Fans & Motors

FFU Noise Control: dB Specs That Actually Matter

How to specify cleanroom FFU noise—dB distance, duty-point speed, EC vs AC, filter loading, and inquiry language that prevents “quiet on paper, loud on site.”

External vs Internal Rotor Fans for Cleanroom FFUs

Compare external-rotor vs internal-rotor FFU fans—compact depth, airflow, noise, DC 310/400 platforms, and how to select by duty point rather than architecture labels.