First Alert 3120B vs Kidde i9050

I bought seven of these to replace the wire-connected units in my house. A few key advantages over the comparable Kidde PI2010: Most important is that the LED tells you which one sounded the alarm AND which one needs a new battery. If you have ever stood in a house with wired alarms at 2 in the freeekin' morning, trying to pinpoint the damn -bip- every minute, you will know how much swearing this feature eliminates. Trust me: This feature is a must

One in each living space, one outside of each bedroom, one in the kitchen and some in the basement, including the laundry room were essential. Don’t forget the CO2 detectors! And plug them in low because CO2 is a heavy gas.

This is a pretty good smoke detector. We ordered six of them to replace increasingly annoying, late-night-chirping, 10 year old units by another manufacturer. We wanted a dual sensor (photoelectric and ionization) detector with 10-year batteries but were unable to find any that fit the bill, and so settled for the 3120B - at least the batteries were AA instead of the more expensive 9 volt. We've had a little trouble with them - the reason for four stars instead of five

Replaced all the smoke alarms in our house. I wish there weren't exterior blinking red lights that I see when going to sleep.

Strip 1/2" off the ends of the new wires. In my case, two of the wires were pre-stripped, but the orange interconnect wire needed to be stripped. It is easier to do this before you start installing the detector on the ceiling 4. Remove the old detector from the base by rotating it counter-clockwise

I have better quality smoke & carbon monoxide alarms installed. Ipurchased these alarms to fillon the gap in coverage.

Purchased qty 6 of the BRK3120B photoelectric/Ionization, qty 2 BRK SC7010B Carbon Monoxide/Photoelectric, and Qty 1 BRK HD6135FB 135F fixed 15F rise heat detector. All of these are AC/DC battery back-up detectors that are wired off same AC circuit and all have their Orange wires all connected in Parallel as interconnected so any alarm event will sound every detectors alarm. All were tested for this interconnection and all worked as designed. They all replaced FireX G13 20 year old detectors and one older heat sensor

I wanted to order specific replacement CO detectors at the same time and take full advantage of the discount, but the website doesn't carry ALL of the Kidde products -- not-so-good.

For the price of these, you expect top quality but I've personally had better luck with cheap $15 each builder-grade USI ones over the course of several decades of home ownership.

These smoke detectors are NOT up to code & should not be sold. These smoke detectors are NOT the 10 year type & not allowed in many states. Amazon should not sell them.