How Long Does a Carbon Monoxide Detectors Last?

Source: InterNACHI Life Expectancy Chart
5-7 years
Estimated lifespan
5 years
Minimum
7 years
Maximum

Estimated Replacement Cost

$20 – $80
unit only | National average, 2025-2026

Extend Its Life

Test monthly. Replace batteries annually. Replace the entire unit every 5-7 years per manufacturer recommendation.

Category: Home Technology

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Lifespan estimates are based on industry data for typical residential installations with normal use and proper maintenance. Actual lifespan varies with installation quality, climate, usage intensity, and maintenance. These figures may differ from other sources.

Source: InterNACHI Standard Estimated Life Expectancy Chart for Homes

Page generated: 2026-03-29