We have a room, used to be two rooms now joined but with the fireplace stack in the centre. Currently open so you can see through, with the flue above. My partner wants a cassette type burner, okay, I've left it to her to arrange, she is about to accept a quote for two cassette fireplaces, one each side of the stack, but in the same room. My concern, primarily is while they are back to back, as they are in the same room, they might as well be next to each other. I think she has got a salesman who sees two sales rather than one. Secondary to this is who is going to have two fireplaces next to each other, lighting, stacking wood and cleaning, not me. One will never get used. If they were both used, won't they compete? Plus, I'm concerned about the draw from one - whichever is running, coming from the other, in particular if there are two flues and the chimney's are adjacent or even combined. It sounds like bs, possibly dangerous bs. Any thoughts, comments would be appreciated. I'm the husband so my comments are just an "opinion". I've also said I want more than one quote.