4 Best Wood Stoves In 2022 (50,000+ BTU + High-Efficiency) According to the DOE, the 4 factors that make a wood stove an excellent choice are: “Cleaner burning”. Older woodstoves released up to 30 g of smoke per hour (30 g/h). Modern EPA-certified wood-burning stoves produce less than 4.5 g of smoke per hour. The best wood stove insert emission rate is only 1.26 g/h. “More efficient”. Older ...