EPA emission regs were in place in 1992. They started in 1988 I think. It would be an early model of what is sold today probably.My aunt and uncle have an Osburn stove they put in their house when they built it 28 years ago, it probably goes through 3 cords of wood a winter. It still looks like it's less than 10 years old. Of course it was built before the stringent emissions standards came into effect.