https://www.firehouse.com/operations-training/article/55355686/firefighter-scba-thermal-imaging-cameras-msa-company-carbon-monoxide-risks-in-gas-fired-wall-heaters-response-procedures-for-firefighters
Jerome Hathaway warns that maintenance of gas-fired wall heaters in residences can slip through the cracks, and as a result, a hazardous operating condition...
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