A Tier III data center, as defined by the Uptime Institute, is a concurrently maintainable facility designed to deliver 99.982% uptime (approximately 1.6 hours of allowable downtime per year). This means the infrastructure can undergo planned maintenance, repairs, or component replacements without interrupting power, cooling, or IT operations to the customer equipment.
Key characteristics of Tier III certification include:
- Redundant capacity components (N+1) for power, cooling, and network paths
- Multiple independent distribution paths for power and cooling Ability to perform maintenance on any system while continuing full operations
- Compartmentalization to isolate failures and prevent cascading issues
- Strict testing and documentation to verify concurrent maintainability
For colocation customers, choosing a Tier III (or higher) facility provides significantly higher reliability and peace of mind compared to Tier I or II data centers. It ensures your critical workloads experience minimal risk of unplanned downtime due to routine maintenance or single-component failures, making it the standard choice for enterprise, compliance-driven, and mission-critical applications.
At Opus Interactive, both our Hillsboro, OR, and Manassas, VA data centers are engineered to Tier III+ standards, delivering the concurrent maintainability and redundancy businesses rely on—combined with sustainable Net Zero energy goals for forward-thinking operations. Additionally, our facilities are each designed to deliver 99.995+% uptime.