DesignBuilder 2025.1: Building Performance Simulation Software

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 .