EnergyLogic is a leading manufacturer of used oil furnaces and boilers. With the highest number of standard features and most comprehensive warranty on the market, EnergyLogic used oil furnaces and boilers can eliminate the cradle-to-grave liability, reduce heating costs and generally have a payback period of a single heating season and the lowest cost of ownership. All EnergyLogic waste oil heating systems are UL-listed and meet or exceed all EPA regulations. Tens of thousands of our energy-saving solutions are currently in use ? from small garages to the largest corporations in the world.