Smoke detectors and time change.

.... the smoke detectors in the rest of my house are hard wired, and have never been replaced! This house was built in 1994 and I suspect that they are original.
How would you go about addressing that situation? I have been suspecting that they should be replaced, but are not giving any warnings or errant alarms.
One potential reason your smoke detectors aren't giving any warnings is they may be dead. Or the batteries may have been removed.

We have hard wired smoke detectors that have batteries. We replace the batteries every 18 months or so.

We replaced our 2 hard wired smoke detectors with Kidde brand units a few years ago. One is a smoke detector and the one near our (for use in prolonged power failures) wood stove is a combined smoke and carbon monoxide detector. They may have been original - hard to say.

Our house was built in 1987.
 
I use a BRK AC-plus-battery unit with voice. So it'll go beep-beep-beep, "Fire in the Hallway", beep-beep-beep. Wife got mad that the old one (of several in house) started chirping its end-of-life siren song and she couldn't figure out which one it was so she ran around upstairs disabling all of them. :LOL:

Hopefully the voice location thing works also when the batteries die.
 
FIRE FIRE FIRE .... FIRE FIRE FIRE Carbon monoxide detected.

That's the self test along with the screeching.

All mine are hardwired + battery. at 10 years they beep.. just buy new ones same line and they usually plug in.
or use one of the adapters.
These were the 5 I bought as replacements
The bottom one was a mistake(CO only despite description) I had to send it back 🥴 .. IIRC I also bought one at home depot (5 in house)
1773448559556.webp
 
I use a BRK AC-plus-battery unit with voice. So it'll go beep-beep-beep, "Fire in the Hallway", beep-beep-beep. Wife got mad that the old one (of several in house) started chirping its end-of-life siren song and she couldn't figure out which one it was so she ran around upstairs disabling all of them. :LOL:

Hopefully the voice location thing works also when the batteries die.
We just replace all the batteries if one dies. Saves getting woken up 2 nights/weeks/months later when the next one dies. They always die at night.
 
Is that because the sensors for smoke lose their effectiveness, or what exactly?
I know my carbon monoxide/smoke detector (which is on a lower bookshelf, since CO is heavier that air) only has a battery good for 10 years. The battery itself is not replaceable, but the recommendation is to replace the whole unit.

OTOH, the smoke detectors in the rest of my house are hard wired, and have never been replaced! This house was built in 1994 and I suspect that they are original.
How would you go about addressing that situation? I have been suspecting that they should be replaced, but are not giving any warnings or errant alarms.
Nope. Carbon monoxide is not heavier than air. It is 3% lighter and is so close it mixes freely. The reason the detectors are often close to the ground is the convenience of a wall plugin.
 
FIRE FIRE FIRE .... FIRE FIRE FIRE Carbon monoxide detected.

That's the self test along with the screeching.

All mine are hardwired + battery. at 10 years they beep.. just buy new ones same line and they usually plug in.
or use one of the adapters.
These were the 5 I bought as replacements
The bottom one was a mistake(CO only despite description) I had to send it back 🥴 .. IIRC I also bought one at home depot (5 in house)
View attachment 328166
Now add French to that and report back!
 
During the "time change" is just a date someone picked. They could have picked the Spring and Fall Equinox. Some fire departments say to check every New Years Day.
I was a resident of the Hoosier state for over fifty years. To time my spring/fall oil changes, I'd do them at race time (Indy 500) and the weekend of the Old Oaken Bucket football game (Purdue v Indiana).
 
Thanks! That connector looks pretty darn close too.

You may still have 120v power on those wires, so be careful if you do end up having to splice them. Don't want to get bit when you're not expecting it!!

As I went down this rabbit hole I found that they are now making wirelessly-interconnected smoke alarms, rather than the wire-interconnected ones. This is allowed by the newest version of UL 217. I think @97prizm was alluding to this in an earlier post. Kind of cool and I might actually do this when my smoke alarms expire (I think I have 2 more years): https://www.homedepot.com/p/X-SENSE...-Light-2-Pack-SC07-W-SC07-W/340949050#overlay

I was responding to SShooterz.

Kidde and X sense have a hardwired smoke detectors that I think now can relay to each other from what I've seen. If smoke is detected in the bathroom it can set off detectors in other rooms to alert people.
I am not sure if it was a requirement, but I bought a home built in 2007 that had these smoke detectors which were interconnected with wires. I assume that means it was part of UL 217 by that time (since electric code requires using only UL-listed devices). However it looks like the newest versions of UL 217 allow for wireless interconnection of devices (see link above)
 
We just replace all the batteries if one dies. Saves getting woken up 2 nights/weeks/months later when the next one dies. They always die at night.
The issue is when one dies, it pings one half-second ping every three minutes, or something annoying. You have to be within line of sight to figure out which one it is. I don't want to disable the entire household, either, if one goes bad.

Hopefully it blurts out "hallway low battery."

I have spare batteries, but there are other faults that can shut these things down... or make them beep.
 
The issue is when one dies, it pings one half-second ping every three minutes, or something annoying. You have to be within line of sight to figure out which one it is. I don't want to disable the entire household, either, if one goes bad.

Hopefully it blurts out "hallway low battery."

I have spare batteries, but there are other faults that can shut these things down... or make them beep.
When the battery of either one fails, they both start making noise - one beeping and the other talking. I just replace both batteries to get it over with. And it's always in the middle of the night.

Although they're the same brand they have completely different battery installations. With one you access it from the front and (in theory) don't have to take it down. I say in theory because I always have a bit of trouble figuring it out, being overhead, in the middle of the night, with a tricky "battery in place" arm that gets in the way, with small print as to which end of the batteries is positive, etc. It takes a couple of AA batteries. Sometimes it's easier to just take it down. The other one has to be taken down because battery access is from the back and it's set up so you have to remove a (hard to remove) connector that keeps the battery compartment cover closed. It takes a rectangular 9 Volt battery.

All this while they're loudly beeping and talking. And did I mention this always happens in the middle of the night.
 
Usually, pressing one of the buttons will defer the low battery and/or end of life beeps for a day or so.
 
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