02/12/2026

Green Cooling Initiative: Towards Climate-friendly Cooling

Leapfrogging describes the transition from ozone-deplet ing substances to natural refrigerants without detouring via transitional technologies.

This review of 13 years of leapfrogging in cooling technology shows how the IKI is supporting the transition to climate-friendly refrigerants.

The refrigeration and air conditioning sector accounts for up to 10% of global greenhouse gas emissions. The Green Cooling Initiative (GCI) has contributed to raising international awareness on the significant mitigation potential. Through its three phases (2012-2025), GCI has supported its partners worldwide in accelerating the transformation of the cooling sector towards energy efficient technologies using natural refrigerants. The project worked along three pillars: capacity building, policy advise, and technology transfer. 

Video: Green Cooling for a Warming World 

Capacity Building: Training Skilled Workers in Kenya

A woman stands in front of a refrigeration unit.
Mercy Njuki, trainer, stands in front of Kenya's first commercial CO₂ refrigeration system with ejector technology, which is intended for use in supermarkets. The ejector uses waste heat and pressure differences to recover energy and reduce power consumption.

“Natural refrigerants are the future, so it is important that our students learn how to handle them. This expertise increases their chances on the labour market.”, says Mercy Njuki, a trainer for refrigeration and air conditioning at The Nairobi National Polytechnic, Kenya.

The Green Cooling Initiative equipped The Polytechnic and 27 other Kenyan training institutes with tools and devices for practical training. Furthermore, the project revised curricula and supported partner countries in developing more formalised qualification, certification, and registration systems.

A skilled workforce is key to achieving a green transition in the cooling sector, because qualified technicians know how to safely handle climate-friendly natural refrigerants, how to avoid leakages, and how to enhance energy efficiency. In the third phase alone, GCI trained more than 1,700 technicians and stakeholders. One focus was on female empowerment.

Policy Advice: Developing National Cooling Strategies

Four people are sitting at a table with papers and discussing something.
Workshop on minimum standards for energy efficiency in Uganda.

GCI supported the development of national cooling strategies and the updating of standards. These lay the foundation for adapting to rising temperatures while avoiding rising emissions. The refrigeration and air conditioning sector was embedded into the Nationally Determined Contributions (NDCs) under the Paris Agreement in several partner countries, with the Seychelles’ chapter on cooling emerging as a best-practice example for others.

Numerous publications, from short brochures to in-depth reports, provide policymakers with best practice examples, guidelines, and sector specific figures. One example is a report on how to establish a sustainable and climate resilient vaccine cold chain which was elaborated in response to the COVID-19 crisis.

Technology Transfer: Implementing Pilot Projects in Sri Lanka and Kenya

Two flagship pilot projects demonstrated the viability of sustainable cooling in real-world settings: the climate-friendly air conditioning of a hotel in Sri Lanka, implemented in cooperation with the Jetwing Hotel Group, and an environmentally friendly fish cold store in Kenya, contributing to a decentralised and resilient food value chain. Before the cold store was built, local fishermen often had to throw away 40 to 60% of their catch because they had no way to keep the fish cool. Now, five tons of fish can be stored and kept fresh for two to three days. It is climate-friendly, cost-effective and sustainable because it is powered by solar energy, and the ice to cool the fish is made from lake water.

During GCI’s third phase, natural refrigerant technologies were demonstrated through the installation of R290 air conditioning systems in public buildings, hospitals, universities, and training institutes of several partner countries.

Looking Ahead

The Green Cooling Initiative´s work is being continued e.g. by the IKI projects Green Room Air-Conditioning and Cooling Program for Southern Africa.

The GCI was funded by the International Climate Initiative (IKI) and implemented by GIZ in cooperation with training institutes and ministries of the partner countries. The initiative was part of the GIZ Proklima cluster. 
 

Explore more details about the Green Cooling Initiative

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Contact

IKI Office
Zukunft – Umwelt – Gesellschaft (ZUG) gGmbH
Stresemannstraße 69-71

10963 Berlin

iki-office@z-u-g.org

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