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How to build an AC that will get the world through hotter summers
Allyson Chiu and Emily Wright show how inventors in India are working on more efficient residential air conditioning units that cool single rooms. About 1.2 billion units are there across the globe, billions more may be needed to replace the old ones and to meet surging demand in Asia, Latin America and Africa. International Energy Agency estimate is for these AC units to triple by 2050 what they are now, adding 2.4 billion AC units. Using the existing technology and emissions would mean putting 2 billion metric tons of emissions from these older AC units into the atmosphere in 2050 or what 476 million cars put out, says IEA.
The Indian government, RMI, a global coalition including Gree of China, and Daikin of Japan are doing the research on new AC units.
In 2015 about 5% of India's 300 million households had such AC units. 8-10 million units were sold in 2023. This would rise to 1 billion units sold and installed by 2050 says IEA, that would emit 25 gigatons of cumulative emissions in 2050, or what a staggering 6 billion gas powered cars emit.
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