Walhalla, Tissat's data center of information located in Castellón, is the first center of data processing at national level that obtains the certification of AENOR's Energetic Sustainability in Centers of Data processing (CPD). This certification based on the technical specification AENOR ' EA 0044 ', accredits that the CPD expire with the requirements of energetic audits, systems of management of the energy and carbon footprint established in the above mentioned technical specification. This means that Walhalla assures a permanent optimization energy efficiency.

Walhalla has obtained this certification after overcoming an exhaustive audit held by AENOR (Spanish Association of Normalization and Certification). Walhalla Data Center in Castellón was also certificed by the Uptime Institute as a TIER IV center, because of its maximum safety guarantee.