U.S. Department of Energy - Energy Efficiency and Renewable Energy

Federal Energy Management Program

New and Underutilized Technology: Air-side Economizers and Filters for Data Centers

The following information outlines key deployment considerations for air-side economizers and filters for data centers within the Federal sector.


Air-side economizers and filters leverage 100% outside-air cooling capability in a data center to provide free cooling.


Air-side economizers and filters are applicable in larger data centers with raised floors and multiple rack aisles.

Key Factors for Deployment

Air-side economizers and filters may require larger ductwork. Very large energy savings are possible depending on the climate.

Ranking Criteria

Federal energy savings, cost-effectiveness, and probability of success are ranked 0-5 with 0 representing the lowest ranking and 5 representing the highest ranking. The weighted score is ranked 0-100 with 0 representing the lowest ranking and 100 representing the highest ranking.

Federal Energy Savings Cost Effectiveness Probability of Success Weighted Score
0.2 5.0 5.0 52