Carrier Evergreen 23XRV Chiller contributes to Tokio Marine Centre’s achieving best-in-class air conditioning chiller plant system efficiency

Carrier’s innovative Evergreen® 23XRV tri-rotor screw chiller contributed to Tokio Marine Insurance Singapore Ltd recently achieving a breakthrough in chiller plant system efficiency at its new office building in Singapore. The building recorded a system efficiency of 0.508 ikW/RT (input kW per refrigerant ton). Input kilowatt per refrigeration ton is a commonly used measure for energy efficiency for a central commercial air conditioning system. This efficiency is 22 percent better than the 0.65 ikW/RT Singapore Building and Construction Authority (BCA) Green Mark GoldPlus standard, and was verified by an independent consultant. Carrier, the world’s leader in high technology heating, air-conditioning and refrigeration solutions, is a part of UTC Climate, Controls & Security Systems, a unit of United Technologies Corp. (NYSE: UTX).

“This is the best air conditioning system efficiency we have seen in Singapore to date, and we are honored to be part of the design team that achieved this exceptional performance,” said Mr. Lim Jit Seng, President, G-Energy Global Pte Ltd, Energy & Sustainable Design Consultant.

At the heart of the new chiller system are two 560-ton Carrier’s Evergreen® 23XRV “Foxfire” high efficiency VFD tri-rotor screw chillers.  The Carrier Evergreen® 23XRV “Foxfire” high efficiency VFD tri-rotor screw chiller is an innovative commercial air conditioning product that is capable of delivering high energy efficiency and low operational cost, achieving 20 to 40 percent higher part load performance against other water-cooled screw products. The chiller has recently been certified as a leader, receiving “4 ticks” under the Green Building Product Certification by the Singapore Green Building Council (SGBC).  This is the highest rating achieved to-date under the water-cooled chillers product group.

“Carrier Singapore engineers worked closely with the consultants and project owner from the initial design stage to determine the best configuration for this building. With application of high efficiency products, such as the Evergreen 23XRV chiller, we were able to meet the customer’s requirements and match both water and airside design to achieve such high efficiency. The new Carrier Evergreen VSS technology enables chillers to attain extraordinary efficiency level while using environmentally sound HFC-134a refrigerant,” said Mr. Chong Wai Yen, Commercial General Manager, Carrier Singapore.

For more information on Carrier’s commercial products and solutions, visit

About Carrier

Carrier is the world’s leader in high technology heating, air-conditioning and refrigeration solutions. Carrier experts provide sustainable solutions, integrating energy efficient products, building controls, and energy services for residential, commercial, retail, transport and food service customers. Founded by the inventor of modern air conditioning, Carrier improves the world around us through engineered innovation and environmental stewardship. Carrier is a part of UTC Climate, Controls & Security Systems, a unit of United Technologies Corp., a leading provider to the aerospace and building systems industries worldwide. Visit for more information.


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