All Heat-Line systems feature Heat-Line self-regulating heating cable technology which can increase heat output with cold but more importantly, decrease heat output with warmth. Unlike outdated heat tape, Heat-Line electrical heating cables will never overheat, are long-lasting, easy to install and operate, safe to insulate and extremely energy efficient. Heat-Line self-regulating cables take away the uncertainty by ensuring that every system is meticulously tagged, tested, and factory certified to meet the rigorous standards for self-regulating cables by renowned North American regulatory agencies like CSA and NSF.