Chimney Balloon 12"x12" Inflatable Blocker (Medium Chimney Pillow Save up to 30% on your heating bill, and stop cold fireplace draft debris and odor! 15 years of happy Chimney Balloon owners have found it can pay for itself in one month of saved heat! Easy Do-it-yourself installation! Measure - Order - Install! Every fireplace is unique, so Chimney Balloons are available in 100 sizes! For more sizes call 608-467-0229 The US Department of Energy says 14% air infiltration enters the home through the fireplace