2/4/2020 19:57 – The company was dispatched to Brookfield Ave for the report of a CO detector sounding. Heavy CO was found in the residence. The company secured the heater and hot water heater and ventilated the home while monitoring the air quality. The neighboring residences were also checked and no CO was found. Narberth Ambulance responded and checked the residents for carbon monoxide, all were found to be good condition and did not need treatment. PECO responded to the scene and found heater and chimney issues.