The revolutionary PTC (Positive Temperature Coefficient) technology is the most efficient way of room heating. It uses small ceramic stones with self-limiting temperature characteristics, which have fast heating response times and plateau at pre-defined temperature. PTC heating elements automatically vary wattage to maintain pre-set temperature, thereby saving power. They are absolutely safe, as irrespective of magnitude of current applied to the PTC, it will never surpass the set temperature. PTC ceramic stones are highly reliable, have long life and are compact in design so PTC Heaters not just look good but perform better.