New York has been mandating these "10 year" smoke detectors for a couple of years now (there was a phase in period to allow vendors to sell off the older ones).
Don't know how many other places have done this:
.. or the hard-wired units. Which I always thought were inferior - because - during power outages - people will be using their <more dangerous> portable heaters & such .. John T.
Our hard-wire detectors all have 9 volt backup batteries. They'll chirp if the battery is dead or removed.
The dual sensor units are Ionization & Photoelectric in one. No CO sensor. I always kept a CO detector separate from Smoke detectors. I have a First Alert CO detector w/digital readout that plugs into the wall and has a battery backup.
But they were 40 years ago.
On Tue, 01 Dec 2020 14:54:39 -0600, Jim Joyce posted for all of us to digest...
It's all Greek to me.
Its easy to forget and just leave the detector in place.
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