CoolSim · Summary 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

In range

every inlet point inside the range

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, highRCI_HI 100.0% Good 50 90 95 100 100% = no rack inlet above the recommended maximum temperature.	Rack Cooling Index, lowRCI_LO 28.9% Poor 50 90 95 100 100% = no rack inlet below the recommended minimum temperature.

Findings

Racks	234 of 234	racks 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.
Racks	0 of 234	racks 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.
Cooling	97%	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.
Energy	Not computed	PUE and annual cooling cost need the cooling system’s COP, which was not entered for this model.

RTI, RCI_HI and RCI_LO are trademarks of ANCIS Inc. · Every rack, cooling unit and grille is listed in the tables below.

Example Data Hall · Summary Report

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: racks are colored only if the air they take in is a risk to the servers

Colder than allowable

below 59.0 °F

0 racks

Safe

59.0–80.6 °F

234 racks

Warmer than recommended

80.6–90.0 °F

0 racks

Warmer than allowable

above 90.0 °F

0 racks

The color is the rack’s warmest inlet point, or its coldest when that is the only one outside the range, as in the Rack Cooling Report. Grey is safe: every point inside the ASHRAE allowable range and none warmer than recommended. 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.

Racks furthest outside the recommended range on average

Rack row	Rack	Coldest inlet °F	Average inlet °F	Warmest inlet °F	Average outside range by °F	ASHRAE recommended
RackRow_14	Rack_1	60.1	60.6	61.0	3.8	Too cold
RackRow_16	Rack_1	60.1	60.6	61.1	3.8	Too cold
RackRow_22	Rack_1	60.2	60.7	63.2	3.7	Too cold
RackRow_28	Rack_15	60.2	60.8	62.6	3.6	Too cold
RackRow_28	Rack_8	60.4	60.9	61.7	3.5	Too cold
RackRow_44	Rack_1	60.2	60.9	62.7	3.5	Too cold
RackRow_13	Rack_1	60.1	60.9	66.7	3.5	Too cold
RackRow_44	Rack_9	60.4	61.0	62.1	3.4	Too cold
RackRow_50	Rack_1	60.2	61.0	61.6	3.4	Too cold
RackRow_44	Rack_8	60.4	61.0	61.6	3.4	Too cold

224 more racks draw some air outside the range. All 234 racks, with flow rate, power and exit temperature, are in the tables below.

How the air moves

The room's solved airflow. Turn the model, move the slice, and trace air from the cooling units, the rack exhausts, or into the warmest racks.

Appendix

Rack cooling

All racks 234

Rack row	Rack	Inlet temperature °F			Mean exit temperature °F	Flow rate cfm	Heat load kW	Liquid cooling kW	ASHRAE inlet range
Rack row	Rack	Min	Max	Mean	Mean exit temperature °F	Flow rate cfm	Heat load kW	Liquid cooling kW	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.

Heat rejected by liquid cooling	0.00 kW
Share of rack heat rejected by liquid cooling	0.0%

Cooling units

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.

Energy

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	RCI_HI¹ 100.0% rack cooling index, high side	RCI_LO¹ 28.9% rack cooling index, low side	Annual operating cost n/a

¹ RTI and RCI are trademarks of ANCIS Inc.

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.

Energy calculator

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

Use a COP Use measured power

COP Total fan power (W) Other power (W)

Measured cooling power (W) Measured fan power (W) Measured other power (W)

Electricity cost (per kWh)

COP
PUE
DCiE	%
Total facility power	W
Annual operating cost

Ceiling grilles

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.

Model and room

Simulation
Model	Example Data Hall
Simulated	September 9, 2026
Mesh density	Fine
Mesh cells	655,782
CPUs	1

Room
Layout	Non-raised Floor with Ceiling Plenum
Dimensions	124.11 × 57.49 × 11.75 ft
Floor area	7,134.9 ft²
Return plenum height	1.75 ft

CRAC units
Count	18
Total supply flow	117,013 cfm
Total heat removed	936.96 kW

Racks
Rows	47
Count	234
Total flow	115,338 cfm
Total heat load	936.00 kW

Ceiling grilles
Count	7