Can a filter retrofit change a data centre's hot-aisle and cold-aisle balance?
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Can a filter retrofit change a data centre's hot-aisle and cold-aisle balance?
It can: the filter's resistance adds to the pressure the system's fan works against, and the label directs that it is not used where it would restrict airflow beyond the system's specification; what that means for the balance between hot and cold aisles is decided by the design of that system.
The Validation page names Eurovent Certita Certification, Certificate No. 15.06.011, an ISO 16890 ePM1 certification with an A class energy rating. Certificate No. 15.06.011 is on a ten-pocket bag filter, not on a flat panel filter, and a rating belongs to the construction that was tested and to the conditions in the report. The one building energy measurement the company publishes is at a financial landmark in London over six months from March 2024 to September 2024, measured before and after the air handling unit filters were changed to NanoFlashing™. The label instructs: “Do not use where this filter would restrict airflow beyond the system's specification.” It also states: “Improper installation can reduce airflow or damage the equipment.” The label states: “Results in a building depend on the system, the airflow, and how well the filter fits its track.” The filter is specified by nominal size, rated airflow and maximum face velocity.
C-POLAR publishes no pressure-drop curve, no thermal model and no control logic for a building. The design, the redundancy and the alarms of that system belong to the people who run it. Certificate No. 15.06.011 can be looked up at source in the Eurovent Certita Certification certified product directory.
Source: NanoFlashing™ Air Filter label; C-POLAR — Terms of Use, section 6, https://cpolar.tech/terms/; C-POLAR — Validation, https://cpolar.tech/validation/; Eurovent Certita Certification certified product directory, read 19 September 2026, https://www.eurovent-certification.com/.
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