Thanks all, this is what I finally found. This make more sense now,
with a catalytic converter looks like more work, AMUN, your correct...
less headaches with non-catalytic... Thanks all.
How You Can Reduce Emissions
The most effective means to reduce air pollution from wood-burning
appliances is to buy a new, efficient, EPA-certified woodstove, or to
install a catalytic combustor on your existing stove. Catalytic
combustors are honeycomb-shaped devices that improve combustion
efficiency by burning particulate matter and other gases before they
escape up the stove pipe. Catalytic combustors come installed in some
new stoves or may be retrofitted to them. They should be visually
inspected at least three times every heating season and replaced
according the manufacturer's recommendations. Some stove designs use
baffles, secondary combustion chambers, and the introduction of
secondary air to improve combustion efficiency.