• Hemel Hempstead 1 Data Center

Our Hemel Hempstead 1 Data Center is located in Hemel Hempstead, Hertfordshire, which is about 35 km north of London and forms part of the Greater London Urban Area. The locality has attracted many businesses due to its proximity to London and excellent connectivity links, with easy access to the UK motorway network and London airports. The data center is a 2,350 sqm single-level data center with 740 sqm of server space and a total critical IT load of 2 MW. As well as being connected to other NTT data centers, the facility is also connected to major carrier hubs in both Slough and the Docklands which has been established as the UK’s internet hub and the backbone for the global internet network, which facilitates the majority of the London Internet Exchange (LINX).

At a glance: Hemel Hempstead 1 Data Center

Power supply:

  • Dual dedicated 11 kV (HV) grid connections via diverse underground feeders from primary substation
  • Dedicated HV substation on-site
  • Two separate UPS systems (A- and B- supply) with n+1 redundancy
  • Redundantly designed emergency power system with diesel generators n+1
  • Maximum IT load of 2 MW


  • 24/7 Security Operations Center (SOC) and Service Control Center
  • Redundant monitoring of all critical functions underpinned by standardized security processes and the multilevel security zone principle, secures the rental area and the technical operation
  • 3 m security palisade fencing, topped with »Rota-Spikes«
  • Card swipe entry/exit to all doors

Technical operations:

  • Monitoring of all critical infrastructure by own operation staff on-site
  • Standardized operation processes with amplified technical systems redundancy in order to ensure maximum reliability


  • Carrier-neutral
  • Carrier mix from global tier 1 supplier to regional supplier
  • Diverse Carrier-Meet-Me-Rooms
  • Redundant cabling infrastructure with diverse paths
  • Pre-cabling to support fast cross connect deployments
  • Inter DC connectivity between NTT data centers for geo-redundant solutions
  • Access to major cloud service providers such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform