Customer Reviews For The First Alert Hardwired Inter-connected Smoke Alarm, 9120

The First Alert 9120 is the gold standard for reliable, hardwired smoke detection. I recently replaced several units in my home that were nearly 20 years old, and the process couldn't have been easier. Because First Alert has maintained consistent design standards, the new 9120 units snapped right into my existing mounting brackets and used the same wiring harness. What I expected to be an afternoon-long project was finished in under twenty minutes.

I purchased 8 of these to swap out the existing First Alert smoke detectors we got with the house 15+ years ago. The connections were the same so the install was less than 2 minutes each. Same size also.

I was able to replace the discontinued item with this one. For someone who is not familiar with doing this type of stuff I was happy I was able to do it without asking for help.

Simple to install. Bought to replace SA86??, it was probably 20 years old.

very quick service, thought I was ordering a battery backup one, but they are working. thanks

it showed up on time, so far, so good. We will always use First Alert.

Our smoke alarm had lived a long and useful life but when it came time to replace it, I couldn't find the most recent/comparable model. I called First Alert and the rep was very helpful and professional. Based on his recommendation, I purchased a new smoke alarm which is working perfectly!!!

the smoke alarms came promptly and were the ones I ordered. Thank you for prompt service.