HEPA & Filter Management
Critical filtration services for healthcare and labs. Installation, certification, and DOP testing of HEPA systems.
Filtration Integrity
In critical environments, the filter is the primary defense against airborne pathogens. Integrity is non-negotiable.
Bypass
Air leaking around the filter frame defeats the HEPA rating.
Loading
Packed filters reduce airflow and strain fan motors.
Compliance
Meeting USP 797/800 or hospital isolation room standards.
Verification
Proof that the filter is performing to specification.
Filter Certification Process
We don't just change filters; we verify the seal and performance of the housing.
Housing Inspection
Checking gaskets and locking mechanisms.
- Frame integrity
- Gasket check
- Clip tension
Installation
Careful handling of delicate HEPA media.
- Media protection
- Proper orientation
- Seating check
DOP/PAO Testing
Challenging the filter with aerosol to detect leaks.
- Upstream challenge
- Downstream scan
- Leak isolation
Certification
Issuing a certification sticker and report.
- Pass/Fail log
- CFM reading
- dP reading
99.97%
Efficiency Target
Certified
Documentation
Measurable Performance Recovery
Properly managed filtration ensures regulatory compliance and protects downstream processes/patients from contamination.
Frequently Asked Questions
Does BAM perform Bag-In/Bag-Out HEPA filter changes?
Yes. BAM technicians are trained in safe-change (BIBO) procedures for hazardous exhaust systems in laboratories, pharmaceutical manufacturing, and nuclear medicine departments. We follow ANSI/ASSP Z9.5 protocols to prevent exposure to captured contaminants during filter replacement, with full PPE and continuous monitoring throughout the change.
Can a standard AHU be upgraded to HEPA filtration?
It depends on the fan's static pressure capacity. HEPA filters impose significantly higher resistance than standard MERV-rated media. BAM performs a static pressure profile and fan curve analysis to determine whether the existing motor and drive can accommodate the additional load before recommending an upgrade path.
How often do HEPA filters need to be replaced in healthcare facilities?
Replacement intervals depend on particulate loading, not calendar time. BAM monitors differential pressure across each filter bank and recommends replacement when dP reaches 80% of the manufacturer's maximum. For hospital operating rooms and isolation rooms, this is typically every 12–24 months, though high-volume facilities may require shorter intervals.
What is DOP/PAO testing and why is it required for HEPA filters?
DOP (Dioctyl Phthalate) or PAO (Polyalphaolefin) testing challenges the installed HEPA filter with a measured aerosol upstream, then scans the downstream face and frame seal for leaks. It is the only method that verifies the filter is actually performing at 99.97% efficiency in place. BAM certifies every filter installation with documented test results.
What compliance standards require HEPA filter certification in hospitals?
USP 797 and USP 800 require certified HEPA filtration for compounding pharmacies. Joint Commission and CMS Conditions of Participation mandate proper filtration in protective environment and airborne infection isolation rooms. ASHRAE 170 specifies minimum filter efficiencies by room type. BAM's certification documentation satisfies all four regulatory frameworks.
What happens if a HEPA filter fails DOP testing after installation?
BAM isolates the leak—whether in the media, gasket, or housing frame—and performs corrective action on-site. This may involve reseating the filter, replacing a damaged gasket, or repairing the housing knife-edge. We re-test after every correction until the filter passes. No filter leaves our hands without a documented passing certification.
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