Hot|Cool magazine

Why HOT|COOL?

Welcome to Hot|Cool, the premier district heating and cooling technology magazine. Each month, we bring you in-depth articles written by experienced professionals covering the latest ideas and developments in the field. With a readership of over 5,000 in over 70 countries, we are proud to be the go-to source for those who want to stay informed about state-of-the-art district heating and cooling. Our mission is to provide readers with the most comprehensive and up-to-date information and be the best district heating magazine in the world!

If you’re passionate about district heating and cooling, you won’t want to miss an issue of Hot|Cool.

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Upcoming themes

  • Digitalisation
  • Put your end-users first: The Customer is Always King!
  • Maintenance & Renovation
Digitalization & Smart Choices in District Heating HOT|COOL NO.3/2025

Preface: Smart Choices Drive Sustainable Heating! By Lars Hummelmose, Managing Director, DBDH
Duration Curves and How They Should Influence the Choice of Heat Production Capacity By Morten Jordt Duedahl, Business Development Manager, DBDH


It’s not just the Grass That’s Greener Next Door – Their Heating might be, too! By Elsebeth Arendt, Head of District Heating, Kredsløb, DK
A Future Perspective on the Digitalizaton of the District Energy Systems By Michele Tunzi, Associate Professor at DTU, and Dietrich Schmidt, Innovation Field Manager, Fraunhofer IEE
Geothermal Energy: Revolutionizing District Heating for a Sustainable Future By Søren Berg Lorenzen, Director of Sales, Innargi
Twin Pipes Offering the Lowest Total cost of Ownership By Sabrina Fröhlich, Head of Marketing & PR, Isoplus Group, Jens Rasmussen, Head of Technical Department, Isoplus DK and Gregor Felgner, Project Manager, Isoplus DE
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District Cooling HOT|COOL NO.2/2025

Editorial: Building a Sustainable Future: Why Municipalities Should Establish Their Own Heating Companies By Michiel de Wit, Process Manager District Heating at the Municipality Súdwest-Fryslân and Sacha de Haan, Process Leader heat transition at the
Municipality Súdwest-Fryslân

How to hatch a SWAN: Lessons from the First Six Months Developing the UK’s New Heat Network Zone By Charlotte Owen,
Growth Director, Hemiko


Driving Decarbonisation in Europe: Act!onHeat Charts a Path for Sustainable Heating and Cooling By Lucy Mears, Communications Expert, Strategic Communications, Membership and Advocacy, ICLEI Europe
District Energy in Burnaby, Canada By James Lota, General Manager of Lands and Facilities at the City of Burnaby
Podcast Exploring Aquathermal Energy with WaterWarmth By Lesia Logvynenko, Project Manager, DBDH
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District Cooling HOT|COOL NO. 1/2025

Editorial: Do You Remember this Card Game? By Morten Jordt Duedahl and Hanne Kortegaard Støchkel, DBDH
Bjæverskov District Heating Company: Volunteer-led District Heating Company Brings Sustainable Warmth to 1,000 Buildings By Lars Gullev, VEKS

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Missing Actors in the Heat Market: Business Models, Storage, Waste Heat HOT|COOL Special Collection edition no. 2/2024

Preface: Do you remember this card game? By Morten Jordt Duedahl, Business Developer, DBDH and Hanne Kortegaard Støchkel, Project Development Manager, DBDH
Large Thermal Energy Storage (LTES) will Help Shape the Future Energy Landscape By Geoffroy Gauthier,
Energy and Calculation Engineer – Project Manager, PlanEnergi


The Missing Actor in the Heat Market: How to fill the Gap in Germany By Susanne Schmelcher, Director of Department for Districts & Cities, German energy agency DENA
Low-Temperature District Heating for Old and New Buildings By Niels Hansen, Senior Consultant, Albertslund Municipality
The Challenge of District Cooling: Turning Vision into Reality By Jakob Bjerregaard, Partner and Lea Riber Junge, Junior Consultant, DEVCCO
Electrification of Space Heating – District Heating is Often the Intelligent Solution By Lars Gullev, Senior Consultant, VEKS,  Hanne Kortegaard Støchkel, Researcher and Project Development Manager, DBDH, Jesper Koch, Head of Analysis, Grøn Energi 
Clarification of the term “District Heating Generations” By Dr. Robin Wiltshire, Chair, IEA DHC programme, Dr. Andrej Jentsch, IEA DHC Programme Manager, and Senior consultant Lars Gullev, Vice-chair, IEA DHC programme
Energy Storage and Smart Energy Systems By Toke Kjær Christensen, Ph.D., Department of Sustainability and Planning, Aalborg University
Waste Heat – the Overlooked Resource Waiting to be Harnessed By Oddgeir Gudmundsson and Jan Eric Thorsen,
Directors, Climate Solutions, Danfoss A/S
District Cooling Implementation in Indonesia: A Gateway to Collaboration By Rana Yusuf Nasir and Rahman Wirajaya, AP Buildings
How Does the End-User’s Behavior Influence the Operating Temperatures in District Heating Networks? By Michele Tunzi, Associate Professor, DTU Construct
Tom Diget, Chief Operating Officer, Viborg DHC,  Kees van der Veer, Vice President, IT and Software, Brunata,  Anders Nielsen,
Application Manager, Grundfos

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How to establish a DH company? Special Collection edition no. 1/2023

First things first, by Steen Schelle Jensen, Head of Business Development, Kamstrup
Artificial intelligence in district heating, by Henrik Madsen, Professor and Section Head on DTU Compute
Cooperative district heating in the making, by Rie Christiansen Krabsen, Marketing Manager, EBO Consult and Gerwin Verschuur, Program Manager Buurtwarmte in Cooperation Energie Samen

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Conversion from Gas and How to Get Started? Special Collection edition no. 1/2022

Green versus black heat: One night changed the agendaby Lars Gullev, VEKS 
Heat plan Denmark 2021 – a CO2 neutral heat supplyby Peter Sorknæs, Steffen Nielsen, Brian Vad Mathiesen, Diana Moreno, Jakob Zinck Thellufsen, and Henrik Lund
IRR – Internal Rate of Return and how it affects the development of city-wide DH projectsby Morten Jordt Duedahl, DBDH, and Lars Gullev, VEKS

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The Growing Markets – Special Collection edition no. 2/2022

It’s time to change our narrative! By Anton Koller, Divisional President District Energy & Buildings and Leanheat Software Suite, Danfoss Climate Solutions
Design of base load heat sources in District Heating networks, by John Tang Jensen, Senior Policy Advisor, Clean Heat Directorate, BEIS
A 10-Points plan to accelerate the EU heat transition, by By Aurélie Beauvais, Managing Director, Euroheat & Power

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