ASHRAE 90.1 and LEED
Modelling Guidance
ASHRAE 90.1 and LEED User Guide: This comprehensive guide explains how to carry out ASHRAE 90.1 Appendix G Performance Rating Method (PRM) modelling using DesignBuilder. It shows how to develop proposed building models and convert them into baseline models with automated wizards, and how to configure detailed HVAC systems. The guide includes workflows for LEED credits EAp2 and EAc1. It also features appendices on coil efficiency, fan pressure rise calculations, PIU fan sizing, and QA checklists for LEED submissions.
LEED MEPC User Guide: The document explains how to use the Minimum Energy Performance Calculator (MEPC) reporting feature in DesignBuilder for LEED compliance. It provides step-by-step instructions for generating auto-filled LEED MEPC spreadsheets from ASHRAE 90.1 simulations, outlines precautions, and provides model preparation requirements. The guide also includes appendices on calculating conditioned areas, glazing U-factor, SHGC, VLT, and DX coil efficiency.
Modelling Guide for Unmet Load Hours: This document provides detailed guidance on understanding, diagnosing, and reducing unmet load hours in building energy simulations. It explains what unmet load hours are, how they are calculated and monitored, and why they matter for compliance with standards like ASHRAE 90.1 and LEED. The guide includes troubleshooting strategies for common issues, including incorrect HVAC sizing, airflow rates, schedules, and setpoint management. It also covers best practices for using temperature distribution plots, tolerance settings, and advanced tools like optimisation and sensitivity analysis to address them.
DesignBuilder also generates formatted reports for LEED Daylight Credits and has native integration with OneClick LCA for LEED credits under the Materials and Resources category.
Click here for the list of all LEED analysis options in DesignBuilder.
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