In the apartment I'm living I have a big living room (so much air to heat up!!) with a fireplace. The fireplace sucks... but I guess you all know that already
I've been thinking in buying a wooden stove and connect it to the fireplace exit, at least it would get me more heat inside the room.
Today while I was browsing the forums I was asking myself: would it be possible to build a rocket heater inside the living room and connect it to the fireplace exit too? Probably not so easy, but it would be a fun experiment, and way cheaper.