Boilers and furnaces are governed under which Subpart?

• A. Subpart H
• B. Subpart J
• C. Subpart A
• D. Subpart C

Answer: (A)

The main idea here is to know which regulatory subpart directly applies to combustion equipment like boilers and furnaces. Subpart H is the rule set that specifically governs boilers and furnaces, laying out which units are subject, the emission limits that apply, and the required testing, monitoring, and reporting to show ongoing compliance. Understanding this helps you match a piece of equipment to the exact regulations it must follow, rather than to general provisions or to subparts that cover other source categories. The other subparts address different kinds of equipment or broader rules, so they don’t fit the specific regulatory framework for boilers and furnaces.