INOV8 started in 1990 with a single patented furnace that uses waste oil as fuel. It has since expanded to 4 furnaces, 12 boilers, 3 waste water evaporators, an oil tank, and a designed & tested fryer-fueled water heater - all with the option of using any available fuel including waste motor or fryer oil. INOV8's gas & oil burner certified in 2010 provides automatic switching between fuels and backup to gas should the oil be depleted.