Northern Virginia – Sterling VII Data Center

Sterling, Virginia

Sterling, VA Data Center Offers CyrusOne National IX Platform

21350 Pacific Blvd.
Sterling, VA 20166

Northern Virginia – Sterling VII – Highlights

  • Overview
  • Power
  • Cooling
  • Security
  • Fire Protection
  • Amenities
  • Connectivity

  • Total GSF – 177,019 GSF

  • Office/Storage – 7,362 square feet

  • Data Hall RAF – 89,097 square feet

  • Chiller Plant – Each hall is nominally 6 MW at N+1.
  • Data Hall – 225-ton CRAH units, N+2 configuration

  • Very Early Smoke Detection Apparatus (VESDA) system; sampling air in parts per million coupled with a zonal dual-action interlocking dry-pipe pre-action system

  • Double interlock pre-action sprinklers in all critical areas and circulation corridors. Wet sprinklers in office area

  • Utility Capacity – Approximately 150-175MW, with 30MW available for S7 plus a little bit of load over in S5. Utility growth is dependent on customer load growth.
  • Utility Voltage – 34.5kV
  • Number of Utility Feeders – Two currently with the third on the way, end game is five including the service to permanently feed S7.
  • Number of Transformers on site – 15 plus 1 house for Sterling Vll; no substation transformers for this site
  • UPS Configuration and capacity – 6MW block redundant, 5-make-4 blocks
  • Generator Power – 33.75MW plus 1.75MW house
  • Electrical capacity allowed per cabinet – by CONE/Customer

  • Physical – Anti-Scale fence around the property, electronic gates and gate arms at entrance to the site

  • Guards – Secure entry into space via Security Office with guards

  • Electronic – Electronic surveillance, card reader access control to building and space

  • Perimeter fence

  • Dulles International Airport – 8 miles
  • Washington National Airport – 35 miles
  • Various restaurants and hotels nearby

  • CyrusOne Zero Water Consumption Cooling: No water is consumed to cool this facility (such as water towers or evaporative cooling).  Minimal amounts of water are used for humidification and facility maintenance. This facility uses highly efficiency chillers, variable frequency drives, and energy-efficient CRAH units to achieve high-efficiency air-cooled chilling.  An average US data center of the same size typically consumes over 9.8 million gallons of water per month for cooling.


  • Regional Water Stress: The Northern Virginia area currently faces low water stress, which is projected to increase to medium to high stress in the future. Unlike many other data centers, CyrusOne’s Northern Virginia – Sterling V facility does not use water for cooling and is therefore insulated from this regional water risk, both current and future.
Water Stress and Use Now 2030 Projection 2040 Projection
Regional Water Stress Low Medium to High Medium to High
CyrusOne Water Use Zero Consumption Zero Consumption Zero Consumption

(Risk assessment and projections based on WRI Aqueduct Tool)


  • Regional Grid Greenhouse Gases: How much greenhouse gas does this facility’s local electrical grid emit while generating electricity?  (Useful for Location-based greenhouse gas reporting)
Greenhouse Gases 2004 2007 2012 2016 2018
MTCO2/MWh 0.520 0.507 0.423 0.365 0.337

The carbon-intensity of the grid has improved about 2.7% points per year over the last 14 years of published data.  Reported by the US EPA eGRID for the SERC Virginia/Carolina subregion (SRVC).


  • Regional Grid Renewables: What percentage of this facility’s local electrical grid is from renewable sources (wind, solar, biomass, hydro, and geothermal)?
Grid Renewables 2004 2007 2012 2016 2018
Percent from renewable sources 3.7% 2.7% 3.4% 5.6% 7.7%

This has been increasing about 0.3% points per year over the last 14 years of published data.  Based on US EPA eGRID data for the SRVC region.

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  • Carrier-neutral and part of the CyrusOne Internet Exchange (IX)

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The Nation’s First National Internet Exchange

With CyrusOne’s National IX, customers can configure a virtual on-net platform from a multitude of carriers and providers, allowing optimal flexibility and interconnection with anyone at any connected facility and to the cloud.

As part of CyrusOne’s National IX platform, this Sterling data center provides interconnection to other CyrusOne data centers.

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