CoolSim · Simulation report
Example Data Hall
Simulated September 9, 2026 · CoolSim 5.4 · Fine mesh, 655,782 cells
124.11 × 57.49 × 11.75 ft · 7,135 ft²
Non-raised floor, ceiling return plenum
234 racks in 47 rows · 936 kW IT load · 18 cooling units
Result
Overcooled
Every rack draws in air colder than ASHRAE recommends. None runs hot.
17 of 18 cooling units supply air at 60.0 °F, below the 64.4 °F that ASHRAE recommends at a rack inlet. The other supplies 65.0 °F.
Rack inlets against the ASHRAE recommended range, 64.4–80.6 °F
234
Too cold
coldest inlet below 64.4 °F
0
In range
every inlet point inside the range
0
Too hot
warmest inlet above 80.6 °F

Key indices

Cooling capacity in useCAPACITY
87% Little headroom
0 50 80 100 120
Heat removed by the active cooling units ÷ their rated capacity. Above 100% the model asks more of the units than they are rated for.
Return Temperature IndexRTI
98.6% Balanced
50 70 80 100 120 130 150
BypassRecirculation
Supply air vs. rack demand. 100% = matched; below = cold air bypasses the racks, above = hot air recirculates.
Rack Cooling Index, highRCIHI
100.0% Good
50 90 95 100
100% = no rack inlet above the recommended maximum temperature.
Rack Cooling Index, lowRCILO
28.9% Poor
50 90 95 100
100% = no rack inlet below the recommended minimum temperature.

Findings

Racks234 of 234racks draw some air below the 64.4 °F recommended minimum; 155 are below it on average. Coldest inlet: 60.1 °F at RackRow_16 · Rack_1.
Racks0 of 234racks above the 80.6 °F recommended maximum. Warmest inlet: 76.9 °F at RackRow_39 · Rack_4. All 234 stay inside the allowable 59–90 °F.
Cooling97%of its rating on the busiest cooling unit, CRAC_14_1: 58.0 kW of 60 kW. Across all 18 units: 937 kW of 1,080 kW.
Airflow+1.5%more air supplied than the racks draw: 117,013 cfm supplied, 115,338 cfm through the racks. Little bypass, little recirculation.
EnergyNot computedPUE and annual cooling cost need the cooling system’s COP, which was not entered for this model.
SolutionConvergedEvery residual reached its target, and the heat entering the room and the heat leaving it balance to better than 0.01% of the rack heat.
RTI, RCIHI and RCILO are trademarks of ANCIS Inc. · Every rack, cooling unit and grille is listed in the sections below.

Racks

234 of 234 racks take in some air colder than the recommended 64.4 °F minimum. None takes in any warmer than the 80.6 °F maximum.

Where: each rack in the color of the air it takes in

Coldest inletRackRow_16 · Rack_1 · 60.1 °FWarmest inletRackRow_39 · Rack_4 · 76.9 °F17 cooling units supply 60.0 °Fbelow the 64.4 °F recommended minimumCRAC_0_01 supplies 65.0 °Finside the recommended range
Colder than allowable
below 59.0 °F
0 racks
Colder than recommended
59.0–64.4 °F
234 racks
In recommended range
64.4–80.6 °F
0 racks
Warmer than recommended
80.6–90.0 °F
0 racks
Warmer than allowable
above 90.0 °F
0 racks
A rack takes the color of its warmest inlet point when that is above the recommended range, else of its coldest when that is below it; grey is inside the range at every point. The same five bands and colors are used in the result above and the row-by-row list below. They judge the air a rack takes in, so the Airflow view below does not use them: it colors the room’s air by temperature. Server faces are drawn where a rack’s inlet faces this view; cooling units along the near wall are cut off low down so the racks behind them show.In the model the color is on the face a rack takes air in through; the dark face opposite is where the air leaves. Turn the model to see the racks facing away. A cooling unit in front of racks is cut off low down.

Racks furthest outside the recommended range on average

Rack rowRackColdest inlet
°F		Average inlet
°F		Warmest inlet
°F		Average outside by
°F		Status
RackRow_14Rack_160.160.661.03.8Colder than recommended
RackRow_16Rack_160.160.661.13.8Colder than recommended
RackRow_22Rack_160.260.763.23.7Colder than recommended
RackRow_28Rack_1560.260.862.63.6Colder than recommended
RackRow_28Rack_860.460.961.73.5Colder than recommended
RackRow_44Rack_160.260.962.73.5Colder than recommended
RackRow_13Rack_160.160.966.73.5Colder than recommended
RackRow_44Rack_960.461.062.13.4Colder than recommended
RackRow_50Rack_160.261.061.63.4Colder than recommended
RackRow_44Rack_860.461.061.63.4Colder than recommended
224 more racks draw some air outside the range. All 234 racks are listed row by row below.
All racks, row by row 23447 rows
Row and rackInlet air, coldest to warmest
64.480.659.090.0
Coldest
°F		Average
°F		Warmest
°F		Exhaust
°F		Airflow
cfm		Status
RackRow_4615 racks
60.365.076.790.47,39915 colder than recommended
Rack_1
60.565.974.191.0500Colder than recommended
Rack_2
60.667.374.192.7495Colder than recommended
Rack_3
60.667.573.592.9495Colder than recommended
Rack_4
60.766.070.591.4494Colder than recommended
Rack_5
60.864.567.489.9492Colder than recommended
Rack_6
60.762.764.988.1491Colder than recommended
Rack_7
60.562.063.287.4490Colder than recommended
Rack_8
60.562.964.788.3491Colder than recommended
Rack_9
60.464.067.089.4492Colder than recommended
Rack_10
60.465.672.591.0494Colder than recommended
Rack_11
60.466.976.292.3495Colder than recommended
Rack_12
60.466.676.592.0494Colder than recommended
Rack_13
60.365.776.791.2494Colder than recommended
Rack_14
60.364.174.489.5492Colder than recommended
Rack_15
60.362.470.087.9490Colder than recommended
RackRow_4515 racks
60.365.073.390.47,40015 colder than recommended
Rack_1
60.363.970.589.0498Colder than recommended
Rack_2
60.465.472.290.9493Colder than recommended
Rack_3
60.566.372.791.8494Colder than recommended
Rack_4
60.666.973.392.3495Colder than recommended
Rack_5
60.667.073.392.4495Colder than recommended
Rack_6
60.765.471.390.8493Colder than recommended
Rack_7
60.762.865.688.3491Colder than recommended
Rack_8
60.761.662.587.0490Colder than recommended
Rack_9
60.963.667.689.0492Colder than recommended
Rack_10
60.966.673.292.1494Colder than recommended
Rack_11
60.867.373.292.7495Colder than recommended
Rack_12
60.766.571.991.9494Colder than recommended
Rack_13
60.665.370.490.7493Colder than recommended
Rack_14
60.563.868.489.2492Colder than recommended
Rack_15
60.462.665.688.1491Colder than recommended
RackRow_449 racks
60.262.167.087.54,4189 colder than recommended
Rack_1
60.260.962.786.0495Colder than recommended
Rack_2
60.261.765.787.1490Colder than recommended
Rack_3
60.362.867.088.2491Colder than recommended
Rack_4
60.363.266.988.6491Colder than recommended
Rack_5
60.463.366.588.7491Colder than recommended
Rack_6
60.462.966.388.3491Colder than recommended
Rack_7
60.461.963.487.3490Colder than recommended
Rack_8
60.461.061.686.4489Colder than recommended
Rack_9
60.461.062.186.4489Colder than recommended
RackRow_438 racks
60.363.774.689.13,9408 colder than recommended
Rack_1
60.864.774.689.9499Colder than recommended
Rack_2
60.965.974.491.3494Colder than recommended
Rack_3
61.065.671.991.1494Colder than recommended
Rack_4
61.064.166.889.6492Colder than recommended
Rack_5
61.163.365.588.7491Colder than recommended
Rack_6
60.461.862.987.2490Colder than recommended
Rack_7
60.361.663.187.1490Colder than recommended
Rack_8
60.362.564.787.9491Colder than recommended
RackRow_428 racks
60.465.275.990.63,9518 colder than recommended
Rack_1
60.465.575.190.6499Colder than recommended
Rack_2
60.567.375.992.7495Colder than recommended
Rack_3
60.667.774.793.1496Colder than recommended
Rack_4
60.867.274.092.7495Colder than recommended
Rack_5
60.965.669.591.0493Colder than recommended
Rack_6
61.064.266.389.6492Colder than recommended
Rack_7
60.762.464.187.9491Colder than recommended
Rack_8
60.661.862.887.2490Colder than recommended
RackRow_418 racks
60.263.270.088.63,9368 colder than recommended
Rack_1
60.261.964.787.0496Colder than recommended
Rack_2
60.363.066.188.4491Colder than recommended
Rack_3
60.463.866.989.2492Colder than recommended
Rack_4
60.564.769.390.1493Colder than recommended
Rack_5
60.565.370.090.7493Colder than recommended
Rack_6
60.664.068.089.4492Colder than recommended
Rack_7
60.661.963.887.3490Colder than recommended
Rack_8
60.661.161.586.5489Colder than recommended
RackRow_408 racks
60.461.966.387.33,9278 colder than recommended
Rack_1
60.562.366.387.4496Colder than recommended
Rack_2
60.562.465.987.8490Colder than recommended
Rack_3
60.562.264.887.7490Colder than recommended
Rack_4
60.562.063.887.5490Colder than recommended
Rack_5
60.561.963.087.3490Colder than recommended
Rack_6
60.561.762.587.1490Colder than recommended
Rack_7
60.461.662.387.0490Colder than recommended
Rack_8
60.461.562.186.9490Colder than recommended
RackRow_396 racks
60.264.476.989.72,9606 colder than recommended
Rack_1
60.265.273.990.3499Colder than recommended
Rack_2
60.265.976.091.3494Colder than recommended
Rack_3
60.265.676.591.0493Colder than recommended
Rack_4
60.264.776.990.1493Colder than recommended
Rack_5
60.263.276.488.6491Colder than recommended
Rack_6
60.261.671.287.0490Colder than recommended
RackRow_386 racks
60.365.275.290.62,9656 colder than recommended
Rack_1
60.563.765.888.9498Colder than recommended
Rack_2
60.565.370.890.8493Colder than recommended
Rack_3
60.466.674.392.0494Colder than recommended
Rack_4
60.466.675.292.1494Colder than recommended
Rack_5
60.365.675.291.1494Colder than recommended
Rack_6
60.363.572.688.9492Colder than recommended
RackRow_376 racks
60.463.669.589.02,9566 colder than recommended
Rack_1
60.863.966.989.0498Colder than recommended
Rack_2
60.865.269.590.6493Colder than recommended
Rack_3
60.764.468.689.8492Colder than recommended
Rack_4
60.663.566.388.9492Colder than recommended
Rack_5
60.562.665.188.1491Colder than recommended
Rack_6
60.461.963.787.3490Colder than recommended
RackRow_366 racks
60.362.267.187.52,9486 colder than recommended
Rack_1
60.662.366.787.5496Colder than recommended
Rack_2
60.663.267.188.6491Colder than recommended
Rack_3
60.662.665.688.0491Colder than recommended
Rack_4
60.561.963.987.4490Colder than recommended
Rack_5
60.461.562.987.0490Colder than recommended
Rack_6
60.361.362.286.7489Colder than recommended
RackRow_356 racks
60.763.664.989.02,9566 colder than recommended
Rack_1
60.763.164.788.2497Colder than recommended
Rack_2
63.564.164.889.5492Colder than recommended
Rack_3
62.963.764.989.2492Colder than recommended
Rack_4
62.663.564.988.9492Colder than recommended
Rack_5
62.663.564.989.0492Colder than recommended
Rack_6
62.663.764.989.1492Colder than recommended
RackRow_3415 racks
60.864.574.189.97,39615 colder than recommended
Rack_1
61.662.863.387.9497Colder than recommended
Rack_2
61.663.064.288.5491Colder than recommended
Rack_3
61.663.766.989.2491Colder than recommended
Rack_4
61.664.669.590.0492Colder than recommended
Rack_5
61.664.770.090.1492Colder than recommended
Rack_6
61.664.368.989.7493Colder than recommended
