The Hotmaps team just published a set of “how to” documents to support the users of the software.
You can access them below:

• Summary of the Hotmaps Handbooks for strategic heat planning
• Handbook 1 – Definition & experiences of strategic heat planning
• Handbook 2 – Guidance for comprehensive assessment of efficient heating and cooling
• Appendix report to the Handbook for strategic heat planning: Case descriptions

In addition, a Hotmaps Wiki for using the Hotmaps toolbox for strategic heat planning is online and will be regularly updated.