We call it the EVERBURN System and it’s designed to deliver cleaner emissions and longer burn times, similar to a catalytic system. Our state-of-the-art design enables Defiant and Encore stoves to burn more steadily and longer on a single load of wood compared to other non-catalytic stoves. So now you can enjoy all of the beauty and style of a traditional cast iron stove with a new level of convenience and efficiency. Just what you’d expect from Vermont Castings™.