High-Efficiency OPT Chillers for Data Centre Cooling
From compact edge units to large free-cooling plants, the OPT range delivers reliable, energy-efficient chilled water for every data centre scale.
Modern data centres need cooling that is efficient, scalable and dependable—whether supporting a small edge site, a modular hall or a high-density AI facility. The OPT chiller range covers capacities from 6 kW up to 1,500 kW+, using proven Daikin inverter technology, free-cooling options and intelligent controls to help lower PUE while maintaining uptime.
Compact Solutions for Edge and Support Loads
OPT-6, OPT-10, OPT-15 and OPT-20
- These compact air-cooled inverter chillers are ideal for edge data centres, modular or containerised deployments, network rooms, UPS spaces and other low-density loads.
- High part-load efficiency with inverter capacity control
- Quiet operation and small outdoor footprint
- Stable temperature control under variable demand
- Straightforward installation with optional integrated hydronics
They provide precise cooling where larger plant equipment is not practical, helping keep distributed sites efficient and reliable.
Flexible Mid-Range Capacity
OPT-50 and OPT-100
- Moving into the mid-size band, these units suit enterprise halls, smaller colocation spaces and supplemental cooling needs.
- Strong efficiency across a wide operating range
- Options for free cooling on selected models
- Compatibility with CRAH units or small liquid loops
- Elevated leaving-water temperatures that improve overall system performance
They offer an excellent balance of capacity, footprint and efficiency for growing facilities.
High-Capacity Free-Cooling Plant Chillers
OPT-150, OPT-250 and OPT-500
These units enter the main free-cooling range designed for data centre plants. Built around inverter-driven screw compressors with refrigerant-cooled variable frequency drives, they deliver outstanding part-load performance and reliability. Free-cooling capability (including glycol-free options) maximises hours without mechanical cooling, with leaving water temperatures up to +30 °C and a wide ambient range for diverse climates. Compact design relative to capacity and rapid-restart options support fast recovery after power events, while multiple units can be sequenced intelligently to match real-time load, optimise free cooling and maintain redundancy.
Large-Scale Solutions for Hyperscale and High-Density Sites
OPT-1000, OPT-1250 and OPT-1500
At the upper end of the range, these chillers support large halls, hyperscale facilities and high-density workloads, including AI clusters. They offer high single-unit capacity within a proven free-cooling platform, with dual independent refrigerant circuits on many models for added reliability. Integration with intelligent plant managers enables multi-chiller optimisation, and they are compatible with high-efficiency CRAH/fan-array units and liquid-cooling architectures (via CDUs). Features such as refrigerant-cooled electronics and active harmonic filters support mission-critical uptime. These machines form the backbone of efficient, large-scale chilled-water plants while supporting both traditional air-side and modern liquid-cooled designs.
Why Choose the OPT Range for Data Centres?
- Efficiency that lowers PUE — Free cooling, inverter technology and high-temperature operation reduce energy use.
- Reliability for continuous operation — Rapid restart, robust compressors and redundant configurations help protect uptime.
- Scalability — Mix sizes and add units as capacity grows, with smart sequencing across the plant.
- Flexibility — Suitable for air-cooled CRAH systems, facility water loops and emerging liquid-cooling needs.
- Proven technology — Built on Daikin’s extensive data centre portfolio and real-world large-scale installations.