EPA stoves are using very simple (but well designed) secondary burn strategies, and some add a catalyst for tertiary burn. Units that have both are referred often as "hybrid" units. In general they burn far less wood, and have higher heat output than a comparable basic wood stove. Once either reaches operating temp, there is pretty much zero smoke. I'd be leaning towards a secondary burn only (they have some extra air/combustion tubes and a baffle at the top of the firebox) for simplicity as you don't have to worry about a catalyst to replace.
That said, the catalyst in these units will generate heat for a very long time (check out some temp/time data on these units!) if you're ok with a bit more tech which is why the hybrid wood burning units are in the 80% efficiency range.
We have been using a Napoleon 60K BTU fireplace for over a decade now. It will easily heat our main floor to 28 C with outside temps at - 25 C. Zero smoke and very low wood use. Ours has an outside combustion air system, but more recent findings are that air requirements of these units are so low (once operating at temp) that outside air is of little to no advantage.
You'll find listings here:
https://cfpub.epa.gov/oarweb/woodstove/index.cfm?fuseaction=app.search
Google is your friend:
https://www.regency-fire.com/en/Products/Wood/Wood-Inserts
Inserts by their nature will often be smaller to fit in existing firebox spaces, so you'll want one with a fan(s) to move heat out more efficiently. Our fireplace has two blowers (installed after installation) which help speed up heat gain, but we often turn them off as the radiant heat from the unit is quite intense.
www.bestfire.com