Example: Computing HVAC Loads

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Be sure to watch a portion of this Module 9 Kickoff session recording for important updates to the workflow for generating an HVAC Loads Report, which will help you determine your Heating and Cooling requirements.  The new workflow is demonstrated from 32:40 to 51:40 in the recording. 

Module Kickoff Session

Step 1: Create an Energy Analytical Model for Your Detailed Building Model

Step 2:   Use the System Analysis Tools to Generate an HVAC Loads Report

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You can use the peak heating and cooling load values shown in the HVAC Loads Report to compute approximate values for the required supply airflow to help you determine the number of air terminals needed in each space.

Be sure to watch the Module 9 Kickoff Session recording from 32:40 to 51:40 for a demonstration of how to do this.

Step 3 - Optional:  Use the System Analysis Tools to Generate an Annual Building Energy Analysis Report

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You can also use the System Analysis Tools to create an Annual Building Energy Analysis Report that will compute the required supply airflow values, but many users report that this report can take a very long time to run.  In some cases, users report that it can take up to 12 hours or more to compute the results for their building models.

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As a quick alternative, you can use the approach demonstrated in the Module Kickoff Session, which uses the peak heating and cooling load values computed in Step 2 - the HVAC Loads Report to compute approximate values to guide your next steps. You can use these approximate values for the required supply airflow to help you determine the number of air terminals needed in each space.

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