I looked around at the different types of fireplaces and the choices are overwhelming. I don't know which one is appropriate for my application. Here's my situation: There's a chimney with a hole in it, which I believe was used for a wood stove or pellet stove vent. I want to convert that to a fireplace, preferably propane. Is there something that will just hang on the wall with a vent to the hole in the chimney?