Hot/Cold Aisle Calculator
Design hot/cold aisle containment layout from rack count, power density, and aisle dimensions.
Inputs
Results
Total racks
40
Total IT load (kW)280
Required airflow (CFM)35,385
Floor area (ft²)560
Cold aisle velocity (FPM)553
Return air temp (°F)89
Power density (W/ft²)500
Containment efficiency (%)85
How to Use This Calculator
- Enter the number of racks and average kW per rack.
- Set aisle width in feet and containment type (cold aisle vs. hot aisle).
- Input CRAC/CRAH unit CFM per ton rating.
- Review the CFM required per rack and number of cooling units needed.
- Verify cold aisle supply air temperature meets ASHRAE A1-A4 envelope for your equipment.
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