Johnson Controls Introduces QWC4 Water-Cooled Screw Chiller

Johnson Controls, the global leader for smart, healthy and sustainable buildings, announced the Quantech QWC4 Water-Cooled Screw Chiller has been added to the brand’s expanded chiller portfolio. 

The Quantech QWC4 chiller uses variable speed drive technology to reduce energy costs and carbon emissions by as much as 30% when compared to traditional chillers. Throughout most locations, the variable speed drive saves energy during 99% of operating hours spent at off-design conditions, which include reduced load and/or reduced entering condenser water temperature.

Johnson Controls Quantech QWC4 Water-Cooled Screw Chiller. 

Since the Quantech QWC4 screw chiller is capable of handling a higher-pressure lift than a centrifugal chiller, it can be used in both thermal-storage and heat-pump applications. The variable speed drive technology provides the chiller flexibility in handling high-lift applications with the highest efficiencies available. This allows the chiller to use a wide range of heat-rejection methods, including an open cooling tower, dry cooler, adiabatic cooler, heat recovery or heat pump.

The Quantech QWC4 chiller also reduces environmental impacts by directly managing refrigerant charges and potential leak points. The chiller utilizes the R-134a refrigerant, which has zero ozone-depletion potential, and features an innovative design that reduces the number of potential leak points by 35% when compared to conventional compressor designs. It also incorporates a falling-film evaporator that allows for refrigerant charge to be lowered by as much as 30% compared to standard chillers.

The Quantech QWC4 chiller supports OpenBlue Healthy Buildings by Johnson Controls – a complete suite of connected solutions that delivers impactful sustainability, new healthy occupant experiences and respectful safety and security to many industries including workplaces, hospitals, schools, enterprises and more.  

About Johnson Controls
At Johnson Controls, we transform the environments where people live, work, learn and play. As the global leader in smart, healthy and sustainable buildings, our mission is to reimagine the performance of buildings to serve people, places and the planet. With a history of more than 135 years of innovation, Johnson Controls delivers the blueprint of the future for industries such as healthcare, schools, data centers, airports, stadiums, manufacturing and beyond through its comprehensive digital offering OpenBlue. With a global team of 100,000 experts in more than 150 countries, Johnson Controls offers the world's largest portfolio of building technology, software as well as service solutions with some of the most trusted names in the industry. For more information, visit