@Jacki12 I don't know the answer to your question, but any guest who thinks it's okay to toast marshmallows in an indoor fireplace is an idiot. I've never heard of such a thing. I'm sure we'd all just love scraping gooey dried marshmallow droppings off the floor.
Personally, I would not consider a pellet stove a fireplace. I wouldn't list it as one - those who are expecting a fireplace might be disappointed but those who are not will be pleasantly surprised.