Hotmaps toolbox

Heating and cooling in residential and industrial sectors accounts for half of the EU’s energy consumption. More than 80% of heating and cooling is still generated from fossil fuels [1]. Meanwhile, heat losses are also significantly high. This sector needs to be transformed! Hotmaps is a website, which allows you to provide within 5 minutes a first estimation of heating and cooling demand in your region and the potentials of local renewable energy to cover this demand. Subsequently, by using more detailed data and applying its calculation modules, you are able to elaborate much more comprehensive heating and cooling strategies. What we offer is an open source online software that supports planning processes of the energy sector on the local level in a transparent manner. We provide:

  • a starting data set,
  • customisations of the software for your specific needs,
  • training and support services.

Thanks to this software, you will be able to take practical decisions in your area of interest (village, town, city, etc.). We applied and demonstrated the values of the Hotmaps website in seven pilot areas. The website was developed by leading research institutions across Europe together with cities. Go on the website by clicking HERE and discover your city’s climate neutral energy future.

How to use the Hotmaps toolbox for heating and cooling planning

Welcome to the Hotmaps Wiki!

The Hotmaps Wiki hosts the documentation, guidance and manual of the Hotmaps toolbox. It consists of three main parts: 1. Data sets 2. General toolbox functionalities, 3. Calculation modules, 4. Developers section.

General toolbox functionalities guide the user through the interface of the toolbox. The section covers all general aspects of the toolbox, which are related to the user experience, e.g. navigating through different parts of the toolbox, layer selection, retrieving indicators, data upload and export functionalities etc.

The calculation module section, on the other hand, provides an in-depth explanation of concepts and methodologies behind the calculation modules. Besides the explanation of the methodology, the provided examples and test runs for each calculation module help the user to obtain understanding of input parameters and obtained results. Currently, only few calculation modules have been integrated into the toolbox. The calculation module section will expand further by integration of new calculation modules.

The developers section contains all information required for developers to contribute to the Hotmaps toolbox or to understand how it works. It explains amongst all the IT infrastructure of the Hotmaps toolbox, data set integration, contribution in calculation module development etc.

The Hotmaps Wiki is a living document, i.e. it grows as the Hotmaps toolbox grows. The Hotmaps developers continue updating Hotmaps Wiki pages by introduction of new updates, improvements, functionalities and calculation modules.

We hope you enjoy exploring the toolbox and find it helpful for your heating and cooling planning!

Data sets

General tool functionalities and structure

Calculation modules

Each calculation module can be used to analyse different parts of the heating and cooling system and different analysis questions. The calculation modules can also be used as a chain of tools to derive scenarios for heating and cooling of defined regions / areas. For the demonstration of the Hotmaps toolbox the calculation modules are used according to the following toolchain:

For developers



[1] EU H2020 Project: Mapping and analyses of the current and future (2020 - 2030) heat-ing/cooling fuel deployment (fossil/renewables). WP1 Report. 2016. accessed via