EC Fan Array Retrofit with Redundancy
EC Fan Array Retrofit with Redundancy
NYC Hospital AHU Retrofit: EC Fan Array Completed Live in 6 Hours.
Design โ 9,000 CFM @ ~3โณ SP. The upgrade replaces single-point failure risk with modular redundancy and lower noise.
On October 26, our field team completed another successful EC-Motor fan array retrofit at a New York City healthcare facility in just 6 hours, replacing legacy belt-drive assemblies with direct-drive EC technology for quieter, more efficient, and more reliable operation, with zero disruption to hospital activities.
๐ง๐ถ๐บ๐ฒ๐น๐ถ๐ป๐ฒ ๐๐ถ๐ด๐ต๐น๐ถ๐ด๐ต๐๐:
Phase 1 โ Disconnected existing motors, demolished and removed blowers, housings, impellers, shafts, and bearings.
Phase 2 โ Fabricated and installed new galvanized mounting panels; fitted three (3) direct-drive EC blowers.
Phase 3 โ Installed an advanced electrical panel with three (3) overloads and Carel controller, completed full wiring and live commissioning.
๐ฆ๐๐๐๐ฒ๐บ ๐ฆ๐ฝ๐ฒ๐ฐ๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป๐:
๐น Total Airflow Capacity โ โ 9 000 CFM @ ~3โณ static pressure
๐น Configuration โ Three (3) direct-drive ebm-papst EC blowers + one extra capacity module for redundancy
๐น Controls โ Advanced panel with Carel automation and individual overload protection
๐น Components โ Backflow dampers and BFD sleeves for safe and balanced operation
๐น Integration โ Factory-balanced fan modules ensuring smooth airflow and low vibration
๐ข๐๐๐ฐ๐ผ๐บ๐ฒ:
The upgraded fan wall, delivered in partnership with BAIKAL MECHANICAL, now operates below nominal load, cutting energy use while maintaining design pressure and consistent airflow.
The result โ a modular, redundant system engineered for long-term reliability and performance across NYC healthcare infrastructure.
Read our field guide on why time offline and the stability window decide EC vs AC fan outcomes:
https://grrcooling.com/news/ec-vs-ac-fans-nyc-ahu-retrofit
Related technical resources
๐๐ฅ๐ฅ ๐๐ผ๐ผ๐น๐ถ๐ป๐ด ๐๐
๐ฝ๐ฒ๐ฟ๐๐ โ ๐ฅ๐ฒ๐น๐ถ๐ฎ๐ฏ๐น๐ฒ ๐๐ถ๐ฟ. ๐๐๐ฒ๐ฟ๐ ๐ง๐ถ๐บ๐ฒ.
NYC Hospital AHU Retrofit: EC Fan Array Completed Live in 6 Hours.
Design โ 9,000 CFM @ ~3โณ SP. The upgrade replaces single-point failure risk with modular redundancy and lower noise.
On October 26, our field team completed another successful EC-Motor fan array retrofit at a New York City healthcare facility in just 6 hours, replacing legacy belt-drive assemblies with direct-drive EC technology for quieter, more efficient, and more reliable operation, with zero disruption to hospital activities.
๐ง๐ถ๐บ๐ฒ๐น๐ถ๐ป๐ฒ ๐๐ถ๐ด๐ต๐น๐ถ๐ด๐ต๐๐:
Phase 1 โ Disconnected existing motors, demolished and removed blowers, housings, impellers, shafts, and bearings.
Phase 2 โ Fabricated and installed new galvanized mounting panels; fitted three (3) direct-drive EC blowers.
Phase 3 โ Installed an advanced electrical panel with three (3) overloads and Carel controller, completed full wiring and live commissioning.
๐ฆ๐๐๐๐ฒ๐บ ๐ฆ๐ฝ๐ฒ๐ฐ๐ถ๐ณ๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป๐:
๐น Total Airflow Capacity โ โ 9 000 CFM @ ~3โณ static pressure
๐น Configuration โ Three (3) direct-drive ebm-papst EC blowers + one extra capacity module for redundancy
๐น Controls โ Advanced panel with Carel automation and individual overload protection
๐น Components โ Backflow dampers and BFD sleeves for safe and balanced operation
๐น Integration โ Factory-balanced fan modules ensuring smooth airflow and low vibration
๐ข๐๐๐ฐ๐ผ๐บ๐ฒ:
The upgraded fan wall, delivered in partnership with BAIKAL MECHANICAL, now operates below nominal load, cutting energy use while maintaining design pressure and consistent airflow.
The result โ a modular, redundant system engineered for long-term reliability and performance across NYC healthcare infrastructure.
Read our field guide on why time offline and the stability window decide EC vs AC fan outcomes:
https://grrcooling.com/news/ec-vs-ac-fans-nyc-ahu-retrofit
Related technical resources
๐๐ฅ๐ฅ ๐๐ผ๐ผ๐น๐ถ๐ป๐ด ๐๐
๐ฝ๐ฒ๐ฟ๐๐ โ ๐ฅ๐ฒ๐น๐ถ๐ฎ๐ฏ๐น๐ฒ ๐๐ถ๐ฟ. ๐๐๐ฒ๐ฟ๐ ๐ง๐ถ๐บ๐ฒ.