Most homes and apartments are now required to have one CO (not CO2) detector (source), usually you only need one and might have mistaken it for a smoke alarm. If you don't, add one from a home improvement store or ask your fire department (lots just have ones to give out)
krone-icals t1_j1t4stg wrote
Reply to comment by Pookie2018 in Everybody talks about having a CO2 detector but never what to do if the alarm goes off. by kymilovechelle
Most homes and apartments are now required to have one CO (not CO2) detector (source), usually you only need one and might have mistaken it for a smoke alarm. If you don't, add one from a home improvement store or ask your fire department (lots just have ones to give out)