Guides

The best garage CO detectors for 2026 — scored picks for repair bays, parking and fleet garages, plus the right CO alarm for an attached home garage.

The best carbon monoxide detector of 2026, ranked across residential UL 2034 alarms (Kidde Pro Series 900-0146, First Alert CO710, X-Sense CO03D), smart and hardwired combos (Nest Protect, SC9120B), industrial wearables (BW Solo CO), and low-level / handheld picks (FD-90A, Klein ET110).