Lightstream Screw II air-cooled chiller

Kaltra set to launch next-generation screw chillers

Kaltra has overhauled its screw-compressor chillers to deliver higher operational efficiency with the new Lightstream Screw II range. Improvements include the latest screw compressors by Bitzer with smooth capacity regulation, redesigned refrigeration circuit, and evaporators.

The new ErP 2021 (Tier-2) compliant range delivers 250 to 1850kW cooling with an energy efficiency of up to 3.56 for 7/12° water and 35°C ambient air. Seasonal efficiency (ESEER) is as high as 4.89.

With four refrigerants available, of which three are lower GWP (R513a, R450a, and HFO-1234ze), Lightstream Screw II air-cooled chiller is also a solution addressing environmental sustainability. Further, the range offers improved sound performance and is also smaller in footprint compared to predecessor models. As with earlier models, the new units are equipped with Kaltra’s low-volume microchannel condenser coils contributing to less refrigerant charge.

The first orders are already signed for Lightstream Screw II chillers running on HFO-1234ze to be supplied in Scandinavia this month.

Air-cooled models with variable-speed screw compressors, Lightstream Screw II Inverter, will be available in Q2 2021.

Headquartered in Germany and Austria, Kaltra designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillersprecision air conditionersIT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensersdry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminium coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.

For more information on Kaltra and its products call +49 (0) 89 943 99-8-66 or visit