Schneider Electric Uniflair Chilled Water InRow Cooling closely couples cooling with the heat source thereby improving predictability and efficiency. With intelligent controls that actively adjust to match the load, the Uniflair CW InRow addresses the dynamic demands of today’s IT environments. Available in various configurations, these units meet the diverse requirements for data center cooling. IT operators looking to improve efficiency or deploy higher density equipment will benefit from the modular design ideal for closets, server rooms, and data centers.
To meet the diverse requirements of IT environments, the Uniflair Chilled Water InRow RC products are available in two sizes, 300mm and 600 mm wide cabinets. Optional humidification and reheat is available in select units.
Uniflair air-cooled condensers support InRow cooling products to provide a complete solution for small to medium data centers.
Uniflair Chilled Water InRow Benefits
- Design prevents hot air recirculation, while improving cooling predictability and allowing for a pay as you grow environment
- Modular Design allows for future deployment of higher density equipment
- Intelligent controls actively adjust fan speed and water flow to match the IT heat load to maximize efficiency
- Modular Components simplify replacement and reduce mean time to repair
- Row based equipment allows for all serviceable components to be replaced/maintained in the hot or cold aisles
- Easy to maintain, cleanable, deep loading mesh filter removes particles from the return air stream
- Active Response Controls monitor and actively adjust cooling capacity to ensure proper server inlet temperatures
Uniflair Chilled Water InRow Models
The Schneider Electric InRow Chilled Water product line was refreshed in April 2026 with the launch of the ACRC331 series. Because chilled water units use water or glycol as the heat transfer fluid in the unit itself, they are not directly subject to the EPA refrigerant transition that is reshaping the InRow DX line — but the new ACRC331 platform is also where Schneider Electric’s current capacity, efficiency, and integration improvements are being introduced.
Current-Generation Model — ACRC331 Series
The ACRC331 replaces the ACRC301H. It delivers 40 kW of cooling capacity in a 300mm format — a 9% increase over the ACRC301H — and is designed for medium- to high-density applications including AI and HPC environments. Four variants are available, distinguished by their control valve type and humidification configuration:
ACRC331P2B — InRow RC, 300mm CW, P-model (reheat and electrode humidifier), 2-way pressure-independent EPIV with flow meter, 200-240V, 1ph, 50/60Hz
ACRC331P3B — InRow RC, 300mm CW, P-model (reheat and electrode humidifier), 3-way valve with shutoff, 200-240V, 1ph, 50/60Hz
ACRC331S2B — InRow RC, 300mm CW, standard configuration, 2-way pressure-independent EPIV with flow meter, 100-120V or 200-240V, 1ph, 50/60Hz
ACRC331S3B — InRow RC, 300mm CW, standard configuration, 3-way valve with shutoff, 100-120V or 200-240V, 1ph, 50/60Hz
Suffix key — P-model: includes reheat and electrode humidifier (first available in 300mm CW with the ACRC331). S-model: standard configuration without reheat or humidifier. 2B: 2-way EPIV (pressure-independent control valve) with flow meter — reduces operating costs by eliminating the need to manually balance flow. 3B: traditional 3-way valve with shutoff.
Additional features of the ACRC331 series: ultra-efficient adiabatic humidifier (Title 24 compliant for California and Washington), simplified condensate handling (no dewpoint control pump required), and integrated ATS for redundant power feeds.
Legacy Models — Previous Generation Chilled Water InRow
The following models remain available where compatible with existing installations. The ACRC301H is being replaced by the ACRC331 for new installations.
ACRC301H — InRow RC, 300mm, CW, 208-230V, 50/60Hz (replaced by ACRC331 series)
ACRC301S — InRow RC, 300mm, CW, 100-240V, 50/60Hz
ACRC600 — InRow RC, 600mm, CW, 200-240V, 50/60Hz
ACRC600P — InRow RC, 600mm, CW, 200-240V, 50/60Hz, with humidifier
ACRC601 — InRow RC, 600mm, CW, 460-480V, 60Hz
ACRC601P — InRow RC, 600mm, CW, 460-480V, 60Hz, with humidifier
For replacement planning involving the ACRC301H or the larger 600mm ACRC600 series, contact Power Solutions at 800-876-9373 to discuss specification, sizing, and timing.
Related reading: Organizations evaluating their full InRow cooling strategy in 2026 — particularly those considering whether to transition from R410A DX to chilled water rather than wait for higher-capacity R32 successors — may find our companion educational article useful: The R410A Refrigerant Transition in Data Center Cooling.
For more information about Schneider Electric Cooling,
call 800-876-9373 or email [email protected].