From NFPA: An estimated 15,200 reported creosote fires (23% of all home heating fires) resulted in four civilian deaths, 17 civilian injuries, and $33 million in direct property damage, on average, each year from 2004-2008.

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Here are some statistics from NFPA's report, “Home Fires Involving Heating Equipment (PDF, 723 KB)," by John R. Hall, Jr., September 2010.