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Quick Keys (Design)
Place boreholeB
Draw fieldP
MeasureM
SelectV
PanH
Fit screenF
Command palette⌘K
New Project
Untitled Project Base Case
API
GX
Select
Place
Layout
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Analysis
Borehole Placement Path
Current path: Layout-only. Next: load building demand.
Location Search
Map Actions
Site Data — GeoSphere AT
Constraints Check
Thermal
Groundwater
Ground Layers
Manual k_s (used when no layers defined)
W/mK
Rb
mK/W
Undist. Tg
C
Geotherm. grad
C/m
Alpha
m2/s
Thermal Response Test
Source
No buildings loaded
Demand and Buildings
Heat Pump Model
Monthly Load Profile ■ Heating ■ Cooling
Aggregate Demand
- kW
Peak Heating
- MWh/yr
- kW
Peak Cooling
- MWh/yr
- m^2
Total Floor Area
0
Buildings
Buildings edit floors and archetype
Archetype Floors Floor m^2 Htg kW Clg kW
Draw a study area to detect buildings
Heat Pump Model
Heating supply T
degC
Cooling supply T
degC
Operation mode
Carnot efficiency eta
-
Min EFT limit
degC
Max EFT (cooling)
degC
Free Cooling
HP Sizing
Capacity / unit
kW
No. of units
Total HP capacity 45 kW
Ground loop load - kW
HP load coverage 100%
COPh @ Tg
-
EERc @ Tg
-
SCOP est.
-
SPF est.
-
COP / EER vs Fluid Temperature
Ground Loop Heat Exchanger
HEX type
Temperature Setpoints & HP Sizing

Heat pump inputs are in the Demand sub-tab under the System & Heat Pump card, shared with the load profile.

°C
°C
kW
Free Cooling
Building Stock
ArchetypeFloorsFloor m2Heat W/m2Cool W/m2
CEA Import
Geometry
Depth
m
Diameter
mm
Spacing
m
Boreholes N
0=auto
Burial depth
m
Config
Fluid and Pipe
Fluid Type
Flow Rate
l/s.bh
Pipe OD
mm
Pipe wall
mm
Fluid temp
degC
Peak power
kW
Header Pipe (optional)
Header length
m
Header OD
mm
Pump eta
-
Flags
TRT weighting
BHE interference
Groundwater
3D end-effects
Grout Type
Thermal Properties
Conductivity
W/mK
Vol. heat cap.
MJ/m³K
Seasonal Thermal Energy Storage
Technology
Volume
m³
H/D ratio
— (opt. 3–4)
T high
°C
T low
°C
U-value
W/m²K
Solar area
m² (0=auto)
Est. Capacity
—
MWh
SVR
—
m⁻¹
Est. Loss
—
%/yr
Placement Workflow
Layout-only 0 placed
Load demand, then generate a borehole array in Layout.
Field Layout
Display
Placed boreholes0
Total depth— m
Low-Temp Thermal Network
4GDH / 5GDHC network design: temperatures, losses, hydraulics, and topology for load-coverage calculation.
Supply T
°C
Design ΔT
K
Pipe length
m (0=auto)
Heat loss coeff.
W/mK
Target velocity
m/s
STES share cap
%
Topology type
Topology goal
Design Flow
—
m³/h
Pipe ID
—
mm
Est. Loss
—
MWh/yr
Auto-route builds a DHNx-style graph topology between buildings, heat pump, storage, and borefield.
Configure how the simulation runs. Closed-loop is the default. Switch to open-loop for groundwater wells.
Setup
Solver
Horizon
years
Load Profile
Loop Model
Mode
G-Function Method
FDM computes a project-specific g-function matching EED accuracy. Run once per field. Takes ~90–150 s.
Auto-Size Borehole Field

Automatically find the optimal borefield depth, count, and BHE type to meet fluid temperature limits over the simulation horizon.

