Onetap wrote
Harry Bloomfield wrote

Air will always either flow up a wall surface or down it, depending
upon whether the wall is warmer than the air or cooler than it. In
the process of moving along the wall, it must pass through the stat..

I cannot think of any circumstance where there would not be a flow of air
through a thermostat, without need of an internal heater to encourage the flow.

Wall surface is approximately the same temperature as the air

Wrong. The heat can only be leaving via the walls and roof and floor.

= No/negligible heat transfer between the wall and the air

Even sillier.

= no/inadequate convection air currents along the the wall.

You can see it with suitable thermal imaging.

Ther sarcasm in the previous post went way over your head.
Mr Newton says you have to have an energy input to move
(or accelerate) mass. If there's no fan and heat differences
to cause convection, what moves the air through the thermostat?

The air flowing up or down the wall, as he said.