Yes, For example, if you have a typical unregulated stove and use three cords of wood (at $100/cord) and have three chimney cleanings (at $50 each) per season, you can save about $200 per season by purchasing a new EPA-certified stove.
If the new stove is catalytic, you will save an additional cord of wood out of every three cords you burn each season. (see my 2/08/08 posting on: What are the advantages of using a catalytic wood burning stove?)
Your actual savings will vary according to how often you use your stove and other factors. Nationwide, the net savings from reduced firewood consumption and fewer chimney cleanings is estimated to be $30 million annually. In addition, the health and welfare benefits resulting from fewer smoke-related illnesses and from reduced materials damage is estimated at about $1.5 billion annually.