Over several years, staff has conducted research and worked with voluntary standards organizations concerning the risk of injury and death associated with carbon monoxide (CO) production and leakage from residential gas furnaces and boilers.  In 2019, the Commission issued an advance notice of proposed rulemaking (ANPRM) to initiate rulemaking under the Consumer Product Safety Act and requested comments on the risk of injury and alternative approaches to address the risk. On September 24, 2021, the Commission voted to change the fiscal year 2022 deliverable from a notice of proposed rulemaking (NPRM) to Data Analysis and/or Technical Review (DA/TR). On February 9, 2022, staff provided a summary and status update in a public briefing to the Commission. Staff continues to investigate sensing technology to automatically adjust or shut off major natural-gas appliances, such as furnaces and boilers, in response to abnormal operating levels of carbon monoxide in their combustion products and will share its findings with the relevant voluntary standards organizations. Staff will develop an NPRM briefing package and submit it to the Commission in fiscal year 2023.