Teflon is an insulator compare to iron. Thermal conductivity W/(m K) Teflon 0.25, Iron 80[1]. So Teflon coating reduces cooking, heating efficiency. [1]engineer

Teflon is an insulator compare to iron. Thermal conductivity W/(m K) Teflon 0.25, Iron 80[1]. So Teflon coating reduces cooking, heating efficiency. [1]engineeringtoolbox.com