"Brian Gaff" wrote in message
news
No but one added thing to take into account. Most people tend to site them
on the ceiling. This is not a good idea if you have to climb to change a
battery or stop it sounding cos you burned the toast. I have one half way
up the stairs which may mean it gets more toast falls alarms but is easy
to shut up without getting a ladder or falling.

Corse a well designed one would have a remote
or be able to be turned off using your phone.

"Peter Parry" wrote in message
...
On Mon, 17 Sep 2018 21:12:48 +0100, "Jim GM4DHJ ..."
wrote:

are optical smoke alarms better for less false alarms than ionising
ones...in practice I mean ? .....

No. Neither have significant false alarm rates. Both however can
suffer nuisance alarms, these are not false alarms but real alarms
produced by non- dangerous activities such as steam from a bathroom
or overheated toast.

Optical suffer more from steam, ionisation from the combustion
products of things like singed toast. Used and sited properly neither
should have a significant nuisance alarm rate (unless of course you
are prone to overheating toast with the toaster is in the bathroom
sink while you are taking a shower).