eFlow USA supplied eFlow-CAR Wall Mount Fire Damper Assemblies and Wall Mount Assemblies and eFlow-CAR Ceiling Mount Assemblies to The Lotus, 729 Second Avenue, NYC, where R&S United Services, Inc. installed them in luxury rental high-rise. Designed by CetraRuddy and developed by Brause Realty, the 20-story, 157-unit building in Manhattan’s Murray Hill neighborhood includes affordable units and was completed in 2026.
Image credit: thelotusnyc.com
A Gas-Free High-Rise in Murray Hill
The Lotus stands at the corner of Second Avenue and East 39th Street (255 East 39th Street) as a 100% electric, gas-free building with rooftop solar panels and a green roof. eFlow-CARs add passive airflow control: they adjust automatically to variable duct pressures to hold a set airflow, with no electricity and no sensors.
eFlow-CARs at a Glance
- Wall Mount Assemblies: eFlow-CAR Wall Mount Fire Damper Assemblies and Wall Mount Assemblies
- Ceiling Mount Assemblies: eFlow-CAR Ceiling Mount Assemblies
- Operation: The eFlow-CAR itself requires no electricity and no sensors
Project Stakeholders
- Developer: Brause Realty
- Architect: CetraRuddy
- Installer: R&S United Services, Inc.
Why eFlow-CARs Matter for New Construction
- Wall and Ceiling Options – Assemblies for both wall and ceiling installation
- Fire Damper-Ready Assemblies – Steel enclosures designed to accommodate a fire damper and grille
- No Power Needed – No electricity or sensors required for the eFlow-CAR
Project Overview
- Address: The Lotus, 729 Second Avenue, NYC (255 East 39th Street)
- Building Type: Luxury Rental High-Rise (Includes Affordable Units)
- Number of Floors: 20
- Total Units: 157
- Completed: 2026
- Scope: New Construction
Ventilation Solutions for New Construction
eFlow USA supplies ventilation solutions for new construction, from standard constant airflow regulators to custom mounting plate and fire damper assemblies. Explore our full line of Constant Airflow Regulators for your next ground-up project.
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
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
American Aldes Alternative to Aldes CAR3, Aldes CAR3-S, Aldes CER3-R, Aldes CER3-S, Aldes CER3-S-F, Aldes CSR3-R, Aldes CSR3-S, Aldes CSR3-S-F, Aldes CEB3-WS, CEB3-WB, Aldes CEB3-CS, CEB3-CS-F, Aldes CSB3-WS, Aldes CSB3-WB, Aldes CSB3-CS, Aldes CSB3-CS-F, Aldes ZRT, equal to Aldes MR MAX Alternative to American Aldes: car ii, Equal to Nailer Constant Volume Regulator Nailer CVR CVR-SP – Constant Volume Regulator – Standard Pressure CVR-HP – Constant Volume Regulator – High Pressure CVR-LP – Constant Volume Regulator – Low Pressure CVR-GM – Constant Volume Regulator – Grille Mount CVR-FD – Constant Volume Regulator – w/ Fire Damper CVR-T – Constant Volume Regulator – Transition Collar Equal to young regulator Constant Volume Regulator CVR, young regulator CVD, CVD-S constant volume damper, CVDR: Rectangular Constant Volume Damper, 4011-CVR: Fresh Air Damper w/ a CVR, CVEF8, CVEF5, CVRF2, CVR-LP Constant Volume Regulator Low Pressure, CVR-HP Constant Volume Regulator High Pressure model cvrf5, model cvr8, cvp plus enhanced constant volume regulator, cvpfd constant volume regulator in a UL-rated assembly, cvpf5 enhanced constant volume regulator wall mount box, cvpf2 register box, cvd constant volume damper, cvdr rectangular constant volume damper, cvrf8, cvrf5, cvrf2, CVR, CVRF1, CVRF2, CVRF5, CVRF8 Alternative to greenheck ABD, ABD-FD, ABD-RB, ABD-T, ABD-Z1, ABD-Z2.
Automatic balancing damper, automatic airflow balancing, automatic balancing valve Equal to United Enertech constant volume regulator model, precision flow model, CR, CR-LP, CR-HP, CRB-10-S, CRB-10-S-CD, CRB-10-E, CRB-10-E-CB, CRB-10-E.
