In article
,
RicodJour wrote:



http://www.nfpa.org/assets/files//PD...mokeAlarms.pdf
From page 59 of that report:

"Aging Home Smoke Alarms


snip


*Zero* mention of any scientific evidence *whatsoever* that age alone
would render a smoke alarm inoperative. Absolutely NOTHING to suggest
the rationale behind the guideline of replacing them every ten years.