Kidde 21008872 Battery Operated Carbon Monoxide Alarm

Product Description

The KIDDE 21008872 is a battery-operated carbon monoxide alarm designed for continuous CO level monitoring in residential living areas. Powered by three AA batteries, the unit delivers uninterrupted protection during power outages without relying on AC power. A red LED pulses and a loud alarm pattern activates when dangerous CO concentrations are detected. A green LED flashes every 30 seconds to confirm normal operation. The alarm includes a battery lockout system that deters closing the battery compartment without installing batteries first, and a slide-out door gives immediate access when battery replacement is needed. Licensed HVAC technicians, electricians, and general contractors typically handle installation during new construction or renovation work.

This alarm is suited for residential applications including bedrooms, hallways, and common living areas wherever CO detection coverage is required. The unit is designed for easy wall or shelf placement in all interior living spaces. It ships with three AA batteries included, so the alarm is ready for immediate deployment. A built-in seven-year end-of-life alert notifies the installer or occupant when it is time to replace the unit. A quick reference guide is printed on the inside cover of the battery door for field reference.

Key Features

• Battery-operated design maintains CO detection during power outages
• Battery lockout system prevents closing the compartment without installed batteries
• Slide-out battery door provides quick access for battery replacement
• Test/reset button verifies proper unit operation and clears alarm state
• Red LED pulse and audible alarm pattern activate at dangerous CO levels
• Seven-year end-of-life alert prompts timely unit replacement

Compatibility

Designed as an OEM-style battery-operated CO alarm suitable for residential single-family and multi-unit living area installations.

Installation Notes

Installation is typically performed by a licensed electrician, HVAC technician, or qualified contractor. Power down or isolate any adjacent electrical circuits before beginning work in the installation area. Follow local building codes and the manufacturer instructions included with the unit regarding placement height and proximity to fuel-burning appliances. Do not install in locations subject to extreme temperature, high humidity, or direct airflow from vents, as these conditions can affect sensor performance.

Technical Specifications

• Power Source: 3 AA batteries (included)
• Packaged Depth: 1.5 inches
• Packaged Width: 4.5 inches
• Packaged Height: 2.75 inches
• Warranty: Five-year limited manufacturer warranty

Standard Information

• Brand: KIDDE
• Manufacturer Part Number: 21008872