On March 16, 2015, EPA published a final rule that made revisions to the New Source Performance Standards (NSPS) for new residential wood heaters (80 FR 13672). The 2015 final rule (40 CFR part 60, subpart AAA and QQQQ) updated the 1988 NSPS to reflect significant advancements in wood heater technologies and design, broadened the range of residential wood-heating appliances covered by the regulation, and improved and streamlined implementation procedures. The 2015 rule requires manufacturers to redesign wood heaters to be cleaner and lower emitting. In general, the design changes also make the heaters perform better and more efficiently. This entry in the regulatory agenda describes EPA’s review of this action pursuant to section 610 of the Regulatory Flexibility Act (5 U.S.C. 610) to determine if the provisions that could affect small entities should be maintained or should be rescinded or amended to minimize adverse economic impacts on small entities. As part of this review, EPA is considering comments on the following factors: (1) The continued need for the rule; (2) the nature of complaints or comments received concerning the rule; (3) the complexity of the rule; (4) the extent to which the rule overlaps, duplicates, or conflicts with other Federal, State, or local government rules; and (5) the degree to which the technology, economic conditions or other factors have changed in the area affected by the rule. The results of EPA’s review will be summarized in a report and placed in the docket at the conclusion of the review. This review’s Docket ID number is EPA-HQ-OAR-2024-0089.