Mae galwadau diangen hefyd yn amharu ar yr eiddo dan sylw. Maent yn arbennig o gyffredin mewn lleoliadau gofal preswyl, lle gallant achosi poen meddwl i bobl sy'n agored i niwed. Mae galwadau diangen i eiddo masnachol yn amharu ar waith staff, mae'n rhaid i gwsmeriaid adael, ac efallai na fyddant yn dychwelyd. Mae'r golled hon mewn cynhyrchiant a chwsmeriaid yn sgil galwadau diangen mewn eiddo masnachol yn costio tua £28 miliwn y flwyddyn yng Nghymru.
False alarms also cause disruption in the premises where they occur. They are particularly common in residential care settings, where they may cause annoyance and distress to vulnerable people.  False alarms in commercial premises mean staff have to interrupt their work, customers also have to leave, and may not return. This loss of productivity and custom caused by false alarms in commercial premises costs around £28 million per year in Wales.