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NTT Hemel Hempstead 3 Data Center (HH3)
NTT DATA, Inc. · Hemel Hempstead · London Metro · United Kingdom
- Design resilience tier
- III
- Redundancy (as published)
- Dual dedicated 11,000V (HV) grid connections (2N) · Dedicated 2N redundant HV substations on-site · Minimum N+1 (UPS) with battery backup · N+1 backup generators · Refuelling contracts to ensure timely replacement · Service level agreement: 99.999% power uptime availability (fact sheet 2024). We provide you with the best possible physical and technical infrastructure supported by 2N UPS systems, 2N generator backup, as well as highly redundant cooling systems. (site brochure 2024)
- Floor area
- 8,900 m² whitespace
- Security
- 24/7 on-site security
- Rack density
- 20 kW
Platform reviewed · 05 Sept 2026 · Recent
- Density (as published)
- Contained hot aisle or chimney rack design for high efficiency cooling up to 20kW per rack (site brochure 2024)
- Power band
- 20–50 MW
Imported · Recorded 08 Jun 2026 · Recent
- Cooling
- Air cooling
- Availability
- Availability on request
Imported · Recorded 08 Jun 2026 · Not recent
- Cross-connect
- On request
- Services
- Colocation, connectivity, high-density and wholesale
- Certifications 9
- ISO 27001ISO 9001ISO 14001ISO 50001ISO 45001ISO 22301ISAE 3402ISAE 3000PCI DSS
Location
View on the full map · Elevation 142 m above sea level
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