Rack_7
61.564.267.389.6493Colder than recommended
Rack_8
61.564.366.689.7493Colder than recommended
Rack_9
61.564.666.690.0493Colder than recommended
Rack_10
61.464.967.790.3494Colder than recommended
Rack_11
61.365.470.090.9494Colder than recommended
Rack_12
61.365.972.291.4495Colder than recommended
Rack_13
61.266.073.891.4494Colder than recommended
Rack_14
61.065.474.190.8493Colder than recommended
Rack_15
60.864.273.589.6492Colder than recommended
RackRow_3315 racks
60.364.776.590.17,39515 colder than recommended
Rack_1
60.362.971.288.0497Colder than recommended
Rack_2
60.365.275.890.6493Colder than recommended
Rack_3
60.466.976.592.3495Colder than recommended
Rack_4
60.467.075.692.4495Colder than recommended
Rack_5
60.566.471.891.8494Colder than recommended
Rack_6
60.665.069.090.4493Colder than recommended
Rack_7
60.663.266.188.6491Colder than recommended
Rack_8
60.961.862.887.2490Colder than recommended
Rack_9
61.062.162.887.5490Colder than recommended
Rack_10
61.063.164.688.5491Colder than recommended
Rack_11
61.063.765.589.1492Colder than recommended
Rack_12
61.064.869.490.2493Colder than recommended
Rack_13
60.966.373.691.7494Colder than recommended
Rack_14
60.866.374.591.7494Colder than recommended
Rack_15
60.765.374.390.7493Colder than recommended
RackRow_3215 racks
60.264.876.890.27,39715 colder than recommended
Rack_1
60.462.867.487.9497Colder than recommended
Rack_2
60.564.872.990.2493Colder than recommended
Rack_3
60.667.275.292.6495Colder than recommended
Rack_4
60.767.574.892.9495Colder than recommended
Rack_5
60.866.269.991.6494Colder than recommended
Rack_6
60.864.767.890.1493Colder than recommended
Rack_7
60.562.665.288.1491Colder than recommended
Rack_8
60.561.862.687.3490Colder than recommended
Rack_9
60.462.663.988.0491Colder than recommended
Rack_10
60.463.665.889.0492Colder than recommended
Rack_11
60.464.467.689.8492Colder than recommended
Rack_12
60.366.273.291.7494Colder than recommended
Rack_13
60.367.076.192.4495Colder than recommended
Rack_14
60.266.376.891.7494Colder than recommended
Rack_15
60.264.275.689.6492Colder than recommended
RackRow_3115 racks
60.264.776.290.17,39615 colder than recommended
Rack_1
60.363.371.088.4497Colder than recommended
Rack_2
60.365.975.391.3494Colder than recommended
Rack_3
60.467.075.092.5495Colder than recommended
Rack_4
60.466.673.692.0494Colder than recommended
Rack_5
60.564.969.290.3493Colder than recommended
Rack_6
60.663.765.689.1492Colder than recommended
Rack_7
60.662.564.387.9491Colder than recommended
Rack_8
60.561.963.287.3490Colder than recommended
Rack_9
60.463.265.288.6491Colder than recommended
Rack_10
60.464.166.189.5492Colder than recommended
Rack_11
60.465.169.590.5493Colder than recommended
Rack_12
60.366.575.291.9494Colder than recommended
Rack_13
60.366.676.292.0494Colder than recommended
Rack_14
60.365.775.791.2494Colder than recommended
Rack_15
60.263.873.789.2492Colder than recommended
RackRow_3015 racks
60.264.272.289.67,38915 colder than recommended
Rack_1
60.362.871.588.0497Colder than recommended
Rack_2
60.364.271.789.6492Colder than recommended
Rack_3
60.365.070.290.4493Colder than recommended
Rack_4
60.465.469.790.9493Colder than recommended
Rack_5
60.465.569.391.0493Colder than recommended
Rack_6
60.465.168.390.5493Colder than recommended
Rack_7
60.563.866.889.2492Colder than recommended
Rack_8
60.561.863.487.2490Colder than recommended
Rack_9
60.462.364.487.8490Colder than recommended
Rack_10
60.364.467.789.8492Colder than recommended
Rack_11
60.365.168.090.5493Colder than recommended
Rack_12
60.364.867.490.3493Colder than recommended
Rack_13
60.264.768.590.1493Colder than recommended
Rack_14
60.264.671.590.0493Colder than recommended
Rack_15
60.263.472.288.8491Colder than recommended
RackRow_2915 racks
60.162.967.988.37,37015 colder than recommended
Rack_1
60.262.167.687.3496Colder than recommended
Rack_2
60.262.867.588.2491Colder than recommended
Rack_3
60.263.467.988.8491Colder than recommended
Rack_4
60.363.967.989.3492Colder than recommended
Rack_5
60.363.667.089.1492Colder than recommended
Rack_6
60.363.065.288.4491Colder than recommended
Rack_7
60.362.464.287.8490Colder than recommended
Rack_8
60.361.262.286.6489Colder than recommended
Rack_9
60.261.963.887.3490Colder than recommended
Rack_10
60.263.365.788.7491Colder than recommended
Rack_11
60.263.666.289.1492Colder than recommended
Rack_12
60.163.766.989.1492Colder than recommended
Rack_13
60.163.467.088.8491Colder than recommended
Rack_14
60.162.867.088.2491Colder than recommended
Rack_15
60.162.167.987.5490Colder than recommended
RackRow_2815 racks
60.261.966.287.37,35715 colder than recommended
Rack_1
60.361.263.186.3495Colder than recommended
Rack_2
60.361.665.587.1490Colder than recommended
Rack_3
60.462.165.487.5490Colder than recommended
Rack_4
60.462.465.587.8491Colder than recommended
Rack_5
60.462.765.588.1491Colder than recommended
Rack_6
60.462.565.488.0491Colder than recommended
Rack_7
60.461.664.387.1490Colder than recommended
Rack_8
60.460.961.786.3489Colder than recommended
Rack_9
60.361.462.886.8490Colder than recommended
Rack_10
60.362.364.687.8490Colder than recommended
Rack_11
60.362.765.788.2491Colder than recommended
Rack_12
60.262.766.288.1491Colder than recommended
Rack_13
60.262.366.287.7490Colder than recommended
Rack_14
60.261.565.586.9490Colder than recommended
Rack_15
60.260.862.686.2489Colder than recommended
RackRow_27 · Rack_1
60.261.162.586.2495Colder than recommended
RackRow_26 · Rack_1
60.262.166.587.2496Colder than recommended
RackRow_25 · Rack_1
60.363.170.688.3497Colder than recommended
RackRow_24 · Rack_1
60.463.571.088.6497Colder than recommended
RackRow_23 · Rack_1
60.762.870.787.9497Colder than recommended
RackRow_22 · Rack_1
60.260.763.285.9495Colder than recommended
RackRow_21 · Rack_1
60.261.663.586.7496Colder than recommended
RackRow_20 · Rack_1
60.261.665.986.8496Colder than recommended
RackRow_19 · Rack_1
60.362.063.787.1496Colder than recommended
RackRow_18 · Rack_1
60.361.562.586.7496Colder than recommended
RackRow_17 · Rack_1
60.261.161.786.3495Colder than recommended
RackRow_16 · Rack_1
60.160.661.185.8495Colder than recommended
RackRow_15 · Rack_1
60.561.765.286.8496Colder than recommended
RackRow_14 · Rack_1
60.160.661.085.7495Colder than recommended
RackRow_13 · Rack_1
60.160.966.786.1495Colder than recommended
RackRow_12 · Rack_1
60.161.467.186.6495Colder than recommended
RackRow_11 · Rack_1
60.261.967.087.0496Colder than recommended
RackRow_10 · Rack_1
60.161.869.086.9496Colder than recommended
RackRow_9 · Rack_1
60.663.272.688.3497Colder than recommended
RackRow_8 · Rack_1
60.662.769.987.8497Colder than recommended
RackRow_7 · Rack_1
60.762.563.187.6496Colder than recommended
RackRow_6 · Rack_1
60.261.464.886.5495Colder than recommended
RackRow_5 · Rack_1
60.361.864.086.9496Colder than recommended
RackRow_47 · Rack_1
60.261.764.386.8496Colder than recommended
RackRow_48 · Rack_1
60.361.765.486.9496Colder than recommended
RackRow_49 · Rack_1
60.261.366.586.4495Colder than recommended
RackRow_50 · Rack_1
60.261.061.686.1495Colder than recommended
RackRow_51 · Rack_1
62.964.165.089.2498Colder than recommended
Total115,338

