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Response to Climate Change

Low Environmental Impact Refrigerants

Response to Climate Change

Low Environmental Impact Refrigerants

Working Toward Practical Application of Diversity of Next-Generation Refrigerants

The refrigerant conveys the heat between the indoor unit and the outdoor unit of air conditioners. Although HFC, currently the most widely used refrigerant in developed countries, has zero ozone depletion potential, it contributes to global warming if released into the atmosphere.

Daikin is accelerating the practical use of next-generation refrigerants that have less of an impact on global warming than conventional refrigerants. In the selection of refrigerants, we focus not only on their direct effect on global warming but also on their effects throughout the life cycle, including energy efficiency during air conditioner use. We make decisions based on all contributing factors: besides the environmental impact of the refrigerant itself, we look at safety factors such as flammability and toxicity, the cost and availability of the refrigerant, and the cost of producing air conditioners that use the refrigerant.

Daikin's View: Evaluation Index of Refrigerant Selection (common for all application)

Daikin's View: Evaluation Index of Refrigerant Selection (common for all application)

Choosing the Best Balanced Refrigerant for Each Application to Mitigate Environmental Impact

Different characteristics are required of refrigerants, depending on whether they are used in, for example, residential or commercial air conditioners, water and space heaters, or refrigeration equipment. That is why we have spent years conducting research that will enable the selection of refrigerant that is ideal for each application. We have so far conducted research on next-generation refrigerants such as natural refrigerants and HFC refrigerants, and have considered their application in products.

Using the knowledge we have built up, we are providing information worldwide at events such as international conferences, academic conferences, and exhibitions, as well as through research paper presentations, on the global warming impact of refrigerants and measures against it.

Daikin's Refrigerant Direction

Daikin's Refrigerant Direction
Other refrigerants not listed above are also applied in products outside of Daikin's portfolio

Protecting the Ozone Layer

Focusing on Converting to Alternative Refrigerants and Recovering Fluorocarbons

HCFCs used to be the most commonly used refrigerant, but in the 1980s experts suspected it was depleting the ozone layer, so under the Montreal Protocol developed nations agreed to phase out its production in developed countries by 2020. Daikin's chemicals business has for years worked to mitigate ozone layer destruction by developing alternative refrigerants that do not deplete the ozone layer. In 1991 we began the first mass-production in Japan of HFC, a refrigerant with zero ozone depletion potential, and in 1995, under our air conditioner business we developed and began selling air conditioners that use HFC as the refrigerant.

Daikin's Action on Refrigerant and Goals

Daikin's Action on Refrigerant and Goals

Kigali Amendment

In October 2016, at the 28th Meeting of the Parties to the Montreal Protocol, members voted to phase down the CO2 equivalent total of HFCs, which, despite not harming the ozone layer, have a high GWP. With this, HFCs, which were covered by the Paris Agreement adopted at the 21st Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP21) but were not part of the Montreal Protocol, thus became part of the Montreal Protocol, due to the success of efforts to completely eliminate HCFCs. There is also a regulation on the CO2 equivalent total of production and consumption of HFCs. This decision is called the Kigali Amendment, after the Kigali, the capital city of Rwanda, where the conference was held. The Amendment had exceeded the threshold for ratification by at least 20 countries at the end of 2017, thus it came into effect on January 1, 2019.

A major point of the Kigali Amendment is that it is not meant to phase out HFCs but rather phase down the production and consumption of HFCs based on their GWP value. The amount of HFC will not be restricted but rather reduced in terms of total GWP of CO2 equivalent (weight of HFC in Kg x GWP value). By using lower GWP HFCs, it is possible to maintain or increase the use amount of HFC itself while reducing the overall global warming impact. In enacting the Kigali Amendment, developed countries are implementing reductions based on the common phase-down schedule starting in 2019. The Amendment divides developing countries into three groups, which plan to implement reductions individually.

Upon the introduction of new refrigerants, the Amendment requires an increase in efficiency of air conditioners in addition to a phasing down of HFCs in terms of total GWP.

Daikin is pursuing the following measures in response to the Kigali Amendment.

