Kidde CUACFEX Hardwired Smoke & Carbon Monoxide Alarm — Interconnectable, Battery Backup, Model 21033083

Dual protection you can trust

The Kidde CUACFEX Model 21033083 combines two proven sensors in one compact unit. Its photoelectric sensor responds to smoke particles from smoldering fires, while the electrochemical CO sensor tracks carbon monoxide levels. This dual detection approach helps alert you to a range of common household hazards without relying on a single sensing method.

With a hardwired 120V supply and a built‑in battery backup, this alarm is designed to stay active even when the power grid dips. The two AA batteries provide backup power during outages, helping you stay protected when you need it most.

Interconnectivity for whole‑home safety

One of the key advantages is interconnectivity. The CUACFEX can be linked with up to 24 compatible Kidde devices, so an alarm in one room triggers others across the home. This coordinated response helps ensure that occupants in different areas have a timely warning during an emergency.

Status at a glance

Three multi‑color LEDs make it easy to gauge operation at a glance. Green signals normal activity, amber indicates an operating error, and red signals a smoke, fire, or carbon monoxide event. The visual cues complement the audible alert for quick decision making.

Audible alert you can hear

When a hazard is detected, the alarm emits a robust 85‑decibel siren. The loud, attention‑grabbing sound is designed to prompt a prompt and calm response, especially in busy households where you want to be sure everyone notices the alert.

Real‑life use scenarios

Use the CUACFEX in high‑risk zones like living areas near kitchens, hallways leading to bedrooms, and basements or entryways where smoke or CO could accumulate. Its dual‑sensor design and networked behavior can offer a broader safety net without requiring complex setup.

• Dual detection technology combines smoke and CO sensing in one device.
• Hardwired power with battery backup keeps the system active during outages.
• Interconnectivity enables synchronized alerts across up to 24 devices.
• LED indicators provide quick visual status for easier monitoring.
• 85‑dB alarm delivers a strong, attention‑grabbing warning.

Installation and maintenance tips

• Mount in common areas like hallways or near bedrooms to maximize coverage.
• Test the unit regularly to ensure the audible alert and LED indicators function correctly.
• Keep the device clean and free from dust to maintain sensor sensitivity.