Mae'r adroddiad yn nodi mai systemau larymau tân awtomatig yw prif achos galwadau diangen. Mae hyn yn digwydd pan fo'r systemau hyn naill ai'n cael eu cynnal a'u cadw'n wael, eu gosod mewn ffordd sy'n golygu bod llwch, stêm, mwg wrth goginio a phethau eraill ar wahân i dân yn eu hysgogi. Felly, mae modd eu hosgoi yn gyfan gwbl. Mae ysbytai a lleoliadau gofal, prifysgolion a sefydliadau addysg eraill, ac eiddo manwerthu ymhlith yr rhai sy'n profi'r lefelau uchaf o alwadau diangen.
The report identifies automatic fire alarm systems as being the main cause of false alarms.  This happens when such systems are either badly maintained, or installed in a way which means they are activated by dust, steam, cooking fumes or other non-fire phenomena. As such, they are completely avoidable.   Hospitals and care premises, universities and other education establishments, and retail premises are among those experiencing the highest levels of false alarms.