Personally, I would never vent into a chimney, But thats just me! I would buy before I die growing it, LOL There are many was to vent into a rm without all the smell. One is a 8" platform with divider the same size as tent bottom under the tent with intake on one side and exhaust the other. Pick up carbon filters (small sheet panels ) for the furnace etc and install on exhaust side. You can install a hepa filter on the air intake side if you choose. The system works very well. You are only limited by your imageanation!