Advanced multi-zone thermal modeling with state-of-the-art physics engine. Trusted by engineers worldwide for natural and hybrid ventilation systems.
Free during Beta - Regular pricing applies after beta ends
Professional tools for industrial ventilation design

Built on validated physics principles and advanced numerical methods
Bernoulli's Principle
Predicts airflow patterns through openings based on pressure-velocity relationships
Thermal Buoyancy
Temperature differences create natural upward air movement (stack effect)
MYT Pressure Factor
Dimensionless parameter (0-1) quantifying thermal load effectiveness based on vertical distribution
Neutral Plane
Critical elevation where internal and external pressures equalize
Trust-Region Algorithm
Advanced iterative solver for complex multi-zone configurations
Mass Balance Iteration
Ensures conservation of air mass with temperature-dependent density
Temperature Stratification
Calculates realistic vertical temperature profiles
Pressure Profile Integration
Determines complete vertical pressure distribution
Six simple steps to professional ventilation design
Choose Single-Zone for simple analyses or Multi-Zone for complex building systems
Configure outside temperature, air pressure, and relative humidity conditions
Enter dimensions, heat loads, and MYT values for your building zones
Set up natural ventilation openings and mechanical systems
Click "Start Calculation" - results typically converge within seconds
Analyze performance indicators, temperature profiles, and airflow patterns
Specialized solutions for medium to high heat load environments
Optimized for high heat metal processing
Thermal management for power plants
Precision cooling for glass manufacturing
Heavy-duty industrial ventilation
Safe, efficient air management
Medium to high heat load solutions
VentCoach is developed by GAL Ventilation GmbH, a company with over 60 years of experience in industrial ventilation. The calculation algorithm at the heart of VentCoach was initially developed 30 years ago as a single-zone model and has evolved over time into this modern multi-zone system, now available to the public.
Key metrics to evaluate your ventilation design
Indicates stack effect strength and airflow division between inflow and outflow zones
Critical for thermal comfort and energy efficiency assessment
Human comfort assessment at typical occupant height (1.5-2m)
Air exchange through each opening for system balancing
Vertical pressure profile showing thermal driving forces
Solution stability and reliability indicator
All features free during beta phase - Regular pricing shown for reference
Beta Status: Most features fully functional including multi-zone (up to 15 zones). Coming soon: AI Assistant, PDF reports, and project export.
| Tier | Free | Pro | Max | Ultimate (Future) |
|---|---|---|---|---|
| Price per Month / User | FREE | FREE €49 | FREE €78 | FREE €129 |
| Single-Zone Model | ||||
| Max heat load (kW) | 200 | 1000 | unlimited | unlimited |
| Max natural ventilation openings | 3 | 15 | 25 | unlimited |
| MYT based Stratification | ○ | |||
| Power Law Calculation for Openings | ○ | ○ | ||
| Mechanical supply fans with ambient conditions | ○ | |||
| Max mechanical supply fans | 0 | 2 | 6 | unlimited |
| Mechanical supply fans with custom conditions (cooling) | ○ | ○ | ||
| Mechanical exhaust fans | ○ | |||
| Max mechanical exhaust fans | 0 | 2 | 6 | unlimited |
| Multi-Zone Model | ||||
| Max. Zones | ○ | ○ | 2 | 15 |
| General Functionality | ||||
| VentCoach AI Assistant | ○ | ○ | ○ | |
| QuickSizing Tool | ||||
| Printable Reports | ○ | |||
| Extended printable reports | ○ | ○ | ||
| Saving, export and import of projects | ○ | ○ | ||
No credit card required. Start designing better ventilation systems today.