An intense fight is going on in Utah, where a boiler manufacturer is making case that outdoor boilers are cleaner and more efficient than wood stoves, so they shouldn't be regulated any differently. In my opinion, even Phase 2 qualified outdoor boilers should not be allowed in valleys that experience lots of inversions and are in air quality non-attainment. There is simply too much potential for them to be operated poorly by the owner. Industry fought so hard to clean up the air in places like Libby, and this sort of precedent could be big set-back for valleys like that. We posted some stuff on our blog about it http://forgreenheat.blogspot.com/2013/03/outdoor-boilers-cleaner-than-wood.html, but interested to hear what folks think about it. Check out attached "fact" sheet that is being circulated in Utah.