recommended rangebelow 59.059.0–64.4in range80.6–90.0above 90.0average°F

Coldest, average and warmest are the air entering each rack’s inlet face; exhaust is the average air leaving it. A row’s line is its racks taken together: their coldest and warmest points, their averages weighted by airflow. ASHRAE 2008 inlet temperature for class 1 servers: recommended 64.4 to 80.6 °F, allowable 59.0 to 90.0 °F. A rack is in range when its coldest and warmest points both are. Every rack carries a heat load of 4.00 kW, 936.00 kW in all.

Inlet air by rack unit

No rack unit takes in air warmer than the recommended 80.6 °F. The warmest rack unit is U49 of RackRow_39 Rack_4, whose inlet air averages 76.8 °F.

Every rack's inlet face 234
80.6 recommended max6064.4 recommended min
Rack_maxRackRow_46Rack_1174.1Rack_2274.1Rack_3373.5Rack_4470.5Rack_5567.4Rack_6664.9Rack_7763.2Rack_8864.7Rack_9967.0Rack_101072.5Rack_111176.2Rack_121276.5Rack_131376.7Rack_141474.4Rack_151570.0U1U12U24U36U48
Rack_maxRackRow_45Rack_1170.5Rack_2272.2Rack_3372.7Rack_4473.3Rack_5573.3Rack_6671.3Rack_7765.6Rack_8862.5Rack_9967.6Rack_101073.2Rack_111173.2Rack_121271.9Rack_131370.4Rack_141468.4Rack_151565.6U1U12U24U36U48
Rack_maxRackRow_44Rack_1162.7Rack_2265.7Rack_3367.0Rack_4466.9Rack_5566.5Rack_6666.3Rack_7763.4Rack_8861.6Rack_9962.1U1U12U24U36U48
Rack_maxRackRow_43Rack_1174.6Rack_2274.4Rack_3371.9Rack_4466.8Rack_5565.5Rack_6662.9Rack_7763.1Rack_8864.7U1U12U24U36U48
Rack_maxRackRow_42Rack_1175.1Rack_2275.9Rack_3374.7Rack_4474.0Rack_5569.5Rack_6666.3Rack_7764.1Rack_8862.8U1U12U24U36U48
Rack_maxRackRow_41Rack_1164.7Rack_2266.1Rack_3366.9Rack_4469.3Rack_5570.0Rack_6668.0Rack_7763.8Rack_8861.5U1U12U24U36U48
Rack_maxRackRow_40Rack_1166.3Rack_2265.9Rack_3364.8Rack_4463.8Rack_5563.0Rack_6662.5Rack_7762.3Rack_8862.1RackRow_39Rack_1173.9Rack_2276.0Rack_3376.5Rack_4476.9Rack_5576.4Rack_6671.2U1U12U24U36U48
Rack_maxRackRow_38Rack_1165.8Rack_2270.8Rack_3374.3Rack_4475.2Rack_5575.2Rack_6672.6RackRow_37Rack_1166.9Rack_2269.5Rack_3368.6Rack_4466.3Rack_5565.1Rack_6663.7U1U12U24U36U48
Rack_maxRackRow_36Rack_1166.7Rack_2267.1Rack_3365.6Rack_4463.9Rack_5562.9Rack_6662.2RackRow_35Rack_1164.7Rack_2264.8Rack_3364.9Rack_4464.9Rack_5564.9Rack_6664.9U1U12U24U36U48
Rack_maxRackRow_34Rack_1163.3Rack_2264.2Rack_3366.9Rack_4469.5Rack_5570.0Rack_6668.9Rack_7767.3Rack_8866.6Rack_9966.6Rack_101067.7Rack_111170.0Rack_121272.2Rack_131373.8Rack_141474.1Rack_151573.5U1U12U24U36U48
Rack_maxRackRow_33Rack_1171.2Rack_2275.8Rack_3376.5Rack_4475.6Rack_5571.8Rack_6669.0Rack_7766.1Rack_8862.8Rack_9962.8Rack_101064.6Rack_111165.5Rack_121269.4Rack_131373.6Rack_141474.5Rack_151574.3U1U12U24U36U48
Rack_maxRackRow_32Rack_1167.4Rack_2272.9Rack_3375.2Rack_4474.8Rack_5569.9Rack_6667.8Rack_7765.2Rack_8862.6Rack_9963.9Rack_101065.8Rack_111167.6Rack_121273.2Rack_131376.1Rack_141476.8Rack_151575.6U1U12U24U36U48
Rack_maxRackRow_31Rack_1171.0Rack_2275.3Rack_3375.0Rack_4473.6Rack_5569.2Rack_6665.6Rack_7764.3Rack_8863.2Rack_9965.2Rack_101066.1Rack_111169.5Rack_121275.2Rack_131376.2Rack_141475.7Rack_151573.7U1U12U24U36U48
Rack_maxRackRow_30Rack_1171.5Rack_2271.7Rack_3370.2Rack_4469.7Rack_5569.3Rack_6668.3Rack_7766.8Rack_8863.4Rack_9964.4Rack_101067.7Rack_111168.0Rack_121267.4Rack_131368.5Rack_141471.5Rack_151572.2U1U12U24U36U48
Rack_maxRackRow_29Rack_1167.6Rack_2267.5Rack_3367.9Rack_4467.9Rack_5567.0Rack_6665.2Rack_7764.2Rack_8862.2Rack_9963.8Rack_101065.7Rack_111166.2Rack_121266.9Rack_131367.0Rack_141467.0Rack_151567.9U1U12U24U36U48
Rack_maxRackRow_28Rack_1163.1Rack_2265.5Rack_3365.4Rack_4465.5Rack_5565.5Rack_6665.4Rack_7764.3Rack_8861.7Rack_9962.8Rack_101064.6Rack_111165.7Rack_121266.2Rack_131366.2Rack_141465.5Rack_151562.6U1U12U24U36U48
Rack_maxRackRow_27Rack_1162.5RackRow_26Rack_1166.5RackRow_25Rack_1170.6RackRow_24Rack_1171.0RackRow_23Rack_1170.7RackRow_22Rack_1163.2RackRow_21Rack_1163.5U1U12U24U36U48
Rack_maxRackRow_20Rack_1165.9RackRow_19Rack_1163.7RackRow_18Rack_1162.5RackRow_17Rack_1161.7RackRow_16Rack_1161.1RackRow_15Rack_1165.2RackRow_14Rack_1161.0U1U12U24U36U48
Rack_maxRackRow_13Rack_1166.7RackRow_12Rack_1167.1RackRow_11Rack_1167.0RackRow_10Rack_1169.0RackRow_9Rack_1172.6RackRow_8Rack_1169.9RackRow_7Rack_1163.1U1U12U24U36U48
Rack_maxRackRow_6Rack_1164.8RackRow_5Rack_1164.0RackRow_47Rack_1164.3RackRow_48Rack_1165.4RackRow_49Rack_1166.5RackRow_50Rack_1161.6RackRow_51Rack_1165.0U1U12U24U36U48

Each rack’s inlet face, U1 at the floor, racks in the order of the table. A cell is the average air entering that rack unit (1U = 1.75 in, 44.45 mm); the figure over each rack is its warmest inlet point, as in the table. The model’s mesh has inlet cells up to 4U tall, so the rack units inside one cell show the same temperature.

