cmonSTART said:
Ok, someone jump in and correct me if I get it wrong. New wood stoves today are required by the EPA to burn cleaner than older stoves which means they all must have some means of reburning the smoke from the fire. There are catalytic stoves, in which the smoke passes through a catalytic chamber (like in your car) which does the job, and there are non-catalytic stoves which use insulation and baffling within the firebox to redirect the smoke over the fire again and make it burn.
So, a non-cat EPA stove would be an EPA approved new model, without a cat in it. I use one and I love it. Works pisser.
nope start , you got it correct , im going to expound on it just a bit. a "catalytic" stove is designed so that once the catalyst heats above a certain temperature the "smoke" is incinerated inside the cells of the cat. most all of these units have a "bypass" system which is needed for easier starting once the cat ignites the bypass is closed and the entire exhaust is ducted through the cat for reburning. during this process the catalyst can operate at temps of several hundred to over a thousand degrees F. this allows the stove to burn a low long burning fire and use the cat for a large portion of the heating chore.
a "non-cat" essentially carries out the reburn in the firebox itself or in specially designed chambers that the exhaust is ducted through (mostly the former) heat from the fire is reflected back down into the top of the firebox where fresh air is introduced through tubes or perforated plates. this heat along with the added unburned air allows the unburned fuel that usually leaves through the flue to be consumed this also allows for some pretty impressive BTU numbers.
both stove types have their advantages and disadvantages but both work very well to not only reduce emmissions , but also to generate much more heat while doing so.