  1. Daikin welcomes the Kigali Agreement for an HFC phase down in CO2 equivalent under the Montreal Protocol.
  2. The main tenet of Daikin's policy is "diversity of refrigerants." And there is no ideal "one-size-fits-all" refrigerant solution for all applications, because many criteria need to be assessed such as the ODP and GWP value of the refrigerant and safety, energy consumption, availability, affordability, resource efficiency, recyclability, recoverability and total global warming impact of the equipment.
  3. Daikin has identified R-32 as a very beneficial refrigerant for single and multi-split air conditioners, packaged air conditioners and heat pumps. Daikin believes that the transition to R-32 will help to meet both the HFC phase down schedule and the HCFC phase out schedule. Daikin is now in the process of evaluating and identifying suitable refrigerants for other applications.
  4. To mitigate future global climate change, it is important to take a "Sooner the Better" approach. Early implementation is a key to the further reduction of future impact. As soon as the most balanced and feasible solution for an application is found, Daikin will commercialize and disseminate the technology to contribute to the efforts to mitigate global climate change.
  5. Also, while taking a "Sooner the Better" approach, as a refrigerant manufacturer, Daikin will continue to seek the "optimal refrigerant" for every type of application for further mitigation of global climate change.

Mitigate the Global Warming Impact

Promoting the Use of R-32, a Refrigerant with Lower Global Warming Potential

In November 2012, Daikin became the first company in the world to launch residential air conditioners using R-32 (HFC) for the Japanese market; R-32 has just one-third the global warming potential of conventional R-410A (HFC) refrigerant. In 2013, we released residential air conditioners using R-32 in India. Since then, we have been expanding these R-32 air conditioners in other countries and increasing products using R-32.

To encourage the adoption of R-32 globally and to help mitigate global warming, Daikin began offering patents related to the manufacture and sales of air conditioners that use R-32 free of charge to companies worldwide.

In addition, Daikin provides technical support in emerging countries by cooperating with governments and international organizations. We provide information and technical support through international conferences, academic conferences, and papers on the impact and countermeasures in relation to refrigerants and global warming. For example, in India, Thailand, and Malaysia, seminars were held for government officials and air-conditioning industry groups to promote understanding of R-32, and we conducted training for local air-conditioning installation and service technicians on the appropriate handling of R-32. In Mexico and Brazil, Daikin was commissioned by the Japan International Cooperation Agency (JICA) to begin projects, including the distribution of air conditioners with R-32 refrigerant and initiatives to create energy-efficient markets.

As a result, Daikin has sold more than 39 million R-32 air conditioners in over 120 countries. It is estimated that, including the products of other companies, the worldwide R-32 air conditioner market exceeds 210 million units, whose contribution to CO2 emissions reduction is estimated at 340 million tons (calculated by Daikin as of June 2022).

Cumulative Total of R-32 Air Conditioners Sold by Daikin (As of June 2022)

Over 39 million air conditioners sold in more than 120 countries worldwide
(Approx. 15 million in Japan and 24 million overseas)

Cumulative Total of R-32 Air Conditioners Sold by Daikin


Patent Non-Assertion Pledge for Equipment Using Low Global Warming Potential Refrigerant R-32

As a result of a series of evaluations and reviews based on international discussions, Daikin has identified R-32, which has a global warming potential about one third that of conventional refrigerants, as an optimal refrigerant for today’s residential and commercial air conditioners. As such, Daikin has been promoting the spread of R-32 worldwide. Daikin has made 93 applied patents for R-32 air conditioners related to the manufacture and sale available to emerging countries in 2011 and to the rest of the world in 2015. In July 2019, we made a non-assertion pledge to offer free access to around 180 patents for R-32 air conditioners related to the manufacture and sales. In July 2021, this pledge was further extended to include 123 more patents.

Moreover, in December 2019 we participated in WIPO GREEN* and registered these patents in WIPO GREEN's database in March 2020. By promoting the quick spread of R-32 through our participation in this mechanism that encourages technology sharing and mutual utilization by introducing sustainable technologies broadly to the world, we will help to mitigate environmental impact of refrigerants around the world.

One organization of the UN's World Intellectual Property Organization (WIPO) with the mission to speed up the adoption of solutions for environmental issues.

Development and Verification of New Technology Promoting the Spread of CO2 Conveni-Pack

Daikin began selling Conveni-Pack in 2007. This system combines air conditioning and refrigerating functions into one system aimed at convenience stores and supermarkets. Conveni-Pack is a system that uses Daikin's proprietary inverter and refrigerant control technologies to recover waste heat from refrigeration display cabinets for use in heating. Compared to conventional methods using separate air conditioning and refrigerating functions, Conveni-Pack is able to reduce annual electricity consumption by around 50% under the climate conditions of Europe.

CO2 Conveni-Pack uses CO2 refrigerant with a global warming potential of 1 in place of the conventional R-410A refrigerant. In January 2020, Daikin began demonstration testing of CO2 Conveni-Pack using a subsidy* from the EU. The testing will cover a three-year plan and involve verifying the safety and efficiency of the system after steadily rolling it out at retail shops in Belgium, Germany and Spain.

Projects approved for the LIFE Programme implemented by the EU for the environment and climate action receive a subsidy to defray 55% of the their costs.

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