All racks as a table 234both ASHRAE ranges, flow rate and heat load
Rack row Rack Inlet temperature
°F		 Mean exit
temperature
°F		 Flow rate
cfm		 Heat load
kW		 Liquid cooling
kW		 ASHRAE inlet range
Min Max Mean Recommended1 Allowable1
RackRow_46 Rack_1 60.5 74.1 65.9 91.0 500 4.00 0.00
Too cold
Pass
Rack_2 60.6 74.1 67.3 92.7 495 4.00 0.00
Too cold
Pass
Rack_3 60.6 73.5 67.5 92.9 495 4.00 0.00
Too cold
Pass
Rack_4 60.7 70.5 66.0 91.4 494 4.00 0.00
Too cold
Pass
Rack_5 60.8 67.4 64.5 89.9 492 4.00 0.00
Too cold
Pass
Rack_6 60.7 64.9 62.7 88.1 491 4.00 0.00
Too cold
Pass
Rack_7 60.5 63.2 62.0 87.4 490 4.00 0.00
Too cold
Pass
Rack_8 60.5 64.7 62.9 88.3 491 4.00 0.00
Too cold
Pass
Rack_9 60.4 67.0 64.0 89.4 492 4.00 0.00
Too cold
Pass
Rack_10 60.4 72.5 65.6 91.0 494 4.00 0.00
Too cold
Pass
Rack_11 60.4 76.2 66.9 92.3 495 4.00 0.00
Too cold
Pass
Rack_12 60.4 76.5 66.6 92.0 494 4.00 0.00
Too cold
Pass
Rack_13 60.3 76.7 65.7 91.2 494 4.00 0.00
Too cold
Pass
Rack_14 60.3 74.4 64.1 89.5 492 4.00 0.00
Too cold
Pass
Rack_15 60.3 70.0 62.4 87.9 490 4.00 0.00
Too cold
Pass
RackRow_45 Rack_1 60.3 70.5 63.9 89.0 498 4.00 0.00
Too cold
Pass
Rack_2 60.4 72.2 65.4 90.9 493 4.00 0.00
Too cold
Pass
Rack_3 60.5 72.7 66.3 91.8 494 4.00 0.00
Too cold
Pass
Rack_4 60.6 73.3 66.9 92.3 495 4.00 0.00
Too cold
Pass
Rack_5 60.6 73.3 67.0 92.4 495 4.00 0.00
Too cold
Pass
Rack_6 60.7 71.3 65.4 90.8 493 4.00 0.00
Too cold
Pass
Rack_7 60.7 65.6 62.8 88.3 491 4.00 0.00
Too cold
Pass
Rack_8 60.7 62.5 61.6 87.0 490 4.00 0.00
Too cold
Pass
Rack_9 60.9 67.6 63.6 89.0 492 4.00 0.00
Too cold
Pass
Rack_10 60.9 73.2 66.6 92.1 494 4.00 0.00
Too cold
Pass
Rack_11 60.8 73.2 67.3 92.7 495 4.00 0.00
Too cold
Pass
Rack_12 60.7 71.9 66.5 91.9 494 4.00 0.00
Too cold
Pass
Rack_13 60.6 70.4 65.3 90.7 493 4.00 0.00
Too cold
Pass
Rack_14 60.5 68.4 63.8 89.2 492 4.00 0.00
Too cold
Pass
Rack_15 60.4 65.6 62.6 88.1 491 4.00 0.00
Too cold
Pass
RackRow_44 Rack_1 60.2 62.7 60.9 86.0 495 4.00 0.00
Too cold
Pass
Rack_2 60.2 65.7 61.7 87.1 490 4.00 0.00
Too cold
Pass
Rack_3 60.3 67.0 62.8 88.2 491 4.00 0.00
Too cold
Pass
Rack_4 60.3 66.9 63.2 88.6 491 4.00 0.00
Too cold
Pass
Rack_5 60.4 66.5 63.3 88.7 491 4.00 0.00
Too cold
Pass
Rack_6 60.4 66.3 62.9 88.3 491 4.00 0.00
Too cold
Pass
Rack_7 60.4 63.4 61.9 87.3 490 4.00 0.00
Too cold
Pass
Rack_8 60.4 61.6 61.0 86.4 489 4.00 0.00
Too cold
Pass
Rack_9 60.4 62.1 61.0 86.4 489 4.00 0.00
Too cold
Pass
RackRow_43 Rack_1 60.8 74.6 64.7 89.9 499 4.00 0.00
Too cold
Pass
Rack_2 60.9 74.4 65.9 91.3 494 4.00 0.00
Too cold
Pass
Rack_3 61.0 71.9 65.6 91.1 494 4.00 0.00
Too cold
Pass
Rack_4 61.0 66.8 64.1 89.6 492 4.00 0.00
Too cold
Pass
Rack_5 61.1 65.5 63.3 88.7 491 4.00 0.00
Too cold
Pass
Rack_6 60.4 62.9 61.8 87.2 490 4.00 0.00
Too cold
Pass
Rack_7 60.3 63.1 61.6 87.1 490 4.00 0.00
Too cold
Pass
Rack_8 60.3 64.7 62.5 87.9 491 4.00 0.00
Too cold
Pass
RackRow_42 Rack_1 60.4 75.1 65.5 90.6 499 4.00 0.00
Too cold
Pass
Rack_2 60.5 75.9 67.3 92.7 495 4.00 0.00
Too cold
Pass
Rack_3 60.6 74.7 67.7 93.1 496 4.00 0.00
Too cold
Pass
Rack_4 60.8 74.0 67.2 92.7 495 4.00 0.00
Too cold
Pass
Rack_5 60.9 69.5 65.6 91.0 493 4.00 0.00
Too cold
Pass
Rack_6 61.0 66.3 64.2 89.6 492 4.00 0.00
Too cold
Pass
Rack_7 60.7 64.1 62.4 87.9 491 4.00 0.00
Too cold
Pass
Rack_8 60.6 62.8 61.8 87.2 490 4.00 0.00
Too cold
Pass
RackRow_41 Rack_1 60.2 64.7 61.9 87.0 496 4.00 0.00
Too cold
Pass
Rack_2 60.3 66.1 63.0 88.4 491 4.00 0.00
Too cold
Pass
Rack_3 60.4 66.9 63.8 89.2 492 4.00 0.00
Too cold
Pass
Rack_4 60.5 69.3 64.7 90.1 493 4.00 0.00
Too cold
Pass
Rack_5 60.5 70.0 65.3 90.7 493 4.00 0.00
Too cold
Pass
Rack_6 60.6 68.0 64.0 89.4 492 4.00 0.00
Too cold
Pass
Rack_7 60.6 63.8 61.9 87.3 490 4.00 0.00
Too cold
Pass
Rack_8 60.6 61.5 61.1 86.5 489 4.00 0.00
Too cold
Pass
RackRow_40 Rack_1 60.5 66.3 62.3 87.4 496 4.00 0.00
Too cold
Pass
Rack_2 60.5 65.9 62.4 87.8 490 4.00 0.00
Too cold
Pass
Rack_3 60.5 64.8 62.2 87.7 490 4.00 0.00
Too cold
Pass
Rack_4 60.5 63.8 62.0 87.5 490 4.00 0.00
Too cold
Pass
Rack_5 60.5 63.0 61.9 87.3 490 4.00 0.00
Too cold
Pass
Rack_6 60.5 62.5 61.7 87.1 490 4.00 0.00
Too cold
Pass
Rack_7 60.4 62.3 61.6 87.0 490 4.00 0.00
Too cold
Pass
Rack_8 60.4 62.1 61.5 86.9 490 4.00 0.00
Too cold
Pass
RackRow_39 Rack_1 60.2 73.9 65.2 90.3 499 4.00 0.00
Too cold
Pass
Rack_2 60.2 76.0 65.9 91.3 494 4.00 0.00
Too cold
Pass
Rack_3 60.2 76.5 65.6 91.0 493 4.00 0.00
Too cold
Pass
Rack_4 60.2 76.9 64.7 90.1 493 4.00 0.00
Too cold
Pass
Rack_5 60.2 76.4 63.2 88.6 491 4.00 0.00
Too cold
Pass
Rack_6 60.2 71.2 61.6 87.0 490 4.00 0.00
Too cold
