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A PTC (Positive Temperature Coefficient) heating unit is a type associated with heating element of which provides safe, high efficiency, and consistent heat. In Lay-Z-Spa hot tubs, PTC heating elements are used to maintain the water temperature at a secure level while offering key advantages over traditional heating components. How PTC Heating units Work PTC heaters are made associated with ceramic materials of which have self-regulating attributes. As the temp rises, the electric powered resistance of