Cissell Investigative Engineering LLC does not try and interpret policies or give advise on coverages. Our role is to determine origin and cause. We understand that many policies cover a hostile fire and ensuing damage and delayed ignition, aka the puff back. Our experts examine the patterns to determine the origin. We've encountered a number of life threatening causes, unrelated to the claimed cause as a result of using our approach. Subrogation is uncovered frequently as well as educating the insured as to the effects of some of their habits. A laser particle counter is used to document our findings as well as provide a positive feedback to the insured. When a boiler or furnace is involved, our master licensed technician has over 35 years of experience with all types of HVAC equipment, residential to industrial, to conclusively determine the cause and find supportable subrogation.