Pass
RackRow_38 Rack_1 60.5 65.8 63.7 88.9 498 4.00 0.00
Too cold
Pass
Rack_2 60.5 70.8 65.3 90.8 493 4.00 0.00
Too cold
Pass
Rack_3 60.4 74.3 66.6 92.0 494 4.00 0.00
Too cold
Pass
Rack_4 60.4 75.2 66.6 92.1 494 4.00 0.00
Too cold
Pass
Rack_5 60.3 75.2 65.6 91.1 494 4.00 0.00
Too cold
Pass
Rack_6 60.3 72.6 63.5 88.9 492 4.00 0.00
Too cold
Pass
RackRow_37 Rack_1 60.8 66.9 63.9 89.0 498 4.00 0.00
Too cold
Pass
Rack_2 60.8 69.5 65.2 90.6 493 4.00 0.00
Too cold
Pass
Rack_3 60.7 68.6 64.4 89.8 492 4.00 0.00
Too cold
Pass
Rack_4 60.6 66.3 63.5 88.9 492 4.00 0.00
Too cold
Pass
Rack_5 60.5 65.1 62.6 88.1 491 4.00 0.00
Too cold
Pass
Rack_6 60.4 63.7 61.9 87.3 490 4.00 0.00
Too cold
Pass
RackRow_36 Rack_1 60.6 66.7 62.3 87.5 496 4.00 0.00
Too cold
Pass
Rack_2 60.6 67.1 63.2 88.6 491 4.00 0.00
Too cold
Pass
Rack_3 60.6 65.6 62.6 88.0 491 4.00 0.00
Too cold
Pass
Rack_4 60.5 63.9 61.9 87.4 490 4.00 0.00
Too cold
Pass
Rack_5 60.4 62.9 61.5 87.0 490 4.00 0.00
Too cold
Pass
Rack_6 60.3 62.2 61.3 86.7 489 4.00 0.00
Too cold
Pass
RackRow_35 Rack_1 60.7 64.7 63.1 88.2 497 4.00 0.00
Too cold
Pass
Rack_2 63.5 64.8 64.1 89.5 492 4.00 0.00
Too cold
Pass
Rack_3 62.9 64.9 63.7 89.2 492 4.00 0.00
Too cold
Pass
Rack_4 62.6 64.9 63.5 88.9 492 4.00 0.00
Too cold
Pass
Rack_5 62.6 64.9 63.5 89.0 492 4.00 0.00
Too cold
Pass
Rack_6 62.6 64.9 63.7 89.1 492 4.00 0.00
Too cold
Pass
RackRow_34 Rack_1 61.6 63.3 62.8 87.9 497 4.00 0.00
Too cold
Pass
Rack_2 61.6 64.2 63.0 88.5 491 4.00 0.00
Too cold
Pass
Rack_3 61.6 66.9 63.7 89.2 491 4.00 0.00
Too cold
Pass
Rack_4 61.6 69.5 64.6 90.0 492 4.00 0.00
Too cold
Pass
Rack_5 61.6 70.0 64.7 90.1 492 4.00 0.00
Too cold
Pass
Rack_6 61.6 68.9 64.3 89.7 493 4.00 0.00
Too cold
Pass
Rack_7 61.5 67.3 64.2 89.6 493 4.00 0.00
Too cold
Pass
Rack_8 61.5 66.6 64.3 89.7 493 4.00 0.00
Too cold
Pass
Rack_9 61.5 66.6 64.6 90.0 493 4.00 0.00
Too cold
Pass
Rack_10 61.4 67.7 64.9 90.3 494 4.00 0.00
Too cold
Pass
Rack_11 61.3 70.0 65.4 90.9 494 4.00 0.00
Too cold
Pass
Rack_12 61.3 72.2 65.9 91.4 495 4.00 0.00
Too cold
Pass
Rack_13 61.2 73.8 66.0 91.4 494 4.00 0.00
Too cold
Pass
Rack_14 61.0 74.1 65.4 90.8 493 4.00 0.00
Too cold
Pass
Rack_15 60.8 73.5 64.2 89.6 492 4.00 0.00
Too cold
Pass
RackRow_33 Rack_1 60.3 71.2 62.9 88.0 497 4.00 0.00
Too cold
Pass
Rack_2 60.3 75.8 65.2 90.6 493 4.00 0.00
Too cold
Pass
Rack_3 60.4 76.5 66.9 92.3 495 4.00 0.00
Too cold
Pass
Rack_4 60.4 75.6 67.0 92.4 495 4.00 0.00
Too cold
Pass
Rack_5 60.5 71.8 66.4 91.8 494 4.00 0.00
Too cold
Pass
Rack_6 60.6 69.0 65.0 90.4 493 4.00 0.00
Too cold
Pass
Rack_7 60.6 66.1 63.2 88.6 491 4.00 0.00
Too cold
Pass
Rack_8 60.9 62.8 61.8 87.2 490 4.00 0.00
Too cold
Pass
Rack_9 61.0 62.8 62.1 87.5 490 4.00 0.00
Too cold
Pass
Rack_10 61.0 64.6 63.1 88.5 491 4.00 0.00
Too cold
Pass
Rack_11 61.0 65.5 63.7 89.1 492 4.00 0.00
Too cold
Pass
Rack_12 61.0 69.4 64.8 90.2 493 4.00 0.00
Too cold
Pass
Rack_13 60.9 73.6 66.3 91.7 494 4.00 0.00
Too cold
Pass
Rack_14 60.8 74.5 66.3 91.7 494 4.00 0.00
Too cold
Pass
Rack_15 60.7 74.3 65.3 90.7 493 4.00 0.00
Too cold
Pass
RackRow_32 Rack_1 60.4 67.4 62.8 87.9 497 4.00 0.00
Too cold
Pass
Rack_2 60.5 72.9 64.8 90.2 493 4.00 0.00
Too cold
Pass
Rack_3 60.6 75.2 67.2 92.6 495 4.00 0.00
Too cold
Pass
Rack_4 60.7 74.8 67.5 92.9 495 4.00 0.00
Too cold
Pass
Rack_5 60.8 69.9 66.2 91.6 494 4.00 0.00
Too cold
Pass
Rack_6 60.8 67.8 64.7 90.1 493 4.00 0.00
Too cold
Pass
Rack_7 60.5 65.2 62.6 88.1 491 4.00 0.00
Too cold
Pass
Rack_8 60.5 62.6 61.8 87.3 490 4.00 0.00
Too cold
Pass
Rack_9 60.4 63.9 62.6 88.0 491 4.00 0.00
Too cold
Pass
Rack_10 60.4 65.8 63.6 89.0 492 4.00 0.00
Too cold
Pass
Rack_11 60.4 67.6 64.4 89.8 492 4.00 0.00
Too cold
Pass
Rack_12 60.3 73.2 66.2 91.7 494 4.00 0.00
Too cold
Pass
Rack_13 60.3 76.1 67.0 92.4 495 4.00 0.00
Too cold
Pass
Rack_14 60.2 76.8 66.3 91.7 494 4.00 0.00
Too cold
Pass
Rack_15 60.2 75.6 64.2 89.6 492 4.00 0.00
Too cold
Pass
RackRow_31 Rack_1 60.3 71.0 63.3 88.4 497 4.00 0.00
Too cold
Pass
Rack_2 60.3 75.3 65.9 91.3 494 4.00 0.00
Too cold
Pass
Rack_3 60.4 75.0 67.0 92.5 495 4.00 0.00
Too cold
Pass
Rack_4 60.4 73.6 66.6 92.0 494 4.00 0.00
Too cold
Pass
Rack_5 60.5 69.2 64.9 90.3 493 4.00 0.00
Too cold
Pass
Rack_6 60.6 65.6 63.7 89.1 492 4.00 0.00
Too cold
Pass
Rack_7 60.6 64.3 62.5 87.9 491 4.00 0.00
Too cold
Pass
Rack_8 60.5 63.2 61.9 87.3 490 4.00 0.00
Too cold
Pass
Rack_9 60.4 65.2 63.2 88.6 491 4.00 0.00
Too cold
Pass
Rack_10 60.4 66.1 64.1 89.5 492 4.00 0.00
Too cold
Pass
Rack_11 60.4 69.5 65.1 90.5 493 4.00 0.00
Too cold
Pass
Rack_12 60.3 75.2 66.5 91.9 494 4.00 0.00
Too cold
