Component Guide

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Passive In-Cabinet Ducting

Ducting Versus No Ducting

Research conducted in the Panduit thermal laboratory validates that a thermal ducting

solution along with containment allows you to prevent recirculation inside the cabinet

and increase the temperature per ASHRAE standards. The improved thermal

performance enabled by the ducting allows switches to operate at higher cold aisle

temperatures. The increase in supply air temperature can improve the efciency of

traditional chiller-based HVAC systems or increase the hours of operation for

economizer systems, which decreases the amount of energy required to cool the data

center. The Panduit

Net-Direct

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Passive In-Cabinet Ducting System is comprised of

thermal management products that provide the optimum thermal performance and

energy cost savings.

The following chart illustrates the cost savings achieved when using inlet ducting in

the 80° or 90° environment. The recommended ASHRAE data center operating

temperature is 80°. The maximum allowable temperature for short time periods is 90°.

When using the recommended 80° temperature, with a ducting solution, the cost

savings is over $124,000. When using the maximum allowable temperature, the cost is

over $54,000.

Room has a total heat load of approximately 1mW; 182 cabinets, 23 housing the 28 side breathing switches; All

unused RU spaces in the cabinets are blanked off; all CRAH units run at the same speed.

Panduit

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With vs. Without Inlet Ducting