Silent CNC Fit Testing for Occupational Health: OHD AeroFit

3 March 2026

A Quieter Approach to CNC Fit Testing

In many occupational health and industrial settings, CNC fit testing is essential for maintaining respiratory protection programs. Yet traditional CNC systems often add noise to already demanding environments, contributing to fatigue, distraction, and operational strain during long testing days.

The OHD AeroFit® addresses this challenge directly. Its silent operation provides a noticeably quieter testing experience, creating conditions that support clinical focus and worker comfort. With reduced background noise, clinicians can concentrate on technique, timing, and documentation, while workers benefit from a calmer, less stressful session.

Silence becomes more than a comfort feature—it becomes a practical advantage for programs that depend on accuracy, consistency, and efficiency.

Workflow Efficiency Supported by Silent Operation

Fit testing workflows can be intensive, particularly in programs managing large groups, rotating shifts, or mobile clinics. Silent CNC operation contributes meaningfully to a smoother workflow by:

Reducing environmental fatigue during extended testing blocks
Supporting worker concentration during fit‑testing exercises
Maintaining a calm atmosphere even in compact rooms or mobile setups
Enabling clearer communication between clinician and worker

Combined with AeroFit’s fast setup and efficient test cycle, silent operation strengthens the overall clinical workflow.

Precision Through Quantitative CNC Technology

AeroFit applies a quantitative CNC method to assess respirator leakage through particle concentration analysis—an established approach for generating objective, repeatable fit‑factor results.

Core precision‑focused capabilities include:

Objective fit‑factor measurements across respirator types, including N95 and elastomeric models
Fit‑factor ranges aligned with clinical decision‑making and documentation needs
NIST‑traceable calibration, supporting consistent performance and quality assurance

Silent operation further supports measurement integrity by reducing distractions that may influence breathing patterns, posture, or timing during test exercises.

AeroFit Compared to Other CNC/APC Technologies

AeroFit offers several operational advantages over other CNC/APC systems:

Silent operation, reducing fatigue and improving communication during testing
No consumables required, lowering cost and simplifying maintenance
Unlimited data storage, supporting continuity across high‑volume and multi‑site programs
Preloaded respirator lists, reducing setup time and supporting standardized protocols
Optional battery operation, adding flexibility for mobile or remote fit‑testing setups

Together, these features make AeroFit well suited for industrial and occupational health programs that conduct frequent, high‑volume, or multi‑shift respirator fit testing.

View AeroFit Comparison Table

A Better Testing Experience for Clinicians and Workers

The shift to silent CNC operation changes how fit testing feels for everyone involved. Clinicians benefit from fewer distractions and a lower cognitive load throughout the day. Workers experience a calmer environment that supports clear communication and confidence during the test.
This approach aligns with a clinician‑first, worker‑first philosophy that prioritizes safety, comfort, and long‑term program quality.

The OHD AeroFit brings meaningful refinement to CNC fit testing by pairing quantitative measurement with a silent, comfortable operating experience. This combination supports workflow efficiency, compliance, and clinical accuracy—while offering a quieter, more sustainable environment for both clinicians and the workers they support.

For occupational health teams seeking a precise, efficient, and reliable CNC fit‑testing solution, AeroFit offers a strong foundation for long‑term respiratory protection program success.

Interested in the OHD AeroFit?

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For help with respirator fit testing, certified equipment, or device calibration, our experts are here to assist you.

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