Question: Hi I own a home which the fireplace(woodburning)faces the Living room. Behind the fireplace, is our den. When we make a fire and go into the den, we look at a brick wall. It kills us because if we were able to break thru the brick wall we would see the fire from the reverse side, thus having a two sided fireplace. Can we do it? One of our neighbors did it (same house) and said it works trouble free. We did have some professionals in to discuss same one told us no problem, and the likelihood that it would be ok is 80%. If not we could change the damper, and or put an exhaust fan in. (if necessary). One person told us we would create a problem. Answer: My thoughts are pretty much the same, except I give it only a 50/50 chance of working without a chimney fan. The damper area and damper should definitely be replaced. The flue is probably not large enough. See the article on Fireplace Sizing at https://www.hearth.com/what/specific.html I personally would not do this myself...that's my opinion.