Learn more about how Insider Reviews tests ... the smoke is too heavy. The Nest is a hardwired unit, so installation was a bit more elaborate than the other smoke detectors I tested.

On April 3, Nest Labs halted sales of the Nest Protect smoke and CO alarm and deactivated the hush feature, called the Nest Wave, over concerns that the alarm could be unintentionally deactivated.

First, it will end sales of its Nest Protect smoke detector ... and highly recommended carbon monoxide detectors, and we've done in-depth reviews of First Alert models in the past.

Fadell is the electric CEO of Nest, which makes an Internet connected thermostat and smoke/carbon monoxide detector. Prior to founding Nest, he led Apple's iPod group, and worked on the iPhone.

Smoke detectors are a critical first line of defense in home safety, alerting residents to danger before smoke and flames spread. Using loud alarms to signal trouble, traditional smoke detectors ...