A lithium-ion battery fire can create significant damage and contamination within a facility’s air handling unit (AHU). Lithium-ion battery fires produce toxic smoke, chemical residues, and fine particulates that can clog an AHU’s components, decreasing efficiency and spreading hazardous materials throughout a building. Cleaning an AHU after such an incident is essential for restoring safe, functional operations and ensuring indoor air quality.

Here are the key steps involved in cleaning a commercial AHU after a lithium-ion battery fire:

1. Shut Down the AHU and Isolate the Area

The first step is to immediately power down the AHU to prevent contaminated air from circulating through the system. Isolating the affected area and AHU will help contain toxic fumes, chemical residues, and particulates that could spread throughout the building.

2. Wear Proper PPE (Personal Protective Equipment)

Before beginning any cleaning process, it’s crucial to wear appropriate PPE to protect against exposure to hazardous chemicals and particulates. This includes respiratory protection, chemical-resistant gloves, and protective clothing. Depending on the severity of the fire, environmental air testing may be required to assess contamination levels and ensure worker safety.

3. Assess the Damage and Contamination

A detailed inspection of the AHU is necessary to determine the extent of the fire’s impact. Key areas to evaluate include filters, coils, ducts, fans, dampers, and any other components that may have been exposed to smoke, fire, or corrosive residues. Check for damage such as corrosion, melted parts, or clogged filters.

4. Replace Filters

The AHU’s filters will likely be clogged or contaminated with particles and residues from the lithium-ion battery fire. It’s important to replace all filters with new ones. Additionally, inspect filter housing for any damage that may need repair.

5. Clean and Decontaminate Coils

Coils are a critical part of the AHU that can easily become coated with smoke, soot, and toxic residues. Use coil cleaning solutions designed for fire-related contaminants to remove residue from the coil surfaces. Clean coils ensure proper airflow and energy efficiency post-fire.

6. Clean the Ductwork

The ductwork connected to the AHU must be thoroughly cleaned to remove any lingering contaminants from the fire. Mechanical or robotic duct cleaning equipment can be used to scrub the inside of the ducts and remove all particulates, smoke, and soot.

7. Clean and Inspect Fans and Motors

Fans and motors within the AHU need to be cleaned of any particulates or residue that may have settled on them during the fire. After cleaning, check all motors, belts, and fans for proper operation and replace any parts damaged by the heat or smoke.

8. Test for Residual Contaminants

Once the AHU has been cleaned, air quality tests should be performed to ensure all contaminants have been removed and the system is safe to operate. Testing for volatile organic compounds (VOCs), particulates, and chemical residues is essential to ensure indoor air quality is restored.

9. Restart the AHU

After confirming the AHU is clean and safe, it can be restarted. Monitor the unit closely during its initial operation to ensure it’s running efficiently and no lingering contamination affects its performance.

10. Perform Regular Inspections Moving Forward

Following the fire and cleaning process, it’s important to conduct more frequent inspections of the AHU to identify any long-term damage or issues that might arise from the fire. This ensures the unit remains in top condition and prevents any future problems.

Why Tyger River HVAC & Fire Can Help

Tyger River HVAC & Fire specializes in restoring and maintaining commercial HVAC systems after fire-related incidents. Our team has the expertise and equipment to safely and effectively clean AHUs after lithium-ion battery fires, ensuring that your facility’s air quality is restored and your HVAC system runs smoothly.

  • Professional Inspection: We assess the damage and contamination levels to tailor the cleaning process to your specific needs.
  • Comprehensive Cleaning: Our technicians use industry-leading cleaning solutions and techniques to restore the AHU and ductwork.
  • Safety Focused: We prioritize safety and compliance, ensuring your facility is up to standard after a fire.