LCC (VDI 2067)
Country / Region
Analysis period yr
Discount rate %
CAPEX (GSHP)
Drilling cost EUR/m
HP unit cost EUR/kW
Distribution EUR
Total CAPEX -
Subsidy
Grant rate %
Grant cap EUR
Energy Prices (Year 1)
Electricity EUR/kWh
Natural gas EUR/kWh
District heat EUR/kWh
Elec. escalation %/yr
Variable el. price
DA strategy
DA year year
DA path
Buy surcharge (Var/Base/PV) c/kWh
Buy surcharge (Stop) c/kWh
Buy multiplier x
Feed-in discount c/kWh
Gas escalation %/yr
Reference Systems
Boiler efficiency %
COa'' levy EUR/tCO2
Energy Mix Optimizer
MILP dispatch optimizer for heating, cooling, storage, cost, and carbon trade-offs.
Country
Objective
Horizonyr
Demand will use the last simulation when available.
LCA (EN 15978)
LCA period yr
Transport distance km
Phase 1 uses Austria-aligned generic embodied factors. Country selection changes the operational electricity mix. This is suitable for concept design and option ranking, not certified reporting.
Awaiting simulation
Optimize Design
Run quick field sizing, Pareto optimization, or a combined quick baseline plus Pareto refinement from one workflow.
Workflow
Source Technologies
Selected technologies are evaluated by both quick sizing and Pareto refinement with their own Rb, cost, radius, and depth limits.
Objectives
Primary ranking
Priority: Minimum LCOE -> Maximum COP -> Minimum drilling cost -> Minimum land use -> Maximum renewable fraction
Design Variables
Depth range
80-300m
Spacing range
4-12m
Max field rows
4
STES volume
2500m3
HP capacity
Panel
Algorithm
Method
Evaluations

Quick sizing applies a baseline design first; Pareto refinement then populates Optimization Results.

Run Status
Run simulation to populate results.
Hydraulics Summary
Detailed thermal results are listed in the table. Hydraulics populate after simulation and pipe sizing.
Component Type Depth COP Yield/yr Peak kW Min EFT Max EFT Status
Run simulation to populate results.
OeWAV 207
Min EFT: -
Mean T: -
Max EFT: -
Spec. power: - W/m heat / - W/m cool Delta T ground: - K
Chart Type
Contour Settings

Run a simulation first, then view soil temperature contours in the center canvas.

Ground Profile
Annual Energy Flow
Run Network Simulation (System → Network) to see load coverage results here.
Load Coverage
Load Coverage — Line
Monthly Supply Breakdown
Building Demand Profile
Optimization Results
Configure objectives and design variables in the Run -> Optimize tab, then run Pareto optimization to see the tradeoff front here.
Click a point on the Pareto chart to inspect the solution.
-
GSHP Net CAPEX
after subsidy
-
Annual LCC
GSHP annuity
-
NPV Savings
vs gas boiler
-
Simple Payback
vs gas boiler
-
COa'' Saved
vs gas (t/yr)
Annual Cost Breakdown - VDI 2067 (EUR/yr, annuity method) OeNORM M 7140 / VDI 2067
Cumulative Cost Comparison (nominal, over analysis period)
Cost Component Breakdown (annualised, EUR/yr) -
Cost Component GSHP Gas Boiler District Heat GSHP Savings vs Gas
Run LCC Analysis to see results
Methodology: VDI 2067 Blatt 1 & 6 / OeNORM M 7140 / EN 15459-1 (annuity method). Sources: AEA-Kostencheck 2024, GeoBoost D2.1 (EGEC/TU Munich 2024), Fraunhofer ISE Ariadne 2024, Bundesnetzagentur 2024, E-Control AT 2024, BAFA BEG 2025.
Run Energy Mix optimization to populate dispatch, cost, carbon, and Pareto results.
ResourceHeat %Cool %kWCAPEXOPEX/yrNPVtCO2/yr
No energy mix results yet.
-
Total GWP
tCO2e over study period
-
Specific GWP
gCO2e per kWh useful heat
-
Embodied Share
A1-A3 plus A4
-
Operation Share
B6 electricity
-
PENRT
MWh primary energy
Impact Story
Awaiting LCA
Run LCA to identify the dominant lifecycle impact.
The summary will explain whether impacts are dominated by embodied materials or electricity use, and which component group drives the footprint.
Top Hotspot
-
Annual Elec
-
Reference
-
Embodied vs Operation
Top Component Hotspots
Component LCA Breakdown Run simulation and LCA to populate
Component Group Quantity GWP Share Repl.
Run simulation and LCA to see results
Phase 1 LCA scope: source field, heat pump plant, storage, network, replacements, and operational electricity. Dataset: Austria-aligned generic factors for early-stage comparison.
Run a STES simulation (System → STES) to see results here.
Run a simulation with cooling loads enabled to see free-cooling analysis.
Scenario Comparison

Compare saved scenarios side-by-side. Save a scenario from the Run step after each simulation, then view differences in performance, cost, and carbon impact.

