Data center chillers, compared
This table compares data center chillers from 32 vendors. The largest single unit listed is 21 MW (Trane), 23 vendors offer free cooling, 22 use oil-free compressors and 10 position a line for AI halls. Every figure links to the vendor’s own page.
Last verified
| Heat rejection | Compressors | Refrigerants | Free cooling | AI or high-density claim | Efficiency (as published) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Trane | 4001 | 21,0002 | Air- and water-cooled | Oil-free magnetic-bearing centrifugal; centrifugal; variable-speed screw | R-1234ze; R-513A; R-134a; R-1233zd; R-515B | Yes | — | — | Yes | GVAF: SEER up to 6.55; seasonal metric, not full-load EER | 2026-11-11 |
| Hitachi Cooling & Heating | — | 12,3102 | Air- and water-cooled | Two-stage centrifugal (S, VG); oil-free magnetic-levitation (VM) | R-513A; R-1233zd; R-1234ze; R-134a | — | — | — | — | Announced range: up to 13.8 ACCOP; vendor-specific annual metric | 2026-11-11 |
| Daikin Applied | 3021 | 10,5511 | Air- and water-cooled | Variable-volume-ratio screw; Variable-speed oil-free magnetic-bearing | R-1234ze(E); R-515B; R-513A; R-1233zd(E) | Yes | 29.41 | — | — | Pathfinder AWV: IPLV above 22 EER; Pathfinder AWM: up to 22.7 IEER (US units) | 2026-11-11 |
| Thermax | 1761 | 10,5511 | Absorption | — | — | — | 351 | — | — | E2 thermal COP 1.1–1.53; heat-input metric, not electric EER | 2026-11-11 |
| Dunham-Bush | 2641 | 10,5501 | Air- and water-cooled | Inverter-driven dual-stage, oil-free magnetic-bearing | R-134a; R-513A | — | — | — | — | — | 2026-11-11 |
| Haier | 4401 | 8,7931 | Water-cooled | Direct-drive magnetic-bearing centrifugal | R-134a | — | — | — | Yes | — | 2026-11-11 |
| Vertiv | 3001 | 6,0004 | Air- and water-cooled | Inverter screw; oil-free magnetic-levitation centrifugal | R-1234ze; R-513A; R-515B; R-134a | Yes | — | — | Yes | — | 2026-11-11 |
| Kirloskar Chillers | 3341 | 4,2201 | — | Magnetic-bearing centrifugal | R-134a; R-1234ze | — | — | — | — | — | 2026-11-11 |
| Carrier | 1701 | 3,8001 | Air- and water-cooled | Scroll; variable-speed screw; two-stage magnetic-bearing centrifugal | R-513A; R-1234ze(E); R-515B; R-32 | Yes | 353 | 1802 | Yes | COP 6.75, IPLV 11.4 under AHRI (AquaEdge 19MV4) | 2026-11-11 |
| Johnson Controls (YORK) | 8804 | 3,5004 | Air-cooled | Single-stage magnetic-bearing centrifugal, variable-speed | R-1234ze | — | 303 | 1801 | Yes | 40% less annual power than other solutions at the same capacity (vendor claim) | 2026-11-11 |
| Multistack | — | 2,9891 | Air-cooled | Two-stage variable-speed centrifugal MagLev | — | Yes | — | — | — | — | 2026-11-11 |
| Smardt | 2111 | 2,5001 | Air- and water-cooled | Oil-free magnetic-bearing | R-513A; R-515B; R-1234ze; R-134a | Yes | — | — | — | — | 2026-11-11 |
| Uniflair (Schneider Electric) | 1,2001 | 2,5001 | Air-cooled | Oil-free magnetic-bearing centrifugal | — | Yes | 331 | 1801 | Yes | EER 4.66 (Schneider Electric’s figure; rating conditions not published) | 2026-11-11 |
| APX DCS (LFB Group) | 501 | 2,4001 | — | Oil-free centrifugal; multi-scroll; inverter screw | R-1234ze; R-454B | Yes | — | — | — | — | 2026-11-11 |
| Midea Building Technologies | 5631 | 2,2511 | Air-cooled | Two-stage magnetic-bearing centrifugal; inverter screw | R-1234ze(E); R-513A | Yes | — | — | Yes | COP up to 7.11 at AHRI conditions (centrifugal line) | 2026-11-11 |
| Geoclima (Munters) | — | 2,2001 | Air-cooled | Oil-free centrifugal Turbocor with magnetic levitation | R-513A; R-134A; R-1234ze | Yes | — | — | — | R513A/R134A example: full-load EER 5.35 at 35°C ambient and 34/24°C water | 2026-11-11 |
| LG Electronics | 1,6881 | 2,1101 | Air-cooled | Semi-hermetic oil-free magnetic-bearing centrifugal, variable-speed | R-513A | Yes | — | — | Yes | EER 4.0 at full load, microchannel heat exchanger | 2026-11-11 |
