also, once the inside air may be at ambient, so no currents from the front glass to the outside, the mirror will still have to be ambient the internal air as well.
so, a temp sensor on the back of the mirror may still be needed. The internal air my need to go below ambient to get mirror to ambient and then let them settle for 1/2 hour similiar to bird does.
ok, enough thoughts for now, feel free to rip it to pieces if i have overlooked anything
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