AHU & Coil Restoration
Deep steam cleaning and restoration of air handling units to improve static pressure, indoor air quality, and thermal transfer.
Airflow & Hygiene
Biofilm on coils acts as an insulator and restricts airflow. We remove the burden from your fans and the contaminants from your airstream.
Static Pressure
High pressure drop across the coil bank indicates deep fouling.
Biological Growth
Mold and biofilm on coils release spores into the supply air.
Corroded Drain Pans
Standing water and rust create a breeding ground for Legionella.
Fan Energy
Fans run at higher RPMs to overcome resistance, wasting energy.
AHU Hygiene Protocol
We use high-temperature steam and enzyme-based cleaners to penetrate deep into coil fins without damaging them.
Containment Setup
Isolating the AHU to prevent contaminant migration during cleaning.
- Negative air pressure
- Supply duct sealing
- HEPA filtration
Coil Steam Cleaning
Low-pressure, high-temperature steam cleaning of coil faces.
- Fin-safe pressure
- Enzyme foaming
- Deep penetration
Surface Sanitization
Cleaning and disinfecting blower housings, plenums, and dampers.
- EPA-registered biocides
- Rust remediation
- Drain pan clearing
Pan Refurbishment
Coating rusted drain pans with a flexible, waterproof membrane.
- Pan-crete / Epoxy
- Self-leveling application
- Leak proofing
10-15%
Fan Energy Reduction
Immediate
IAQ Improvement
Measurable Performance Recovery
Clean coils transfer heat more effectively and allow fans to run at lower speeds, directly reducing HVAC energy spend.
Frequently Asked Questions
Does AHU coil restoration require a total system shutdown?
The individual air handling unit must be isolated, but adjacent units can continue operating. BAM establishes negative air containment within the AHU to prevent contaminant migration into occupied spaces. For hospitals, we coordinate with infection control to schedule work during lowest-occupancy windows.
Will steam cleaning damage aluminum coil fins?
No. BAM uses calibrated low-pressure, high-temperature steam with fin-safe spray angles that penetrate biofilm without bending or flattening delicate aluminum fins. This method removes organic fouling that chemical rinses leave behind, restoring thermal transfer capacity to near-original specifications.
How does a dirty AHU coil affect building energy costs?
Biofilm on coil surfaces acts as an insulator and restricts airflow, forcing fans to run at higher speeds and compressors to work harder. This can increase HVAC energy spend by 10–15%. BAM's deep coil cleaning restores static pressure drop to design levels, immediately reducing fan energy consumption.
Can a corroded AHU drain pan be repaired instead of replaced?
Yes. BAM resurfaces rusted or leaking condensate pans with a self-leveling, waterproof epoxy membrane that creates a new monolithic basin liner. This eliminates standing water that harbors Legionella and prevents costly water damage to ceilings below without the lead time and expense of OEM pan replacement.
What contaminants does AHU restoration remove from the airstream?
BAM's protocol removes mold, biofilm, bacteria, dust, and construction debris from coils, blower housings, plenums, and drain pans. We use EPA-registered biocides for surface sanitization after physical removal. Post-cleaning verification confirms compliance with ASHRAE 62.1 ventilation and NADCA cleanliness standards.
How often should commercial air handling units be deep cleaned?
Most institutional AHUs require deep cleaning every 3–5 years, though healthcare facilities and high-humidity environments may need shorter intervals. BAM performs a visual and static pressure assessment to determine the right schedule. Ignoring deep cleaning risks biological amplification that standard filter changes cannot address.
Ready to Restore Performance?
Our restoration engineers are ready to evaluate your facility and provide a documented assessment.
Request a Site Visit