Carbon monoxide alarm calls are often treated as routine responses, but they require the same disciplined size-up, hazard recognition, and risk management mindset as any other incident. A thermal imaging camera (TIC) provides firefighters with an additional layer of situational awareness by helping crews rapidly identify abnormal heat conditions, hidden hazards, and potential ignition sources that may be contributing to a CO event.

Using a TIC during CO investigations can improve operational efficiency, firefighter safety, and decision-making while also supporting documentation and homeowner education.

1. Identify Overheated Appliances

Many carbon monoxide incidents originate from malfunctioning appliances such as furnaces, boilers, water heaters, or stoves. A TIC allows crews to quickly identify abnormal heat patterns that may indicate:

Failing motors
Cracked or failing heat exchangers
Blocked exhaust systems
Overfiring burners
Overheating electrical components

Early identification can help isolate the source faster and reduce the risk of escalation.

2. Scan Flues, Chimneys, and Vent Systems

Blocked or damaged venting systems are a common cause of CO buildup inside structures. A TIC can help firefighters identify:

Overheated vent piping
Cold spots that may indicate blockages or restricted flow
Heat transfer where it should not be occurring
Improper venting conditions around chimneys or exhaust systems

This allows crews to better assess whether combustion gases are venting properly.

3. Detect Hidden Fire Conditions

Some CO alarm activations may be the first indication of a concealed fire or equipment failure. A TIC can assist in locating:

Smoldering electrical fires
Overheated wiring or outlets
Appliance malfunctions
Hidden hot spots inside walls, ceilings, or floors

This helps crews rule out or identify hidden fire extension before conditions worsen.

4. Improve Size-Up in Low-Visibility Environments

CO calls frequently occur at night, in basements, utility rooms, or other poorly lit areas. A TIC enhances operational awareness by providing:

Faster and safer navigation
Improved hazard recognition
Better visibility around obstacles or trip hazards
More accurate assessment of environmental conditions

This improves both efficiency and crew safety during the investigation.

5. Check for Heat Signatures Around Generators

Portable generators remain a major source of dangerous CO incidents. A TIC can help firefighters identify:

Improper generator placement
Running equipment hidden behind structures or inside garages
Overheating engines or exhaust systems
Heat signatures indicating recently operated equipment

This can quickly direct crews to a potential source of the CO problem.

6. Confirm or Rule Out Active Heating Sources

In some cases, CO alarms activate because of common household heating issues. A TIC can help determine whether appliances were recently operating, including:

Ovens or stovetops left on
Overheating space heaters
Improperly used fireplaces
Recently operated fuel-burning appliances

This helps narrow the investigation and identify potential contributing factors.

7. Enhance Firefighter Safety

CO alarm calls can appear routine, increasing the risk of complacency. Incorporating a TIC into the response helps improve overall firefighter safety by:

Increasing situational awareness
Identifying unseen heat sources or ignition hazards
Detecting abnormal conditions before they escalate
Reducing the likelihood of crews walking into hidden hazards

Using available technology reinforces a proactive rather than reactive approach.

8. Support Documentation and Customer Education

A TIC can also assist with post-incident communication and documentation. Visual findings help:

Explain malfunctioning appliances to occupants
Support evacuation or ventilation recommendations
Reinforce the need for utility or HVAC evaluation
Build trust through transparent communication

Providing residents with a visual understanding of the issue often improves compliance with safety recommendations.

Carbon monoxide alarm calls should never be viewed as “routine.” A thermal imaging camera enhances the investigative process by helping crews identify hidden hazards, malfunctioning appliances, abnormal heat signatures, and potential fire conditions more efficiently and safely. From improving low-visibility size-up to supporting firefighter safety and homeowner education, the TIC serves as a valuable tool that strengthens situational awareness and operational decision-making on every CO response.

Until next time, work hard, stay safe & live inspired.