Base Building

1901 L St, NW

1024 802 Engenium Group

1901 L St. NW

Engenium Group provided MEP services to develop the existing “B Class” commercial office building into a “Trophy Class” building, including addition of three new levels and all new exterior facades, MEP systems, roof terrace, elevators, lobby, streetscape, amenities and reconfigured central core and restrooms. The renovated building totals 261,500 SF (a 65,000 SF expansion).

1901 L Street is the first WELL(v1) building in DC certified by the International WELL Building Institute (IWBI).

Project Website

  • Mechanical
    • New DOAS Air Handling Units with sensible and latent energy recovery, low-temperature discharge, and fan array supply and exhaust fans with independent variable frequency drives
    • DOAS fan-powered terminal units with sensible only hydronic cooling, hydronic heating, and electronically commutated fan motors
    • Centrifugal Chillers with low-temperature chilled water, magnetic levitation compressors, and variable capacity with low turndown
    • Condensing Boilers with low design return temperatures for max efficiency
  • Electrical
    • Complete replacement of electrical distribution
    • New 4,000 Amp service
    • New 2,500 Amp bus duct riser
    • New branch distribution panels
    • LED lighting in common areas with programmable multizone dimming system
  • Plumbing
    • Extend new domestic water distribution, sanitary waste, and vent piping to devices within the building core
    • New domestic hot water heater as needed
    • Demolition and replacement of existing base building plumbing systems
    • Design and layout the storm water system including roof drains, and distribution within the building

1333 New Hampshire Ave.

1024 494 Engenium Group

                                                                                    Project Website

1333 New Hampshire Ave.

We provided Mechanical, Electrical and Plumbing engineering services to support select renovations and upgrades, including lobby, storefront, facade, rooftop amenity spaces, elevators and garage elevator lobbies, new fitness center, and restroom renovations.
Scope also included design of white-box spaces for retail and office on lower level, main level, and floors 2-6.

  • Mechanical
    • Addition of exhaust ducts to the roof
    • New ventilation unit
    • New self contained units
    • New main ductwork
    • New VAV terminal units
    • New cooling tower
    • Conversion to water-side economizer
  • Electrical

    New electrical meters, panel boards, and transformers to tenant floors

  • Plumbing

    New plumbing system for new amenity spaces.