Kolo DK4 Viby J.
Your regional colocation hub—4 km from Aarhus city center. Use it as your primary high-density facility with enterprise-grade reliability or as your dedicated disaster recovery site for true redundancy.
Close enough for rapid access, far enough for peace of mind.
Location
Søndervangs Alle 20, 8260 Viby J, Denmark
Located in Viby J—Aarhus’s southern district with direct E45 motorway access connecting to Ring 2 and central Aarhus within minutes. 50 minutes’ drive from Aarhus airport. Visitor parking is available.
Why DK4?
Whether you need a primary colocation hub or a standby recovery site, DK4 Viby delivers the infrastructure foundation to keep your business running. Our Viby J. data center powers day-to-day operations and ensures continuity through planned maintenance, demand surges, or unplanned outages.
Four kilometers from Aarhus city center delivers the operational proximity your recovery teams require while maintaining geographic separation essential for effective disaster recovery. Your technical staff can reach the facility quickly to execute recovery procedures, enabling rapid response when business continuity depends on swift action.
Denmark’s data sovereignty protections ensure your disaster recovery operations maintain compliance consistency with your primary infrastructure. The regulatory stability and EU data protection standards reduce compliance complexity during recovery operations when your focus needs to remain on restoring business continuity rather than navigating cross-border data regulations.
Twenty-four-hour fuel autonomy, N+1 cooling redundancy, and high-density deployment capabilities provide the stable foundation for sustained recovery operations. Your critical systems maintain optimal environmental conditions while supporting compute-intensive workloads during extended recovery periods. Your teams can methodically restore primary operations without infrastructure constraints limiting recovery timeframes or computational capacity.
Financial institutions rely on DK4 for transaction system recovery that minimizes revenue impact. Healthcare organizations maintain patient care system availability during primary site restoration. Government agencies ensure public service continuity while addressing infrastructure failures. Technology companies protect customer operations and data integrity throughout extended recovery periods.
Powered by Danish renewable energy

Your operations run on 100% clean power
Denmark generates nearly 60% of its electricity from wind power and ranks as one of the world’s most sustainable countries. We enhance this through long-term Power Purchase Agreements, ensuring clean energy for your operations.
Kolo DK4 achieves a PUE of 1.15 through advanced cooling systems and Denmark’s temperate climate, enabling natural cooling for most of the year—delivering both environmental and operational excellence.
Beyond basic support: the Kolo approach
Our technical team becomes an extension of yours, providing the expertise and responsiveness you expect for critical infrastructure.
Dedicated support
Direct access to senior engineers
24/7 Coverage
On-site support during business hours, with 24/7 on-call availability
Flexible contracting
Scale from a single cabinet to private suites with custom terms
Implementation expertise
On-site migration and setup support
”Working with Kolo has had a major impact on our resilience, stability and security. If you don’t hear about IT, it’s running smoothly – and that’s exactly what we have with Kolo.”
Michael Ebenhardt Kristensen, IT manager, Europcar Denmark
DK4 technical specifications
Regional recovery that reinforces your strategy. Kolo DK4 combines high-density capabilities with reliable infrastructure, backup power, and recovery workspace for businesses serious about continuity planning.
- Renewable supply: 100% certified Danish renewable energy backed by long-term Power Purchase Agreements (PPAs)
- Backup systems: N+1 diesel generators with 48-hour fuel autonomy and no less than 20-minute UPS battery bridge
- Design: Hot/cold aisle containment with N+1 redundant cooling units supporting high-density deployments of 30+ kW per cabinet
- Efficiency: Free cooling for 25% of the year utilizing Denmark’s climate
- Environmental: Closed-loop cooling systems using low-GWP refrigerants
- Performance: Maintained PUE of 1.15 (annual average)
- Physical security: 24/7 access control with multi-factor authentication. Double interlocked door systems at all entry points
- Security customization: Adaptable security controls with client-specified enhancements available upon request
- Fire protection: VESDA early warning system with zoned Inergen gas suppression
- Technical assistance: 24/7 Remote Hands service
- Workspace options: Secure staging areas, unpacking zones, and dedicated customer work areas
- Facility amenities: Parking, restrooms, and meeting rooms
Ready to experience DK4?
Let’s assess your infrastructure needs and explore how Kolo DK4 aligns with your technical and business requirements.
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