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Framework conditions for planning, procuring and operating district heating systems including thermal solar plants.
Fifth-generation district heating and cooling networks based on shallow geothermal energy: a review and possible solutions for Mediterranean Europe.
Recommended by the IIR
Integrating renewable and waste heat and cold sources into district heating and cooling systems. Case studies analysis, replicable key success factors and potential policy implications
Assessing the potential of air-source heat pumps in the Canadian residential sector.
Combined Heating and Cooling in District solutions.
IIR document
Further research in coabsorbent technology: the cooling and heating cogeneration truncated cycles.
Transcritical CO2 refrigeration system integrated with a heat pump for heat export to district heating.
Optimization of a Hybrid Energy System with District Heating and Cooling Considering Off-Design Characteristics of Components, an Effort on Optimal Compressed Air Energy Storage Integration.
Preliminary study of a CO2 district cooling and heating infrastructure at CERN.
Design and optimized operational strategy of a district cooling and heating system based on ground source heat pumps.
Los distritos térmicos en Colombia
Energy Districts in Colombia
Investigation of model predictive control for fifth generation district heating and cooling (5GDHC) substations.
DHC Market Outlook 2023. Insight and Trends.
Large-scale geothermal collector systems for 5th generation district heating and cooling networks.
Clean Energy Technology Observatory: Smart Thermal Networks in the European Union - 2024 Status Report on Technology Development, Trends, Value Chains and Markets.
Refrigeration sector monitoring
193 results
State of play of district heating and cooling in Europe
District heating and cooling can represent an interesting opportunity as part of the decarbonisation of the heating and cooling sector. A study takes stock of existing networks...
5th generation district heating and cooling networks in Europe
A recent generation of district heating and cooling networks is developing in Europe, using low temperature renewable energy heat sources (such as shallow...
District heating and cooling in Europe: the share of renewable energy
District heating and cooling networks continue to expand in Europe, further integrating renewables and waste heat sources.
Heat pumps : the core technology for sustainable heating
A recent report by the IEA highlights that heat pumps are essential to reducing the use of natural gas for heating, while improving energy security, reducing emissions and ensuring...
Radiative cooling: smart materials to switch from heating to cooling
Researchers have developed a radiative thermal management device, composed of several layers of reflective/absorbent materials, capable of switching between heating and cooling...
Renewable energy consumption for heating and cooling in the EU
Over one fifth of energy used for heating and cooling from renewable sources in the EU.
Design and operation of district heating and cooling systems supplied by renewable energy sources
A report published by the European Commission analyses 8 efficient district heating and cooling systems in different Member States.
Renewable energy for heating and cooling in the EU in 2022
The share of renewable energy sources for heating and cooling in the EU increased to 25% in 2022.
Renewable energy for heating and cooling in the EU in 2021
The share of renewable energy sources for heating and cooling in the EU stagnated in 2021, due to the overall increase in gross consumption of all fuels as a result of the post...
Renewable energy for heating and cooling in the EU in 2020
The share of renewable energy sources used for heating and cooling in the EU continues to increase steadily, from 22% in 2019 to 23% in 2020. The share was above 50% in six Member...
Spain: action plans for heating and cooling at local level
In June 2024, la Fundación Renovables issued a guide to promote sustainable cooling in Spanish cities with more than 45,000 inhabitants. Solutions include installing heat pumps,...
Solar heating and cooling: key trends and challenges
In 2020, the solar thermal energy yield amounted to 407 TWh, which correlates to savings of 43.8 million tons of oil and 141.3 million tons of CO2. Although still only a niche market, solar cooling...
The HVACR workforce in the United States
According to the Bureau of Labor Statistics, there were over 800,000 technician and engineer jobs related to heating and refrigeration in the US in 2021.
European Commission: a guide to innovative district heating and cooling solutions.
A comprehensive solution booklet on district heating and cooling by the European Commission covers energy-efficient technologies, regulatory frameworks and business...
United States: October 2024 heating and cooling equipment shipment data
AHRI provides monthly data on heating and cooling equipment shipped by US manufacturers in the US market. The data provided covers the two months prior to the month of release....
