Not unless you were to make a hole in the chimney where it passes the attic space. Then your fireplace could never be used again. You should have attic vents that you can get to easily. Just run over to one of them. To my knowledge all house attics have them, yours should be no different. If you were worried about being seen by the flir it would look alot funnier to that camera if heat was coming out a chimney in August. Use the attic vents, better, easier, and safer. :rasta: