One neighbor died and five others were stricken in the early morning hours today following a carbon monoxide poisoning incident at a Bernal Heights home on the 300 block of Moultrie, near the intersection of Eugenia.
Firefighters were called to the scene at 4:26 a.m. A carbon monoxide alarm was going off in the residence. Four residents on the upper level of the home were able to get out and were treated at the scene. Two residents on the lower level of the home were impacted by the carbon monoxide. An elderly woman was taken to the hospital in serious condition. An elderly male died at the scene after firefighters tried for 45 minutes to save his life using CPR and other life-saving methods.
The last known incident of carbon monoxide poisoning in Bernal Heights happened at a home on Cortland Avenue in 2012.
Bernalwood 
This points up the problem with alarms and the elderly. Many old folks can’t hear high-pitched alarms because they’ve lost their upper range hearing. Yet, alarm makers continue to make alarms with high pitched noise makers because they’re cheap to make, usually using piezo electric crystals Here’s a link to a discussion on the issue, but alas it goes back 8 years and I’ve still not seen any lower-pitched alarms on the market. https://groups.google.com/forum/#!topic/alt.home.repair/Lya28813pzQ%5B1-25%5D.
Any word on the cause/source of the carbon monoxide?
Fran Maffeo, the elderly resident of the lower level apartment has been released from the hospital and is recovering and managing her grief at the lost of her partner of 40 years. Please consider giving to help.
https://www.gofundme.com/fran-even-bernal-heights-tragedy
Was there ever any news on the source of the carbon monoxide?