IIR news
96 results
Sustainable cooling and heating in India: IIR partners in new INDEE3 project
The INDEE3 project aims to support India’s transition to low-carbon heating and cooling technologies. It promotes the use of natural refrigerants, improves refrigerant lifecycle management, and develops more...
Member news: Danfoss hosts global leaders in sustainable heating & cooling
In April, Danfoss hosted a week dedicated to sustainable heating and cooling. The second day featured Danfoss RACHP Symposium, where IIR Director General Yosr Allouche delivered a keynote presentation,...
Invitation to join the IIR working group: Solid-state cooling and heating
Established last year, this latest IIR working group aims to promote international research collaboration to provide energy efficient and environmentally friendly solutions for a variety of solid-state...
New IIR Working Group on Solid-State Cooling and Heating
Initiated by Andrej Kitanovski (Slovenia), this working group's first objective is to promote international research collaboration in the areas of solid-state cooling, heat pumps, and energy...
Join our training course and officially become a new Ambassador for clean cooling and heating!
Experts and representatives from three sister projects in different regions of the world: ENOUGH in Europe, INDEE+ in India and ACES in Africa are arranging a free one-hour training course on clean cooling and...
New IIR Informatory Note on Air-source heat pumps for space heating and cooling
The IIR has issued a new Informatory Note on Air source heat pumps for space heating and cooling. A summary for policymakers and a Chinese version of this note have also been published.
Register for Free: 51st International HVAC&R Congress and Exhibition
This event brings together representatives from all professions involved in the planning, construction and installation of energy systems in buildings.
IIR wins ECREEE Award for solar cooling and heating efforts in Africa with SophiA
The ECOWAS Sustainable Energy Forum took place in Abidjan, Côte d’Ivoire on November 28-29. The IIR organised a SophiA workshop and was honoured with an ECREEE Award for its outstanding contribution to...
Highlights from the 52nd International HVACR Congress and Exhibition
The opening ceremony of the 52nd International HVACR Congress and Exhibition was led by the President of the Association for HVAC and by the Vice President of the Serbian Union of Mechanical and...
Beyond Refrigeration – The IOR annual conference 2021 focuses the industry on steps to net zero
This year’s IOR Annual Conference in April tackled one of the biggest issues facing users of refrigeration, air conditioning and heat pumps – the journey to net zero.
Member news: Daikin introduces EWYS-4Z: High-Efficiency Cooling and Heating Solution for Industrial and Commercial Needs
The polyvalent EWYS-4Z cooling and heating unit, which runs on R513A, is designed for superior energy efficiency and reduced noise for industrial and commercial applications.
Discover the winners of the prestigious awards presented at the 51st HVAC&R Congress and Exhibition
Despite being organised under particular circumstances this year, the Congress maintained high interest from key refrigeration stakeholders across Europe.
Adapting to Rising Temperatures: Highlights and Proceedings from the 1st IIR International Adaptation Conference
The 1st IIR International Conference on Refrigeration: Adapting to Rising Temperatures, held from 10–13 August 2025 at the University of Manchester, brought together over 120...
Working Group on the thermal management systems for electric vehicles
The IIR has decided to set up a working group on this subject. Experts from different countries are invited to join. We need you!
Heat pumps, the central theme of the recent IIR Congress
An overview of the research carried out in the field of heat pumps, with the aim of achieving greater flexibility and increased energy efficiency, in particular through to the use of thermal energy...
Encyclopedia of Refrigeration
3 results
Additive manufacturing of regenerators for caloric cooling
In many areas of engineering, additive manufacturing allows the production of complex and multifunctional products that could not be manufactured using traditional methods. In the...
Hydrocarbon refrigerants
Hydrocarbons such as R290 (propane), R600a (isobutane) or R1270 (propene/propylene) are low GWP non-toxic natural refrigerants with excellent thermodynamic properties. They offer an...
Liquefied Natural Gas: production process and cold energy recovery
Liquefied natural gas (LNG) is natural gas that has been cooled to about -160 °C and turned into a liquid to facilitate transportation and storage. A typical LNG supply chain...
