Smoke Detector or Carbon Monoxide Detector - City of Fort Collins
Carbon Monoxide Safety - Metropolitan Utilities District
CPSC Warns Consumers to Immediately Stop Using HECOPRO Digital Display Carbon Monoxide Detectors Due to Failure to Alert Consumers to Deadly Carbon Monoxide; Sold on Amazon.com | CPSC.gov
Combination Smoke and Carbon Monoxide Alarm, Battery Operated | SCO5CN