I remember when I first put one in my old house, more of a modern big thing, didn't have a overnight burn etc, just burnt or went out, but the heat output was something else, we were lucky as it was an old converted coach house, and I,d plumbed it in at the rear of the original chimney (the original opening was now in the bathroom (the old tack room), but sealed off) the chimney was central in the house and after the first floor was on its own (four walls 3x3 ft)
My best mate loved it, in fact he got moody and wouldn't settle until it was lit, he got that hot you could bake spuds on him, as he wouldn't shift and got closer as the night drew in, of course this was a Doberman still with his tail, (like a dinosaur tail at times) and a whoosh of the tail when he got up to turn around would guarantee a smell of burning dog hair as it brushed against the glass.........
gtodan, Know what its like I had to put Butch down in 2010, we were lucky as we still had the Wife's terrier cross but when I had to get her put down last year............... not a dry eye in the house for two days.