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200 East 34th Street, New York, NY

We are thrilled to unveil another project, showcasing the e2Flow® PLUS system – a revolutionary alternative solution to ZRT. This pioneering system has been meticulously designed to offer sustainable, flexible, and efficient airflow balancing at a cost-effective price point. With state-of-the-art technology and an unwavering commitment to excellence, this project marks a significant milestone for both our company and the industry as a whole.

The construction of a 34-story residential tower at 200 East 34th Street, NYC, has now reached completion. Boasting a range of cutting-edge features, including eFlow-CARs and the innovative e2Flow PLUS system.

e2Flow PLUS system installed allows for controlled airflow at minimum 50 CFM and on demand maximum 450 CFM. eFlow-CARs 5″  at 30 CFM were utilized for all exhaust applications.

This impressive building was designed by CetraRuddy Architecture and developed by 200 East 34th LLC. With 144 high-end condominium units spanning across studio to two-bedroom layouts, the 388-foot-tall structure stands as a true architectural masterpiece. The property was expertly constructed by Noble Construction Group. AKF Group  is the MEP engineer on this project.

eFlow collaborated directly with the mechanical contractor to provide guidance on product selection and product approvals. Installation of eFlow-Products was undertaken by L & M Air Inc.

Our unwavering commitment to pushing the limits of what’s possible in our field is exemplified by this project, and we firmly believe that it will leave a lasting impact on the industry. We warmly invite you to discover more about the e2Flow® PLUS system, our latest ZRT alternative solution.

Photo credit CetraRuddy Architecture

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-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


e2Flow® PLUS FACTS (ZRT Alternative Solution)

e2Flow® PLUS system is designed to introduce flexibility and demand control to central ventilation systems. It is used to achieve a combination of low-flow continuous indoor air quality ventilation and on-demand high-flow spot ventilation using the same central fan system. This high efficiency ventilation system promotes high indoor air quality, energy savings and reduces operating costs. This system is used in both large and small systems. Unlike any other product on the market, e2Flow® PLUS offers flexibility in engineering design where system’s components are tailored to the project’s requirements. Combination of two eFlow devices are used to achieve controlled minimum and maximum airflow. e2Flow® PLUS offers simple in-line installation where no mounting hardware or additional support is required.

e2Flow® PLUS is ideal for bathroom, kitchen exhaust, makeup air, new constructions, retrofits and so much more.

  • Achieve a combination of low-flow continues ventilation and on-demand high-flow spot ventilation
  • Mix & Match eFlow products for optimal solution
  • Easy in-line installation
  • No mounting hardware or additional support required
  • Low installation cost
  • Refer to schematic for installation illustration








Supprier to American Aldes assemblies: ccar-ii, car-iia, ccar-ii-lp, car-ii-hp, car-fea-ii, car-fsa-ii, cer-s-ii, cer-r-ii, cer-lp-sii, cer-lp-r-ii, cer-s-iir, cer-lp-s-iir, cer-fea-ii, cer-fea-iir, cer-lp-fea-ii, cer-lp-fea-iir, csr-s-ii, csr-r-ii, csr-lp-s-ii, csr-lp-r-ii, csr-s-iir, csr-lp-s-iir, csr-fsa-ii, csr-fsa-iir, csr-lp-fsa-ii, csr-lp-fsa-iir, cerb-ws-ii, cerb-wb-ii, cerb-cs-ii, cerb-cfs-ii, cerb-cfb-ii, csrb-ws-ii, csrb-wb-ii, csrb-cs-ii, csrb-cfs-ii, csrb-cfb-ii, Constant Exhaust Registers, Constant Supply Registers, Constant Exhaust Register Box, Constant Supply Register Box, zone register terminals, zrt, zrt-s, zrt-fr, zrt-frs, zrt-w, zrt-ws, zrt-w-fr, zrt-w-frs, zrt-il, zrt-pdil, zrt-pdil-hp, zrt-3pdil, zrt-3pdil-hp, zrt-sdil, zrt-sdil-1-hp

Aldes, American Aldes, car ii, car iia, car ii lp, car ii hp, car fea ii, car fsa ii, cer s ii, cer r ii, cer lp sii, cer lp r ii, cer s iir, cer lp s iir, cer fea ii, cer fea iir, cer lp fea ii, cer lp fea iir, csr s ii, csr r ii, csr lp s ii, csr lp r ii, csr s iir, csr lp s iir, csr fsa ii, csr fsa iir, csr lp fsa ii, csr lp fsa iir, cerb ws ii, cerb wb ii, cerb cs ii, cerb cfs ii, cerb cfb ii, csrb ws ii, csrb wb ii, csrb cs ii, csrb cfs ii, csrb cfb ii, zrt s, zrt fr, zrt frs, zrt w, zrt ws, zrt w fr, zrt w frs, zrt il, zrt pdil, zrt pdil hp, zrt 3pdil, zrt 3pdil hp, zrt sdil, zrt sdil 1 hp

United enertech precision flow system crb-10-s, crb 10 s, crb-10-e, crb 10 e, crb-10-e-cd, crb 10 e cd, crb-10-s-cd, crb 10 s cd, crb-10-e-cd, crb 10 e cd, united enertech precision flow model cr, precision flow model cr-lp, precision flow model cr-hp, young regulator cvr constant volume regulator ,model cvrf5, model cvr8, cvp plus enh

nailor constant volume regulator CVR-SP, CVR-LP, CVR-HP, CVR-T, CVR-GM, CVR-FD

eFlow CAR can be used as equivalent to aldes CAR3, CAR3-s, CER3-S, CER3-R, CER3-S-F, CSR3-S, CSR3-R, CSR3-S-F, CEB3-WS, CEB3-WB, CEB3-CS, CEB3-CS-F, CSB3-WS, CSB3-WB, CSB3-CS, CSB3-CS-F




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