Pass
Rack_13 60.3 76.2 66.6 92.0 494 4.00 0.00
Too cold
Pass
Rack_14 60.3 75.7 65.7 91.2 494 4.00 0.00
Too cold
Pass
Rack_15 60.2 73.7 63.8 89.2 492 4.00 0.00
Too cold
Pass
RackRow_30 Rack_1 60.3 71.5 62.8 88.0 497 4.00 0.00
Too cold
Pass
Rack_2 60.3 71.7 64.2 89.6 492 4.00 0.00
Too cold
Pass
Rack_3 60.3 70.2 65.0 90.4 493 4.00 0.00
Too cold
Pass
Rack_4 60.4 69.7 65.4 90.9 493 4.00 0.00
Too cold
Pass
Rack_5 60.4 69.3 65.5 91.0 493 4.00 0.00
Too cold
Pass
Rack_6 60.4 68.3 65.1 90.5 493 4.00 0.00
Too cold
Pass
Rack_7 60.5 66.8 63.8 89.2 492 4.00 0.00
Too cold
Pass
Rack_8 60.5 63.4 61.8 87.2 490 4.00 0.00
Too cold
Pass
Rack_9 60.4 64.4 62.3 87.8 490 4.00 0.00
Too cold
Pass
Rack_10 60.3 67.7 64.4 89.8 492 4.00 0.00
Too cold
Pass
Rack_11 60.3 68.0 65.1 90.5 493 4.00 0.00
Too cold
Pass
Rack_12 60.3 67.4 64.8 90.3 493 4.00 0.00
Too cold
Pass
Rack_13 60.2 68.5 64.7 90.1 493 4.00 0.00
Too cold
Pass
Rack_14 60.2 71.5 64.6 90.0 493 4.00 0.00
Too cold
Pass
Rack_15 60.2 72.2 63.4 88.8 491 4.00 0.00
Too cold
Pass
RackRow_29 Rack_1 60.2 67.6 62.1 87.3 496 4.00 0.00
Too cold
Pass
Rack_2 60.2 67.5 62.8 88.2 491 4.00 0.00
Too cold
Pass
Rack_3 60.2 67.9 63.4 88.8 491 4.00 0.00
Too cold
Pass
Rack_4 60.3 67.9 63.9 89.3 492 4.00 0.00
Too cold
Pass
Rack_5 60.3 67.0 63.6 89.1 492 4.00 0.00
Too cold
Pass
Rack_6 60.3 65.2 63.0 88.4 491 4.00 0.00
Too cold
Pass
Rack_7 60.3 64.2 62.4 87.8 490 4.00 0.00
Too cold
Pass
Rack_8 60.3 62.2 61.2 86.6 489 4.00 0.00
Too cold
Pass
Rack_9 60.2 63.8 61.9 87.3 490 4.00 0.00
Too cold
Pass
Rack_10 60.2 65.7 63.3 88.7 491 4.00 0.00
Too cold
Pass
Rack_11 60.2 66.2 63.6 89.1 492 4.00 0.00
Too cold
Pass
Rack_12 60.1 66.9 63.7 89.1 492 4.00 0.00
Too cold
Pass
Rack_13 60.1 67.0 63.4 88.8 491 4.00 0.00
Too cold
Pass
Rack_14 60.1 67.0 62.8 88.2 491 4.00 0.00
Too cold
Pass
Rack_15 60.1 67.9 62.1 87.5 490 4.00 0.00
Too cold
Pass
RackRow_28 Rack_1 60.3 63.1 61.2 86.3 495 4.00 0.00
Too cold
Pass
Rack_2 60.3 65.5 61.6 87.1 490 4.00 0.00
Too cold
Pass
Rack_3 60.4 65.4 62.1 87.5 490 4.00 0.00
Too cold
Pass
Rack_4 60.4 65.5 62.4 87.8 491 4.00 0.00
Too cold
Pass
Rack_5 60.4 65.5 62.7 88.1 491 4.00 0.00
Too cold
Pass
Rack_6 60.4 65.4 62.5 88.0 491 4.00 0.00
Too cold
Pass
Rack_7 60.4 64.3 61.6 87.1 490 4.00 0.00
Too cold
Pass
Rack_8 60.4 61.7 60.9 86.3 489 4.00 0.00
Too cold
Pass
Rack_9 60.3 62.8 61.4 86.8 490 4.00 0.00
Too cold
Pass
Rack_10 60.3 64.6 62.3 87.8 490 4.00 0.00
Too cold
Pass
Rack_11 60.3 65.7 62.7 88.2 491 4.00 0.00
Too cold
Pass
Rack_12 60.2 66.2 62.7 88.1 491 4.00 0.00
Too cold
Pass
Rack_13 60.2 66.2 62.3 87.7 490 4.00 0.00
Too cold
Pass
Rack_14 60.2 65.5 61.5 86.9 490 4.00 0.00
Too cold
Pass
Rack_15 60.2 62.6 60.8 86.2 489 4.00 0.00
Too cold
Pass
RackRow_27 Rack_1 60.2 62.5 61.1 86.2 495 4.00 0.00
Too cold
Pass
RackRow_26 Rack_1 60.2 66.5 62.1 87.2 496 4.00 0.00
Too cold
Pass
RackRow_25 Rack_1 60.3 70.6 63.1 88.3 497 4.00 0.00
Too cold
Pass
RackRow_24 Rack_1 60.4 71.0 63.5 88.6 497 4.00 0.00
Too cold
Pass
RackRow_23 Rack_1 60.7 70.7 62.8 87.9 497 4.00 0.00
Too cold
Pass
RackRow_22 Rack_1 60.2 63.2 60.7 85.9 495 4.00 0.00
Too cold
Pass
RackRow_21 Rack_1 60.2 63.5 61.6 86.7 496 4.00 0.00
Too cold
Pass
RackRow_20 Rack_1 60.2 65.9 61.6 86.8 496 4.00 0.00
Too cold
Pass
RackRow_19 Rack_1 60.3 63.7 62.0 87.1 496 4.00 0.00
Too cold
Pass
RackRow_18 Rack_1 60.3 62.5 61.5 86.7 496 4.00 0.00
Too cold
Pass
RackRow_17 Rack_1 60.2 61.7 61.1 86.3 495 4.00 0.00
Too cold
Pass
RackRow_16 Rack_1 60.1 61.1 60.6 85.8 495 4.00 0.00
Too cold
Pass
RackRow_15 Rack_1 60.5 65.2 61.7 86.8 496 4.00 0.00
Too cold
Pass
RackRow_14 Rack_1 60.1 61.0 60.6 85.7 495 4.00 0.00
Too cold
Pass
RackRow_13 Rack_1 60.1 66.7 60.9 86.1 495 4.00 0.00
Too cold
Pass
RackRow_12 Rack_1 60.1 67.1 61.4 86.6 495 4.00 0.00
Too cold
Pass
RackRow_11 Rack_1 60.2 67.0 61.9 87.0 496 4.00 0.00
Too cold
Pass
RackRow_10 Rack_1 60.1 69.0 61.8 86.9 496 4.00 0.00
Too cold
Pass
RackRow_9 Rack_1 60.6 72.6 63.2 88.3 497 4.00 0.00
Too cold
Pass
RackRow_8 Rack_1 60.6 69.9 62.7 87.8 497 4.00 0.00
Too cold
Pass
RackRow_7 Rack_1 60.7 63.1 62.5 87.6 496 4.00 0.00
Too cold
Pass
RackRow_6 Rack_1 60.2 64.8 61.4 86.5 495 4.00 0.00
Too cold
Pass
RackRow_5 Rack_1 60.3 64.0 61.8 86.9 496 4.00 0.00
Too cold
Pass
RackRow_47 Rack_1 60.2 64.3 61.7 86.8 496 4.00 0.00
Too cold
Pass
RackRow_48 Rack_1 60.3 65.4 61.7 86.9 496 4.00 0.00
Too cold
Pass
RackRow_49 Rack_1 60.2 66.5 61.3 86.4 495 4.00 0.00
Too cold
Pass
RackRow_50 Rack_1 60.2 61.6 61.0 86.1 495 4.00 0.00
Too cold
Pass
RackRow_51 Rack_1 62.9 65.0 64.1 89.2 498 4.00 0.00
Too cold
Pass
Total 115,338 936.00 0.00

