carbon monoxide leak detector

Carbon monoxide detectors are offered with several power options: replaceable 9-volt alkaline batteries, non-universal lithium batteries or 2 AA alkaline cells, sealed 10-year lithium batteries, hardwired units, and plug-in models that include battery backup.

Warranties and service lives vary by model, commonly ranging from about 5 to 10 years. Some alarms include a sealed 10-year battery that is designed to provide power for the life of the unit.

Some detectors include backlit digital displays that show temperature and current CO concentration, a Peak Level feature to record the highest measured CO, and combo models may provide voice and location alerts.

Place a carbon monoxide detector on every level of the home and in each bedroom or sleeping area. Because CO can spread throughout a house, coverage on each floor and near sleeping spaces is important.

Many units include an end-of-life warning (a specific signal or chirp) and a test/silence button for temporary hush or testing. Sealed-battery models are designed to avoid low-battery chirps because the battery is not user-replaceable for the life of the alarm.

Yes — some hardwired and combination alarms support interconnection so that when one alarm sounds, compatible alarms throughout the home will also sound. Certain models also claim compatibility with common alarm systems for whole-home alerts.