DesignBuilder 2025.1 is the latest version of the software for building energy simulation, HVAC design, and compliance analysis, running on the EnergyPlus v23.1 simulation engine .
Key New Features
New File Format & Interoperability
- Open XML File Format: Enables compatibility across DesignBuilder versions and supports data exchange with other tools .
HVAC & Load Analysis
- DOAS Fresh Air Loops: New generic fan type for more accurate HVAC modeling .
- HVAC Load Reports: Beta feature using industry-standard tabular layouts .
- New Curve Types: QuadLinear and QuintLinear curves for heat pump systems .
Compliance & Standards
- ASHRAE 90.1 2019 Appendix G: Now supported .
- Improved LEED v4.1 MEPC Reporting: Updated for industry compliance .
- NECB Templates: For Canadian energy code projects .
Modeling & Visualization
- Block Conversion Tools: Any block type can be converted to any other .
- Boolean Union Operations: Apply to multiple blocks in a single operation .
- Block Rezoning Performance: Improved speed .
Insights Online Platform
- Interactive Visualizations: Bubble plots, parallel coordinates, and parametric charts for optimization and sensitivity results .
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