High levels of CO emissions from rooftop boiler pulled into building
October 1, 2021
Regulated industry sector: Gas – Natural Gas System
A hot water boiler in a rooftop mechanical room was emitting high levels of CO out to the rooftop, where a nearby rooftop air handler fan pulled the CO into the building, setting off alarms. The likely cause of the hazardous CO levels was a faulty gas valve that led to improper combustion.