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Who is HOTCITY?
HOTCITY is a technology initiative focused on crowdsourcing and mapping waste heat potential in urban environments using citizen smartphones and related digital tools.
- Urban-scale waste heat detection and mapping using a gamified mobile application (smart city / energy data collection).
- Crowdsourcing framework that engages citizens to collect geolocated thermal data for district heating planning (civic-tech / participatory sensing).
- Data analytics and visualization environment for identifying heat sources and supporting energy infrastructure decisions (geospatial analytics / energy planning).
- Collaboration model for municipalities, utilities, and research institutions around low-carbon heating strategies (public sector / energy transition services).
- Open communication and educational content on waste heat reuse and district heating concepts for non-technical stakeholders (public outreach / knowledge sharing).
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More About
HOTCITY operates at the intersection of smart cities, energy planning, and citizen participation, providing a framework for identifying and cataloguing urban waste heat sources that can be connected to district heating or other reuse concepts.
The project centers on a mobile application through which citizens collect geolocated data points in a gamified environment, typically by scanning areas or buildings to identify potential sources of recoverable heat, such as commercial facilities or technical infrastructures.
This participatory sensing approach feeds a backend platform that aggregates, cleans, and analyzes the collected data using standard geospatial information system (GIS) techniques, mapping services, and statistical methods relevant to urban energy mapping.
For municipalities and utilities, HOTCITY’s data outputs can complement conventional heat demand and supply modeling by adding a crowdsourced layer that highlights specific locations where low-temperature waste heat may be available for connection to existing or planned district heating networks.
The platform’s visualizations and maps are typically accessed through web-based interfaces that allow planners and technical teams to overlay waste heat potential with other spatial datasets, such as building stock, land-use zoning, or infrastructure corridors, to support feasibility assessments.
From an architectural perspective, HOTCITY employs smartphone sensors, location services, and server-side components connected via standard internet protocols, integrating with mapping APIs and data storage technologies that are common in smart city applications and energy GIS workflows.
The initiative is positioned for use by public authorities, energy planners, and research organizations that focus on low-carbon heating solutions, district heating expansion, and identification of local energy resources that can reduce reliance on fossil-based heat supply.
Compared with traditional top-down heat mapping based solely on statistical building and infrastructure data, HOTCITY adds a bottom-up, citizen-driven dataset, which can reveal smaller or less-documented heat sources that may not appear in conventional inventories.
In an enterprise or institutional directory, HOTCITY can be categorized under smart city platforms, energy and utilities planning tools, participatory sensing solutions, and geospatial analytics for district heating and waste heat reuse.
Our description of HOTCITY. Updated February 2026.
