EC fan array installed inside a hospital air handling unit during a live AHU retrofit in New York City.

Hospital AHU retrofit in New York City

Oct 26, 2025

On October 26, our crew completed another live hospital AHU retrofit in New York City, upgrading to a modular EC fan array for quieter, more efficient airflow and built-in redundancy.
Full time-lapse video with performance data and system highlights cis available on GRR's YouTube channel>

See our NYC retrofit case studies>