Why is there soot in my unit? Either a lack of air or a log impeding on the flame creates soot. By Anna Corwin|2020-03-04T09:58:14-08:00March 4th, 2020|Gas Stoves & Fireplace Inserts|Comments Off on Why is there soot in my unit? Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail About the Author: Anna Corwin