Air-cooled Chillers

Hitachi air-cooled chillers, many of which have a modular design, are widely used in medium-sized commercial applications such as offices and hotels.

A scalable and cost-effective HVAC solution

Hitachi air-cooled chiller systems are designed to be flexible, scalable, and cost-effective HVAC solutions. They are perfect for projects with limited space or where installing a water-cooled chiller is impractical or costly. These systems eliminate the need for a cooling tower, have lower maintenance requirements, and offer a wide range of capacities for different project sizes. Additionally, businesses can easily adjust to changing cooling needs by expanding capacity without major system changes, making Hitachi air-cooled chillers a scalable and cost-effective solution.

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Our air-cooled chillers offer multiple compressor types to meet applications' ne

Hitachi air-cooled chillers offer a range of benefits and application uses, with each type of chiller having unique features and strengths that cater to specific cooling needs:

  • Air-cooled Scroll Chillers offer high seasonal efficiency and low noise levels, ideal for small to medium-sized cooling applications.

  • Air-cooled Rotary Chillers offer a compact design and high energy efficiency for small to medium-sized cooling applications.

  • Air-cooled Screw Chillers provide high efficiency and reliability for larger cooling applications

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Modular design; easily scale capacity as required

A modular design is available for both Hitachi Air-Cooled Scroll and Screw Chillers, making it easy to add additional chillers into the same refrigerant loop to increase capacity as building needs change. These systems are designed to maximize cooling (or heating) capacity in a smaller footprint, delivering nearly 50kW of cooling capacity per square metre of footprint[1].
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An air-cooled chiller system with a wide range of capacities and choices

From 11.2kW over 254kW capacity range[2], Hitachi Air-cooled chillers can meet the needs for both small and large commercial buildings.
With Cooling Only and Heat Pump models (offering cooling or heating modes), Hitachi Air-cooled chillers are ideal for all types of climate.
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Variable Speed Drive control

Most Hitachi air-cooled chillers offer a choice of fixed speed or Variable Speed Drive (VSD) configurations. Hitachi Air-cooled Screw chillers incorporate a twin-screw compressor optimized for R134a refrigerant and the latest version of Hitachi’s screw compressor technology featuring Infinity Capacity Control from 25% to 100%. With this modulation, the compressor load always matches with the requested load, and therefore an accurate chilled water temperature is achieved without expensive inverter devices.
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Low GWP Refrigerant

Hitachi is committed to reducing the environmental impact of its products by using refrigerants with low GWP. Our latest air-cooled scroll chillers use R454B which has a lower GWP then previous refrigerants (3), improved energy efficiency and reduce emissions. This can lead to significant energy savings and lower operating costs over the lifetime of the system.
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User friendly operation and Central Control System

Air-cooled chiller units typically come with a touch screen controller panel and integrated remote management options such as MODBUS, RS-485 or BACNET gateway. These features allow for convenient and efficient control of the chiller unit.
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Precise Control helps saving energy

Samurai M series chillers feature capacity control precision from 6% to 100% in 1Hz/s steps to rival the control precisions of VRF. This means stable water outlet temperatures and faster reaction to sudden changes in loading.
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Quiet Operation

By adapting capacity according to building loads, Hitachi compressors with Variable Frequency Drive (VFD) technology are able to reduce noise output when under partial load. Even at full load, noise levels can be controlled as low as 51dB(A)[4]. A further reduction in the sound level of up to -5 dB(A) is also possible with added insulation panels insulation and further compressor noise insulation[5], enabling Hitachi compressors to meet even the most stringent sound constraints for projects.
Choose your Hitachi Cooling & Heating System


1. Refers to Samurai M models with 125kW output in 2.7sqm footprint.
2. Product availability varies by region. Contact a Hitachi authorized reseller for more details. 11.2kW refers to Samurai S model while 254kW+ refers to Samurai M model

3. R454b refers to Samurai M Air Cooled Chillers 
4. Refers to Samurai M 45kW model sound pressure at 10m
5. Available on certain models. Contact a Hitachi authorized reseller for more details.