On Fri, 25 May 2012 13:41:40 -0700 (PDT), Owain wrote:

Summary at
http://www.fire-detect.co.uk/standar...at-alarms.html

System Grades

Six different grades of fire detection systems are being defined.
Generally speaking,
snip

Good informative post, one for the wiki if the information isn't
already there.

--
Cheers
Dave.