stackyFACTSThe secret to climate control is essentially a tiny metallic wrestling match.
The secret to climate control is essentially a tiny metallic wrestling match. Older dials rely on a bimetallic strip, which is simply two distinctly different strips of metal glued perfectly together. As the room warms up, one metal expands slightly faster than the other, forcing the entire strip to aggressively curl in one direction until it hits a switch and turns the furnace off. It is incredibly simple thermal geometry.
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