this summer I'll really see how it goes. Our basement gets colder in the summer because of the AC even with the vents closed.
KMG. you are keeping bloods?? Love that avatar of yours. Nice!