eFlow USA successfully implemented its eFlow-Constant Airflow Regulator (CAR) technology at 532 Neptune Avenue, a 758,000-square-foot residential development comprising three high-rise towers in Brooklyn, New York. The project includes 499 rental apartments—30% designated as affordable housing.
The project presented a significant ventilation challenge typical of high-rise construction: maintaining consistent indoor air quality and energy efficiency across buildings rising up to 20 stories while overcoming extreme stack-effect pressure variations. As Lead Engineer at TRV Mechanical , Tarang Patel led the development of the project’s ventilation strategy, identifying eFlow’s Constant Airflow Regulator technology as the optimal solution to address these systemic airflow imbalances and established a new standard for sustainable high-rise ventilation in the New York metropolitan area.
Rather than relying on complex, energy-intensive electronic control systems, Tarang Patel engineered an advanced passive design using hundreds of factory-calibrated eFlow-CAR units. This approach created a self-balancing ventilation network capable of maintaining precise and balanced exhaust airflow regardless of building height or external weather conditions.
To meet the project’s high-density ventilation requirements, TRV Mechanical installed 4-inch eFlow-CARs set to 25 CFM and 5-inch eFlow-CARs set to 65 CFM throughout kitchens and bathrooms in all three towers. Product supply was coordinated through New Jersey Air Products. The resulting system ensures consistent performance, reduced maintenance complexity, and long-term operational reliability.
This passive engineering framework delivered a documented 25% reduction in HVAC-related energy waste and supports compliance with New York City’s Local Law 97 carbon emission requirements. The project demonstrates how thoughtful mechanical design can mitigate over-ventilation while advancing sustainable urban development.
The collaboration at 532 Neptune Avenue highlights the essential role that engineers like Tarang Patel play in the global push for green infrastructure. Their work at 532 Neptune Avenue serves as an authoritative case study for the entire HVAC industry.
Neptune Towers, 532 Neptune Avenue Brooklyn, NY – eFlow-CAR
Picture credit to: https://newyorkyimby.com/
Three Towers. One Unified Airflow Strategy.
Neptune Towers brings energy-efficient, code-compliant ventilation to one of Brooklyn’s largest ongoing multifamily developments.
eFlow-CARs provide passive, automatic airflow regulation, reducing energy costs and promoting high indoor air quality.
Key Industry Leaders Behind the Project:
▪️ Architect: Zproekt Architecture
▪️ General Contractor: Rybak Development
▪️ Structural Engineer: DeSimone Consulting Engineers
▪️ Developers: Cammeby’s International Group, Rybak Development
▪️ Installer: TRV Mechanical
▪️ Product Rep: New Jersey Air Products
Why eFlow-CARs Matter:
▪️ Scalable Airflow Control
▪️ Reliable Performance
▪️ Affordable Housing Integration
Take Control of Ventilation Performance Today with eFlow USA
From high-rise residential buildings to affordable housing developments, eFlow USA delivers high-performance ventilation solutions to improve air quality and energy efficiency.
🌐 Website: eflowusa.net
🛒 Order Online: eflowshop.net
📧 Email: sales@eflowusa.net
📞 Call: 1-833-356-9872
Picture credit to: https://newyorkyimby.com/
eFlow-CAR FACTS
eFlow-CAR is a simple solution to balancing ventilation systems. Constant Airflow Regulator is a device that automatically regulates airflows in ventilation systems to constant levels. The passive control element responds to duct pressure, and requires no electric sensors, pneumatic sensors or controls. eFlow-CARs promote high indoor air quality and energy savings.
- UL 2043 Classified
- Composed of fire resistant UL 94 ABS plastic
- Diameters offered: 3”, 4″, 5”, 6”, 8″, 10″
- Operating Pressure Range: 0.08 to 2.4 in w.g. (20-600Pa)
- Airflow settings: 15-765 CFM
- Temperature Limits: -22° to 140°F (-30° to 60°C)
- Suitable for both supply and exhaust applications
- No external power supply needed
- Field Adjustable CFM set point
- Capable of maintaining constant airflow within +- 5% for nominal airflow throughout the target operating pressure range of 0.08 to 2.4 in.
- Standard for Energy Efficient Compliance
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