1 ASHRAE 2008 inlet temperature for class 1 servers: recommended 64.4 to 80.6 °F, allowable 59.0 to 90.0 °F. A rack passes when its coldest and warmest inlet readings are both inside the range.

Red rows: racks whose warmest inlet is above the recommended maximum. Blue rows: racks whose coldest inlet is below the recommended minimum. A rack with both is red.

Liquid cooling rejects 0.00 kW, 0.0% of the rack heat.

Airflow

How the air moves through the room, from the solved flow. Drag to turn the model. Slice cuts through it at any height or position; Air paths follows air out of the cooling units, out of the racks, or into the warmest racks.

Cooling units

18 cooling units supply 117,013 cfm and remove 936.96 kW in all.

All cooling units 18
Type CRAC Mean return
temperature
°F		 Mean supply
temperature
°F		 Supply flow
cfm		 Static pressure
in H2O		 Heat removal
kW		 Deviation from mean1
%
Down Flow CRAC_17_1 86.8 60.0 6,501 0.0194 56.14 7.9
CRAC_16_1 86.8 60.0 6,501 0.0181 56.15 7.9
CRAC_15_1 86.8 60.0 6,501 0.0199 56.26 8.1
CRAC_14_1 87.7 60.0 6,501 0.0198 58.03 11.5
CRAC_13_1 86.6 60.0 6,501 0.0227 55.73 7.1
CRAC_12_1 84.5 60.0 6,501 0.0217 51.30 −1.4
CRAC_11_1 82.3 60.0 6,501 0.0260 46.70 −10.3
CRAC_10_1 82.0 60.0 6,501 0.0253 46.07 −11.5
CRAC_9_1 84.1 60.0 6,501 0.0255 50.56 −2.9
CRAC_8_1 85.2 60.0 6,501 0.0198 52.82 1.5
CRAC_7_1 86.3 60.0 6,501 0.0194 55.16 6.0
CRAC_6_1 87.1 60.0 6,501 0.0181 56.82 9.2
CRAC_5_1 86.9 60.0 6,501 0.0183 56.31 8.2
CRAC_4_1 86.3 60.0 6,501 0.0186 55.09 5.8
CRAC_3_1 84.5 60.0 6,501 0.0212 51.33 −1.4
CRAC_2_1 82.2 60.0 6,501 0.0265 46.59 −10.5
CRAC_1_1 82.3 60.0 6,501 0.0247 46.85 −10.0
CRAC_0_01 83.8 65.0 6,501 0.0272 39.05 −25.0
Total 117,013 936.96
Mean 85.1 60.3 6,501 52.05

1 (unit heat removal − mean heat removal) ÷ mean heat removal.

Room mean pressure: −0.0032 in H2O.

Heat removal in red is more than the unit’s rated cooling capacity.

Ceiling grilles

7 ceiling grilles carry 122,729 cfm in all.

Grille Open area
%		 Mean temperature
°F		 Flow rate1
cfm
Grille_0 50 82.7 19,943
Grille_1 50 83.7 19,301
Grille_2 50 85.8 17,277
Grille_3 50 87.3 16,932
Grille_4 50 87.2 16,359
Grille_5 50 87.4 16,890
Grille_6 50 86.7 16,026
Total 122,729

1 A negative flow comes into the room from the ceiling plenum.

Energy

No COP was entered before the run, so PUE, DCiE, facility power and operating cost are not worked out here. The energy calculator works them out from a COP you enter.

COP
not entered
coefficient of performance, as entered
PUE
n/a
power usage effectiveness
DCiE
n/a%
data center infrastructure efficiency
Total facility power
n/a kW
RTI1
98.6%
return temperature index
RCIHI1
100.0%
rack cooling index, high side
RCILO1
28.9%
rack cooling index, low side
Annual operating cost
n/a

1 RTI and RCI are trademarks of ANCIS Inc.

Energy calculator

Try other figures here. The run’s figures stay as they are.

COP
PUE
DCiE%
Total facility power W
Annual operating cost

Run details

What was simulated and how the solution was checked. Every residual reached its target, and the heat entering the room and the heat leaving it balance to better than 0.01% of the rack heat.

Questions about this run? Mail support@coolsimsoftware.com and quote project 80314. The link starts a message with this run’s details in it.
Simulation
ModelExample Data Hall
Project number80314
SimulatedSeptember 9, 2026
Mesh densityFine
Mesh cells655,782
CPUs1
Solution check
ResultConverged
Heat imbalanceunder 0.01% of rack heat, limit 1%
Mass residual7.9e-4, target 1e-3
Energy residual5.5e-7, target 1e-6
Velocity residual, largest6.8e-5
Room
LayoutNon-raised Floor with Ceiling Plenum
Dimensions124.11 × 57.49 × 11.75 ft
Floor area7,134.9 ft²
Return plenum height1.75 ft
CRAC units
Count18
Total supply flow117,013 cfm
Total heat removed936.96 kW
Racks
Rows47
Count234
Total flow115,338 cfm
Total heat load936.00 kW
Ceiling grilles
Count7

Reading this report

The result and the colors

Each rack is judged by the air entering its inlet face, at its coldest and its warmest point, against the ASHRAE 2008 ranges for class 1 servers: recommended 64.4 to 80.6 °F, allowable 59.0 to 90.0 °F.

Colder than allowablesome inlet air below the allowable range
Colder than recommendedovercooled: safe for the servers, more cooling than they need
In recommended rangeevery inlet point inside the recommended range
Warmer than recommendedsome inlet air above the recommended range
Warmer than allowablesome inlet air above the allowable range: a risk to the servers

A rack that is both too warm and too cold counts as too warm. Equipment is drawn grey; only air and heat carry color.

The four indices

Cooling capacity in use
Heat removed by the running cooling units, as a share of what they are rated for. Above 100% the model asks more of them than their rating.
Return temperature index, RTI
Supply air against the air the racks draw. 100% is matched; below it cold air bypasses the racks, above it hot air recirculates to their inlets.
Rack cooling index, high and low
100% means no rack inlet is above the recommended maximum (high) or below the recommended minimum (low). The further below 100%, the more racks are outside and the further out they are.

Getting around

Sections
The bar at the top jumps to a section and shows where you are. A line with an arrow opens a longer list or table.
Rack model
On a wide screen the rack map is a model. A rack’s colored face is where it takes air in; the dark face opposite is where the air leaves. Drag the model to turn it, and click a rack to open its line in the list. Show flat drawing swaps to the map as it prints, which colors every rack’s top. Where the run recorded the air entering each rack unit, or a rack is modeled server by server, the model opens with each unit or server in its own color; point at one for its temperatures. Whole rack gives each rack one color, as the list does.
Airflow
Drag to turn the model, scroll to zoom, right-drag to move. Slice cuts the room in plan or section; Air paths traces where air goes. Save picture saves the view, or one of the flow pictures under it, as an image with its color scale.
Tables and printing
Download CSV under a table saves it for a spreadsheet. Print makes a PDF of the whole report.
Help
Run details has the project number to quote and a link that mails support with it.