For years, Kalfire has been a benchmark in sustainable energy by virtue of its fires’ low energy consumption and exceptional flame dislay.The ECO setting is a prime example. In addition to the eight standard flame height settings, our fires include a ninth, energy-saving option. When the ECO setting is selected on the iMatch remote control or the iMatch app, an electronically operated valve alternately increases and reduces the gas supply to the fire following a sine wave pattern. This creates the appearance of naturally fluctuating flames as in a wood-burning fire.