Chimney Balloon 9"x15" Inflatable Blocker (Small Chimney Pillow) Save up to 30% on your heating bill, and stop cold uncomfortable fireplace draft The Chimney Balloon stops unwanted chimney odor, outside noise and debris from entering the home Easy Do-it-yourself installation! Measure - Order - Install! Every fireplace is unique, so Chimney Balloons are available in custom sizes. Call 608-467-0229 The US Department of Energy says 14% air infiltration enters the home through the fireplace