TESSA Documentation
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Introduction
Getting Started
User Guide
Concepts
Reference
Support Assistant
TESSA Documentation
Introduction
Introduction
Introduction
Feature list
Getting Started
Getting Started
Key concepts at a glance
1. Create your account and project
2. Create a scenario
3. Define your study area
4. Create a district
5. Build a thermal network
6. Generate the pipe layout
7. Dimension pipes and simulate
8. Explore the results
9. Next steps
User Guide
User Guide
Projects and scenarios
Projects and scenarios
Manage projects
Manage scenarios
Phasing plans
Sharing and permissions
Import and export scenarios
Study area
Study area
Draw layers on the map
Import GeoJSON, KML, or GPKG
Define exclusion zones
Buildings and demand
Buildings and demand
Create a district — workflow overview
Load buildings from a region
Upload a buildings table
Use OpenStreetMap building data
Add or edit buildings on the map
Filter, cluster, and set active connections
Work with building load curves
Apply future climate and retrofit assumptions
Climate
Climate
Load climate data
Apply future climate scenarios
Network design
Network design
Create a thermal network
Energy centers and thermal sources
Multiple sources and allocation strategies
Add and dimension pumps
Auto-generate the pipe layout
Extend an existing network
Draw pipes manually
Import an existing network
Dimension pipes
Substations and connection points
Optimise the network layout
Simulate network operation
Geothermal
Geothermal
Create a borehole field
Dimension a borehole field
Optimise borehole regeneration
Booster heat pumps for ambient networks
Costs and financials
Costs and financials
Configure costs
Upload vendor cost tables
Revenues and tariffs
Read the financial report
Reports and exports
Reports and exports
Report overview
Export results
Share and print a report
Comparing and iterating
Comparing and iterating
Compare scenarios
Duplicate scenarios for variant studies
App and navigation
App and navigation
Map controls
The object tree
Keyboard shortcuts and power-user tips
Login and access
Interoperability
Interoperability
Supported file formats
Connect an AI assistant (MCP)
Google Maps geocoding caveats
Round-tripping with QGIS
FAQ
Concepts
Concepts
Projects, scenarios, and the data model
Districts and buildings data model
Networks and heat sources data model
Building data origins
Heat demand model
Cooling demand model
Climate data
CO2 and local pollutant emissions
Network generations (1G–5G)
Network sizing and hydraulics
Heat loss and simulation
Multiple sources and allocation
Geothermal borehole fields
Financial model
Layout optimisation
Data quality and confidence
References and further reading
Reference
Reference
Tools
Tools
Tools reference
District and buildings
District and buildings
Create district from region
Create district from buildings
Extract buildings
Filter buildings
Filter districts
Cluster buildings
Merge districts
Reload district buildings
Refresh district data
Set active building connections
Set building heat source
Simulate future demand
Simulate annual demands
Simulate building load curves
Layers
Layers
Combine feature layers
Combine building selections
Climate
Climate
Load climate data
Network layout and topology
Network layout and topology
Create MST layout
Create DHN from linestrings
Extend network layout
Optimize layout
Fix network topology
Cut thermal network
Merge thermal networks
Connect substations
Create building substations
Locate energy centers
Connect energy centers
Pipe sizing and simulation
Pipe sizing and simulation
Dimension pipes
Looped pipe sizer
Simulate network operation
Borehole and geothermal
Borehole and geothermal
Generate borehole layout
Optimize borefield layout
Dimension borehole field
Borehole temperature input
Optimize borehole field regeneration
Dimension booster heat pumps
Calculate thermal source power
Selectors and helpers
Selectors and helpers
District selector
Network selector
Layer selector
Borehole field selector
Building data source selector
Exclusion zone selector
Heat model selector
Cooling model selector
Allocate thermal source loads
Max connect distance input
Query builder
Data
Data
Buildings
Buildings
Building data template
Building variables glossary
Building archetypes reference
Climate
Climate
Climate data reference
Energy sources
Energy sources
Energy sources reference
Network
Network
Pipe specifications
Cost table format
Network import format
Load curves
Load curves
Load curve format
Exports
Exports
Export formats
Conventions
Conventions
Units and conventions
Coordinate systems
Swiss data coverage
Support Assistant
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