Air-cooled data center chillers
23 of 32 vendors sell air-cooled chillers for data centers. 20 of them offer free cooling, 19 use oil-free compressors and 17 offer an HFO or natural refrigerant. The warmest supply water stated is 35 °C (Carrier). Capacity ranges below cover every line a vendor lists, water-cooled lines included.
| Compressors | Refrigerants | Free cooling | AI or high-density claim | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Trane | 4001 | 21,0002 | Oil-free magnetic-bearing centrifugal; centrifugal; variable-speed screw | R-1234ze; R-513A; R-134a; R-1233zd; R-515B | Yes | — | — | Yes | 2026-11-11 |
| Hitachi Cooling & Heating | — | 12,3102 | Two-stage centrifugal (S, VG); oil-free magnetic-levitation (VM) | R-513A; R-1233zd; R-1234ze; R-134a | — | — | — | — | 2026-11-11 |
| Daikin Applied | 3021 | 10,5511 | Variable-volume-ratio screw; Variable-speed oil-free magnetic-bearing | R-1234ze(E); R-515B; R-513A; R-1233zd(E) | Yes | 29.41 | — | — | 2026-11-11 |
| Dunham-Bush | 2641 | 10,5501 | Inverter-driven dual-stage, oil-free magnetic-bearing | R-134a; R-513A | — | — | — | — | 2026-11-11 |
| Vertiv | 3001 | 6,0004 | Inverter screw; oil-free magnetic-levitation centrifugal | R-1234ze; R-513A; R-515B; R-134a | Yes | — | — | Yes | 2026-11-11 |
| Carrier | 1701 | 3,8001 | Scroll; variable-speed screw; two-stage magnetic-bearing centrifugal | R-513A; R-1234ze(E); R-515B; R-32 | Yes | 353 | 1802 | Yes | 2026-11-11 |
| Johnson Controls (YORK) | 8804 | 3,5004 | Single-stage magnetic-bearing centrifugal, variable-speed | R-1234ze | — | 303 | 1801 | Yes | 2026-11-11 |
| Multistack | — | 2,9891 | Two-stage variable-speed centrifugal MagLev | — | Yes | — | — | — | 2026-11-11 |
| Smardt | 2111 | 2,5001 | Oil-free magnetic-bearing | R-513A; R-515B; R-1234ze; R-134a | Yes | — | — | — | 2026-11-11 |
| Uniflair (Schneider Electric) | 1,2001 | 2,5001 | Oil-free magnetic-bearing centrifugal | — | Yes | 331 | 1801 | Yes | 2026-11-11 |
| Midea Building Technologies | 5631 | 2,2511 | Two-stage magnetic-bearing centrifugal; inverter screw | R-1234ze(E); R-513A | Yes | — | — | Yes | 2026-11-11 |
| Geoclima (Munters) | — | 2,2001 | Oil-free centrifugal Turbocor with magnetic levitation | R-513A; R-134A; R-1234ze | Yes | — | — | — | 2026-11-11 |
| LG Electronics | 1,6881 | 2,1101 | Semi-hermetic oil-free magnetic-bearing centrifugal, variable-speed | R-513A | Yes | — | — | Yes | 2026-11-11 |
| Airedale by Modine | 1101 | 2,0002 | Oil-free centrifugal Turbocor | R-1234ze; R-134a | Yes | 262 | — | — | 2026-11-11 |
| ENGIE Refrigeration | 2501 | 2,0001 | Oil-free magnetic-bearing | — | Yes | — | — | — | 2026-11-11 |
| STULZ | 2801 | 1,8601 | Screw (stepless or frequency-converter); Turbocor | R-1234ze; R-513A | Yes | 251 | — | — | 2026-11-11 |
| Kaltra | 2501 | 1,8501 | 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 | Magnetic-levitation centrifugal; oil-free magnetic-bearing | R-1234ze; R-515B | Yes | 263 | — | Yes | 2026-11-11 |
| Aermec | 2001 | 1,6001 | Screw (NSM HWT); Turbocor magnetic-levitation (TBA/TBG) | R-134a; R-513A; R-1234ze; R-515B; R-32 | Yes | 301 | — | — | 2026-11-11 |
| Euroklimat | 1901 | 1,4001 | Oil-free magnetic-levitation Turbocor | R-134a; R-513A; HFO option | Yes | — | — | — | 2026-11-11 |
| Galletti | 3701 | 1,2001 | Hermetic scroll | R-410A | Yes | — | — | — | 2026-11-11 |
| Swegon (BlueBox) | 2201 | 4801 | Scroll | R-32 | Yes | 201 | — | — | 2026-11-11 |
| Clivet | — | — | Magnetic, full inverter | — | Yes | — | — | — | 2026-11-11 |
The lines behind each row
All 32 vendorsHow to read the columns
Methodology- Smallest unit kW
- Lowest published cooling capacity across the chiller lines named in the 'Lines' field, converted from refrigeration tons at 3.517 kW per ton where the vendor publishes tons. Rating conditions differ by vendor and line, so compare ranges, not decimals. Blank when no line states a lower bound.
- Largest unit kW
- Highest published cooling capacity of a single chiller across the lines named in 'Lines', converted from tons at 3.517 kW per ton where needed. Project totals, multi-unit plants and announced-only products are excluded. Blank when not published.
- Compressors
- Compressor technologies in the named lines, as the vendor words them: scroll, screw, centrifugal, magnetic-bearing (oil-free) centrifugal.
- Refrigerants
- Refrigerants the vendor lists for the named lines. A refrigerant may be offered only on some sizes or markets; the record's sources say which.
- Free cooling
- The vendor offers integrated or optional free cooling (outside air or a water-side economiser) on at least one named line. It does not mean the compressors stay off all year.
- Max supply water °C
- Highest chilled-water supply (leaving) temperature the vendor states for a named line. A rating point is not an operating limit and is not used here. Blank when not stated.
- Full-load recovery s
- Seconds from a power interruption to full cooling output, as the vendor states it for a named line.
- AI or high-density claim
- The vendor names AI, high-density or liquid-cooled data centers as a target of a named line, on a page cited in the record's sources. Blank means no such claim was found on the pages read.