| Airedale by Modine | 1101 | 2,0002 | Air-cooled | Oil-free centrifugal Turbocor | R-1234ze; R-134a | Yes | 262 | — | — | Up to 39% energy savings over standard methods (TurboChill DCS, vendor claim) | 2026-11-11 |
| ENGIE Refrigeration | 2501 | 2,0001 | Air- and water-cooled | Oil-free magnetic-bearing | — | Yes | — | — | — | — | 2026-11-11 |
| Blue Star | — | 1,9341 | — | Semi-hermetic screw with permanent-magnet motors | R-134a | — | 281 | 601 | — | — | 2026-11-11 |
| STULZ | 2801 | 1,8601 | Air- and water-cooled | Screw (stepless or frequency-converter); Turbocor | R-1234ze; R-513A | Yes | 251 | — | — | — | 2026-11-11 |
| Kaltra | 2501 | 1,8501 | Air-cooled | Screw; scroll | R-134a; R-513A; R-1234ze; R-410A; R-452B; R-454B | Yes | — | — | — | — | 2026-11-11 |
| Mitsubishi Electric (Climaveneta) | 1,2001 | 1,7501 | Air-cooled | Magnetic-levitation centrifugal; oil-free magnetic-bearing | R-1234ze; R-515B | Yes | 263 | — | Yes | — | 2026-11-11 |
| Aermec | 2001 | 1,6001 | Air-cooled | Screw (NSM HWT); Turbocor magnetic-levitation (TBA/TBG) | R-134a; R-513A; R-1234ze; R-515B; R-32 | Yes | 301 | — | — | — | 2026-11-11 |
| Motivair by Schneider Electric | 351 | 1,5831 | — | Screw and scroll options | R-134a; R-410A; R-1234ze; R-513A | Yes | — | — | — | — | 2026-11-11 |
| Euroklimat | 1901 | 1,4001 | Air- and water-cooled | Oil-free magnetic-levitation Turbocor | R-134a; R-513A; HFO option | Yes | — | — | — | — | 2026-11-11 |
| Galletti | 3701 | 1,2001 | Air-cooled | Hermetic scroll | R-410A | Yes | — | — | — | — | 2026-11-11 |
| Swegon (BlueBox) | 2201 | 4801 | Air-cooled | Scroll | R-32 | Yes | 201 | — | — | — | 2026-11-11 |
| Refra | — | 4101 | Water-cooled | — | Propane R-290 | — | — | — | — | — | 2026-11-11 |
| Clivet | — | — | Air-cooled | Magnetic, full inverter | — | Yes | — | — | — | — | 2026-11-11 |
| HiRef | — | — | Water-cooled | Screw | R-513A | — | — | — | — | — | 2026-11-11 |
| Mitsubishi Heavy Industries Thermal Systems | — | — | — | Centrifugal | — | Yes | — | — | Yes | — | 2026-11-11 |
Questions buyers ask
How big is a data center chiller?
Published single-unit capacities run from 35 kW (Motivair by Schneider Electric) to 21 MW. Trane lists 21 MW, Hitachi 12.3 MW and Daikin Applied 10.6 MW. Sort the table by Largest unit or filter by kW. Air-cooled and water-cooled lines are split on the air-cooled and water-cooled pages.
Which chillers make the warmest supply water for AI halls?
Which vendors offer free cooling?
23 of 32 vendors list integrated or optional free cooling, including Trane, Carrier, Vertiv, STULZ. The free-cooling list shows each vendor’s capacity range, supply temperature and refrigerant beside the label.
Which refrigerants do data center chillers use?
The refrigerant names the vendors publish: R-1234ze on 17 vendors’ lines, R-513A on 16, R-134a on 14, R-515B on 7. 22 vendors offer an HFO, HFO-blend or natural refrigerant. GWP is shown only where the vendor prints it: Airedale by Modine, Carrier, Smardt, STULZ. Vendors cite different IPCC reports, so the values are not normalised.
What is an oil-free chiller?
A chiller whose compressor runs on magnetic bearings or a Turbocor-type design, so it needs no lubricating oil. 22 vendors list one, from Smardt to Trane. See the oil-free and magnetic-bearing list.
How this table is built
Full methodologyEvery value comes from the vendor’s own product page, brochure, press release or annual report. The small number next to a figure opens that source. An empty cell means the vendor does not publish the figure, and we do not estimate it.
Capacity covers every line named in the Lines field, converted to kW at 3.517 kW per ton. Each row carries the date we last checked it, newest 11 Nov 2026. Spot a stale number? Email hello@chillervendors.com with the source and we update the row.