Used to, not anymore. Old wood stoves produced as much as 50+g./hr. of particulate matter, current standards are 2.5g./hr. for cord wood for new EPA-certified w

Used to, not anymore. Old wood stoves produced as much as 50+g./hr. of particulate matter, current standards are 2.5g./hr. for cord wood for new EPA-certified wood stoves since 2015. Most masonry heaters constructed in the last 20 years are in the 1-3g/hr. range (and for this reason have never needed EPA certification).