Case Study – HVAC Cleaning and Disinfection in Operating Theatres and Intensive Care Units

Background

Air hygiene is vital in critical medical environments such as operating theatres and intensive care units (ICUs). Contamination in HVAC systems can endanger patients with vulnerable immune systems and compromise surgical safety.

At a major hospital, inspections revealed severe contamination of the HVAC systems supplying operating theatres and ICUs. Laboratory tests showed high levels of particulates and microbial presence, creating an urgent need for remediation and disinfection.

The challenge

The key challenge was to ensure accurate, verifiable results. In this sector, many companies rely on in-house, low-grade monitoring devices, producing questionable “before and after” data that exaggerates contamination initially and presents unrealistic cleanliness afterwards. Such practices undermine credibility.

BSM Tech follows NADCA standards exclusively and partners with an independent accredited laboratory for all pre- and post-cleaning analyses. This guarantees that results cannot be manipulated and that compliance is objectively verified.

The remediation process

The process began with laboratory testing conducted by an independent body. Samples were collected from operating theatres and ICUs, establishing baseline contamination levels.

BSM Tech applied NADCA-certified techniques, including high-powered negative pressure machines, HEPA filtration, and medical-grade disinfection methods. Contaminants, mold, and microbial colonies were removed, and HVAC systems were fully sanitized.

After the intervention, the same independent laboratory carried out follow-up testing. Results demonstrated a drastic improvement and full compliance with international air hygiene standards for high-risk medical environments.

The outcome

The hospital received a detailed technical report, complete with NADCA certification and independent laboratory results. Operating theatres and ICUs were declared fully safe for use, with objective proof of air quality improvement.

By ensuring third-party validation, BSM Tech distinguished itself from competitors who rely on internal, unverified monitoring. This transparency built trust with hospital management and regulatory bodies.

Conclusion

HVAC disinfection in operating theatres and ICUs is not just maintenance but a life-critical task. With NADCA certification and independent laboratory verification before and after cleaning, BSM Tech delivers reliable, uncompromised results that safeguard both patients and medical staff.