4 ms·
The ones I've had, even when you hit the "hush" button, it still makes a loud chirp every 60 seconds to let you know that it's hushed, but still detects smoke.
by JeffL 13y ago
The ones I've had, even when you hit the "hush" button, it still makes a loud chirp every 60 seconds to let you know that it's hushed, but still detects smoke. This chirp scares the crap out of my dog.
- eli 13y agoFair enough. Offtopic, but I used to rent a room in a huge old row house here in DC with a fancy "networked" fire alarm system. When one goes off, they all go off. You could turn it off by holding a button on the alarm... but it had to be the alarm that went off first. Makes sense from a design standpoint, but as far as I know there was no immediate way to determine which alarm that was, so there was a lot of running around with a broomstick (tall ceilings) pushing buttons.
- ilyanep 13y agoIn the college dorm I lived in, there was one networked system for the entire building (which was four ~80-bed dorms). It was so ridiculous that most people just stopped leaving when a fire alarm went off (the buildings are made of concrete and other not really flammable materials because it's Southern California) but the administration claimed they couldn't turn down the sensitivity.
- giardini 13y agoMost of these also have dual battery/120v power. So there are usually 3 wires coming into the alarm: two (black + white) for 120v power and the third (red) for 9v signal. The usual way around this feature/problem is to disable (disconnect) the signal line at each alarm.
- ctdonath 13y agoMore than once my dog has tried crawling thru the bathroom wall to escape the noise. False alarms got bad enough when I was learning to cook a steak right that just the sight of the cast-iron frying pan would send him into hiding. Yes, majority of fire deaths involve a non-working detector. Considering how severely & irrationally people react to false positives, anything that calms people into not permanently disabling the device is good.