Case Study: How eFlow-CARs Help Buildings Comply with NYC’s Local Law 97
Local Law 97 caps carbon emissions for most buildings over 25,000 sq ft — with fines starting at $268 per excess metric ton of CO₂, and citywide penalties projected to climb past $900 million a year by 2030. Most of the conversation around compliance focuses on heat pumps, solar, and lighting retrofits. One of the most practical opportunities is often hidden inside the ductwork.
Low cost, high impact. What makes the eFlow-CAR so well-suited to the LL97 problem is the economics. Owners staring down the 2030 cliff need a portfolio of moves — and not every one can be a heat-pump retrofit or a rooftop solar array. Those carry heavy capital costs and often demand structural, electrical, and regulatory work that takes years.
CARs are passive, maintenance-free under normal conditions, and UL 2043 Classified. They drop into existing duct systems during routine maintenance windows without disrupting a working building, get dialed in on site with a screwdriver, and then run on their own. Because they cut the wasted ventilation load that drives excess emissions, they can make a meaningful contribution to a building’s compliance position — especially in buildings that have been over-ventilating for years.
Built for the Compliance Era
As Local Law 97 and similar codes spread across the country, eFlow-CARs give owners a low-cost, low-disruption way to cut wasted ventilation — one piece of a broader path to compliance.
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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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