First Alert has been the standard in home safety for decades. The SMI100-AC hardwired smoke detector is a workhorse, not a gimmick. It uses ionization sensing technology, which is faster at detecting fast-flaming fires than photoelectric models. For a 6-pack at this price point, you’re covering a whole floor of bedrooms and hallways without breaking the bank.

Installation is straightforward for anyone comfortable with basic electrical work. The unit wires directly into your home’s AC power, and the included 9V battery backup keeps it running during a blackout. The test button is responsive, and the alarm hits 85 decibels—loud enough to wake you from deep sleep. One honest note: ionization sensors are more prone to false alarms from kitchen smoke or steam. If you’re mounting one near a bathroom or kitchen, you may want to consider a photoelectric model for that spot instead.

These detectors are UL-listed and meet most local codes for new construction. The 6-pack saves you from buying individual units, and the hardwired interconnect means if one goes off, they all do. For a straightforward, code-compliant setup that won’t nag you with connectivity apps or smart home hubs, this is a solid, no-nonsense choice.