Courtesy of The Firewood Affiliation of Australia
In the US the federal EPA has not too long ago introduced a proposal to update the 1988 emission boundaries for new wood stoves.  While the new laws is nevertheless in its consultation stage, it is proposed that it will be released as regulation in 2015 and will have a five 12 months stage in period.
In the US they measure particulate emissions in grams for each hour rather of the grams for each kilogram that we use in Australia, which makes a direct comparison hard.  But the intent of the laws is significantly the same as proposed in the modern draft of the Australian wood heater emission expectations, which is to significantly decrease emission prices for new heaters. [The Alliance did a more in-depth investigation of the new, proposed Australian wooden heater rules in August 2013. – eds]
Comparable to the situation in Australia, it appears that these new limits are generally supported by the big heater companies, who have the capability to develop new, compliant designs, but opposed by the more compact companies who cannot very easily manage the costs of improvement and testing.
In both the US and Australia the new boundaries will not apply to existing heaters, so any reducing of neighbourhood smoke ranges will just take a extended time to materialise, provided the twenty 12 months furthermore lifespan of most wooden heaters.  In both international locations wood heater manufacturers would like to see governments support (or enforce) the substitute of aged heaters with new designs, for the evident purpose.  However, it seems that governments are reluctant to head down that route.
Due to the fact these new designs of wooden heater are considerably easier to function with out creating excessive smoke, the gradual substitution of installed heaters need to consequence in significantly less smoky heater problems.  The experiment carried out in the city of Libby, Montana in which every single wooden heater in this little city was modernised or replaced, confirmed that improving the heater inventory can have a modest effect on smoke amounts (thirty%).  However, this experiment clearly demonstrates that heater procedure follow has by considerably the biggest influence on smoke emissions and is anything that can by changed at no excellent price with immediate influence.