This Companion Tool is designed to be used in conjunction with the DOE/PNNL ASHRAE Standard 90.1 Performance Based Compliance Form (i.e., Compliance Form). The process is that submitters first fill out the Compliance Form and import the data entered into the Compliance Form into this tool to perform additional/custom calculations. AHJs/RAs can select in-built custom/additional calculations to be performed. Examples of in-built additional/custom calculations include but are not limited to determining performance in alternative metrics such as site energy, source energy or GHG emissions and determining savings by fuel and end use. Please see the "Instructions for AHJs and RAs" tab in the Companion Tool for a complete list. AHJs/RAs can add as many tabs as desired in order to perform additional calculations relevant to the AHJ/RA's program. This video demonstrates how to use the companion tool.
What's New
This version of the Companion Tool was updated to use default SEEUPFs derived from the latest PNNL App G Prototype Models (June 2025) and 2025 construction weights for 2016, 2019, and 2022.
Version: v1.5
Release Date: November 25, 2025
Download:
ASHRAE Standard 90.1 Performance Based Compliance Form Companion Tool.zip