Saved Scenarios
No scenarios saved yet.
Run a simulation and save it as a scenario.
Branding
Project
Name—
Location—
Designer—
PDF Options
Excel Sheets
Boreholes —
Total Depth
— m
SPF —
EFT min
— °C
EFT max
— °C
Map
Layout
Charts
Contours
Profile
Energy Flow
Geology
Demand
Buildings 3D
-
+
Design Canvas Ready
Place elements to build your geothermal layout
N
Subsurface Analysis
Study Area
-
Building Footprints
-
0 buildings found . 0 excluded
Available Subsurface Space
-
Building
Excluded
Usable Space
Borehole Field 0 BHEs
Auto-Fill Available Space
Spacing m
Pattern
Max BHEs
Predefined Field Shape
Shape
Spacing m
Rows Cols
— select a shape —
Depth (m) Radius (m)
0
Boreholes
-
Avg. Spacing (m)
-
Total Length
-
BHE / ha
Borehole placement active - click map to place . Esc to stop
Fetching buildings
from OpenStreetMap...

Subsurface Cross-Section

Total Depth150 m
Boreholes7
Ground Temp8.5 C
Layer 1Sand 0-30m
Layer 2Clay 30-80m
Layer 3Granite 80m+
Drag to rotate
50 m
X: 0.0 m | Y: 0.0 m
BHE (20 units)
STES (2 units)
Network (1415 m)
Use the toolbar to switch to Layout view, or click System → Layout.
Charts are shown in the canvas area (Results → Charts tab).
Contours are shown in the canvas area.
Ground profile is shown in the canvas area.
Energy flow (Sankey) is shown in the canvas area.
Run LCC analysis to see results here.
Run LCA analysis to see results here.
STES results shown after simulation.
Free cooling results appear here after simulation.
Load coverage results shown after simulation.
Pareto front shown after optimization.
Report
Table of Contents
9 of 9 sections
Report not yet generated
Run a simulation, then click Refresh to render the live report preview.
Scenario Comparison Compare:
No scenarios to compare
Run simulations and save them as scenarios in the Project Manager, then return here to compare results side by side.
Console
Console
Import CSV Load Profile
CSV Format
Monthly (12 rows)
Hourly (8760 rows)
Monthly format - one row per month, columns:
month, heating_W, cooling_W
or:
month, heating_kW, cooling_kW (auto-detected)

Example:
month,heating_W,cooling_W
1,42000,0
2,38000,0
...
12,35000,0

Header row is optional. Values can be W or kW - detected automatically.
Column order: month (or index), heating, cooling.
CSV
Drop CSV file here or click to browse
.csv or .txt . UTF-8 . comma, semicolon or tab separated
Preview -
JanFebMarAprMayJun JulAugSepOctNovDec
-
Peak Heating
-
Peak Cooling
-
Annual Heating
-
Annual Cooling
Project Manager
Save Current Project
Saved Projects
New Design
Choose what to clear from the canvas
Clear Everything - New Blank Canvas
Removes boreholes, pipes, STES, buildings and plume effects
Or clear specific layers
Clear Boreholes
Remove borehole markers only
Clear Network Pipes
Remove all pipe segments and connections
Clear Storage Units
Remove STES and heat pump components
Clear Buildings
Remove the building footprint overlays (Block A, Office B...)
Start New Project?

This will clear everything - map layers, boreholes, buildings, loads and all simulation results.

Save your current work first if you want to keep it.

Auto-Size Borehole Field
Min Depth (m)
Max Depth (m)
Spacing (m)
Available Area (m^2)
Simulation Horizon (yr)
Load Source
Vertical BHE Types
Single U-pipe
Double U-pipe
Coaxial
Inclined Single U
Inclined Double U
Energy Pile
Deep Coaxial (>500 m)
Shallow Slinky
Deep Spiral
Oval Borehole
Separatus
Water-Filled
Horizontal GHE Alternative (no deep drilling required)
Slinky-Coil
Linear-Loop Trench
Trench Depth (m)
Coil Diam. (m)
Coil Pitch (m)
Available Area (m^2)
GSS Assistant
Context-aware geothermal AI
Context: BHE LCC LCA STES Network