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1131 N Front St, Philadelphia, PA

Improving Indoor Air Quality and Energy Efficiency: The Role of eFlow-Constant Airflow Regulators

In the heart of Philadelphia at 1131 N Front St, a new six-story, 47-unit residential project is setting a precedent for sustainable living. One of the innovative features being incorporated into this development is the installation of eFlow-Constant Airflow Regulators (CARs). These devices are poised to revolutionize the way buildings manage ventilation, offering a range of benefits that go beyond mere compliance with regulatory standards.

What are Constant Airflow Regulators (CARs)?

Constant Airflow Regulators (CARs) are devices designed to automatically maintain a consistent airflow rate in ventilation systems regardless of changes in static pressure. This ensures that each apartment or living space receives the precise amount of ventilation required, promoting optimal indoor air quality while minimizing energy waste.

Benefits of Installing eFlow-CARs in the 1131 N Front St Project

Energy Savings: Traditional ventilation systems often consume excessive energy due to inconsistent airflow rates. By installing eFlow-CARs, the project at 1131 N Front St can significantly reduce energy usage by optimizing airflow and preventing over-ventilation.

Improved Indoor Air Quality: Proper ventilation is crucial for maintaining a healthy indoor environment. eFlow-CARs help regulate airflow, ensuring that each unit receives adequate fresh air without the risk of under-ventilation (which can lead to indoor air pollutants) or over-ventilation (which wastes energy).

Cost-Effective Compliance: Many buildings must adhere to stringent ventilation standards to meet codes and regulations. eFlow-CARs provide a cost-effective solution for compliance, ensuring that the project meets ventilation requirements efficiently.

Consistency and Comfort: Residents will benefit from consistent ventilation levels throughout the building. This helps maintain a comfortable and healthy living environment, reducing potential complaints related to air quality or temperature differentials.

Easy Installation and Maintenance: eFlow-CARs are designed for straightforward installation into existing ductwork. Once installed, they require minimal maintenance, offering a hassle-free solution for long-term ventilation control.

Environmentally Friendly: By optimizing airflow and reducing energy consumption, eFlow-CARs contribute to environmental sustainability

The installation of eFlow-Constant Airflow Regulators at the 1131 N Front St development in Philadelphia represents a forward-thinking approach to building design. By prioritizing indoor air quality, energy efficiency, and compliance with ventilation standards, this project sets a new standard for sustainable urban living. As the benefits of eFlow-CARs become evident, we can expect to see more developments embracing this technology to create healthier, more energy-efficient spaces for residents and communities.


eFlow worked directly with W.F. Smith, Inc to supply CARs for this project.

Visit eflowusa.net for product information and pricing or email [email protected]



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-CARspromote 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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