
Bringing Super-EfficientAir Conditioners to the Market Insights from field testing in India and the path forward Developed by the Global Cooling Efficiency Accelerator|April 2025 Authors and Acknowledgments Authors Ankit KalankiYash Shukla,Centre for Advanced Research in Building Science and Energy, CEPT University, IndiaSrilekhya Vennamaneni Authors listed alphabetically. All authors from RMI unless otherwise noted. Contact Ankit Kalanki,akalanki@rmi.org Copyrights and Citation Ankit Kalanki, Yash Shukla, and Srilekhya Vennamaneni,Bringing Super-Efficient Air Conditioners to theMarket: Insights from field testing in India and the path forward, RMI, 2025,https://rmi.org/insight/bringing-super-efficient-air-conditioners-to-the-market. RMI values collaboration and aims to accelerate the energy transition through sharing knowledge andinsights. We therefore allow interested parties to reference, share, and cite our work through the CreativeCommons CC BY-SA 4.0 license.https://creativecommons.org/licenses/by-sa/4.0/. All images used are from iStock.com unless otherwise noted. Acknowledgments The authors thank the following individuals for their insights and perspectives on this work (names listedalphabetically): Aun Abdullah,LodhaChao Ding,Lawrence Berkeley National LaboratoryTarun Garg,RMI India FoundationCharlotte Matthews,RMIIan McGavisk,RMIWon Young Park,Lawrence Berkeley National LaboratorySneha Sachar,Clean Cooling CollaborativeNihar Shah,Lawrence Berkeley National LaboratoryLaurie Stone,RMI This work was conducted in partnership with Lodha, one of the largest real-estate developers in India. Theauthors express their gratitude to the supporters of this work. About Global Cooling Efficiency Accelerator The Global Cooling Efficiency Accelerator is a coalition of scientists and cooling experts working to establishthe necessary preconditions and scientific data-based evidence to pave the way for bringing super-efficientair conditioners (ACs) to the marketplace. The Global Cooling Efficiency Accelerator consists of partners withdeep technical and policy expertise and brings together policymakers, manufacturers, industry and marketexperts, and buyers to shape the market for commercialization and adoption of super-efficient ACs. About RMI Rocky Mountain Institute (RMI) is an independent, nonpartisan nonprofit founded in 1982 that transformsglobal energy systems through market-driven solutions to secure a prosperous, resilient, clean energyfuture for all. In collaboration with businesses, policymakers, funders, communities, and other partners,RMI drives investment to scale clean energy solutions, reduce energy waste, and boost access to affordableclean energy in ways that enhance security, strengthen the economy, and improve people’s livelihoods. RMIis active in over 60 countries. Table of Contents Executive Summary5 Introduction: The Cooling Challenge8 Laying the Groundwork for Super-Efficient ACs10 The Global Cooling Prize10The Global Cooling Efficiency Accelerator10 Field Testing of Super-Efficient ACs13 Testing methodology13Testing conditions14Testing units15Testing results16 Endnotes23 Executive Summary Record-breaking temperatures, rapid urbanization, and a growing middle class are creating a significantincrease in demand for air conditioning. Currently, space cooling accounts for nearly 20% of global buildingelectricity use worldwide,1and it is projected to be the second largest single-use driver of electricitydemand growth between 2023 and the end of the decade (only behind electric vehicles).2Adopting today’sair conditioning systems worldwide would create enormous stress on the grid and generate more than100 gigatons of CO2equivalent emissions by 2050 — more than double today’s annual global emissions.3Addressing this challenge is a matter of human health, comfort, and equity, and is crucial for our ability toadapt to the changing climate. Nowhere is this challenge — and opportunity — more pronounced than in India. Already the world’sfastest-growing air conditioning market, India is projected to have over 1 billion room air conditioners(ACs) in operation by 2050, increasing its electricity demand for cooling ninefold compared with2022. Widespread adoption of current AC technology could jeopardize both the power grid and theenvironment. Therefore, India has an urgent need and a great opportunity to be a pioneer in theinnovation of cooling technologies. In 2021, the Global Cooling Prize — an innovation challenge focused on identifying the best possibleresidential cooling technology — successfully demonstrated prototypes that had a five times lower climateimpact than typical units in the market and delivered greater comfort at a significantly lower life-cycle cost.This is possible through ACs that use highly efficient components, are optimized for managing humidity,and incorporate low global warming potential refrigerants. These super-efficient ACs use many-timesless energy th