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My outdoor wood furnace, for example"
There's some info behind the following link. Notice the "Step 2" "emission limits" in five years.
http://www2.epa.gov/sites/production/files/2014-02/documents/proposed-nsps-overviewslides20140218.pdf
The appliances to be affected: adjustable burn rate stoves, single burn rate stoves, pellet stoves, outdoor and indoor hydronic heaters, forced air furnaces and masonry heaters.
The wood stoves allowed by step 2 of the EPA rule (probably with catalytic reburners and/or filters) will be extremely expensive and use far more wood than a contemporary home-built rocket stove mass heater or masonry heater. But there are always ways around being robbed by the political/regulator class, and technically inclined people will find those ways.
Components for a solar, drainback heating system and rocket stove mass heaters were already already outlawed by regulations that allow local mechanical inspectors the discretion to reject them. Factory-built, SRCC certified solar collectors and approved masonry heater installs don't save money.