Which of the following is not a determination required from the inspector regarding fireplaces?

The determination regarding the remaining life expectancy of systems is not a specific requirement for home inspectors, including those trained by the American Society of Home Inspectors. Inspectors focus on evaluating the condition of readily accessible components, identifying the presence of hazardous substances, and noting the cost of repairs when applicable. The life expectancy of a fireplace system can be subjective and varies widely depending on factors such as usage, maintenance, and environmental conditions, making it difficult for an inspector to provide a concrete estimate. Therefore, this aspect does not fall within the standard scope of a home inspection, highlighting why this choice is not required for inspectors.