What Is a Combustion Analyzer Used for After Fire Damage?
Last updated October 25, 2026
The short answer
Detecting Invisible Gas Hazards
After a fire, the air can contain hazardous gases you cannot see or smell. A combustion analyzer is a specialized meter that detects these gases. It primarily measures carbon monoxide, which is a poisonous byproduct of incomplete combustion. It also checks for low oxygen levels and the presence of other combustible gases.
These readings are critical for safety. Before any cleanup begins, the pros need to know if the atmosphere is breathable. High levels of carbon monoxide can cause illness or be fatal in enclosed spaces. The analyzer provides an objective measurement to guide all subsequent safety decisions.
How the Analysis Guides Restoration
The data from the combustion analyzer directly informs the restoration plan. If dangerous gases are present, the pros must ventilate the area thoroughly before starting work. This may involve setting up powerful air movers and negative air machines to exchange the contaminated indoor air with fresh outdoor air.
Only after air quality reaches safe levels can the detailed cleaning and drying process begin. The analyzer might be used again to confirm the environment is safe for occupants to return. This tool is a fundamental part of creating a secure workspace for everyone involved in the recovery.
Key Measurements Taken by the Device
A combustion analyzer takes several specific measurements. The most common is the concentration of carbon monoxide, measured in parts per million. It also measures the percentage of oxygen in the air; levels below 19.5 percent are considered oxygen-deficient and dangerous.
Many devices also measure temperature and atmospheric pressure. Some advanced models can detect multiple gases, including carbon dioxide and nitrogen oxides. Each reading helps paint a complete picture of the post-fire environment's chemical safety profile.
- Carbon Monoxide (CO) Levels
- Oxygen (O2) Concentration
- Ambient Air Temperature
- Atmospheric Pressure
- Combustible Gas Presence
- Efficiency of Combustion (if applicable)
Safety for Occupants and Workers
The primary purpose of this tool is to protect people. Homeowners and business owners should never assume the air is safe after a fire is out. Invisible gases can linger for hours or days, especially in well-sealed modern buildings. Relying on smell or appearance is not a reliable safety check.
For water damage and fire restoration pros working daily in these environments, ongoing exposure is a serious risk. Regular air monitoring with a combustion analyzer is a standard safety protocol. It ensures that workers are not subjected to hazardous conditions during the lengthy cleanup and reconstruction phases.
When to Call for Professional Help
If you have experienced a fire, your first call should be to the fire department. After the fire is extinguished and the structure is released to you, contact local water and fire damage restoration pros. They have the training and equipment, like combustion analyzers, to assess hidden dangers safely.
Do not attempt to re-enter or clean the property until a professional evaluation is complete. Soot and chemical residues can be toxic, and structural integrity may be compromised. The pros follow established safety procedures to mitigate all these risks systematically.
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Call Now (702) 878-3744Frequently asked questions
Can I use a carbon monoxide detector instead of an analyzer?
A home CO detector is for general alerts, not precise measurement. After a fire, professionals need an analyzer to get exact gas concentrations and oxygen levels to plan safe ventilation and work procedures. The detector is not a substitute.
Who operates the combustion analyzer?
Trained restoration professionals operate this equipment. They know how to calibrate the device, interpret the readings correctly, and determine the necessary safety actions. It is part of their technical skill set for post-fire inspections.
Does insurance cover this type of air testing?
Testing is often part of the overall damage assessment and mitigation process. Policies vary, and your insurer decides what is covered. Discuss the scope of work with your insurance adjuster and the local pros.
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