Introducing ASHRAE Standard 62.1 Calculators

ASHRAE Standard 62.1 Calculators

I am pleased to introduce the ASHRAE Standard 62.1 Calculators, a suite of tools designed to streamline the calculation of ventilation rates for both single-zone and multiple-zone systems. These tools are invaluable for ensuring compliance with the Ventilation Rate Procedure (VRP) and Indoor Air Quality Procedure (IAQP) as outlined in ASHRAE Standard 62.1.

Ventilation Rate Procedure (VRP)

Two spreadsheets are provided for calculating ventilation rates under the VRP. One is based on the multiple-spaces equation in Appendix A (2010, 2016, 2019, and 2022 editions) and the other is based on the Standard 62.1 Simplified Procedure (2022 edition only). Both are designed for use with multiple-zone recirculating systems, and the VRP Simplified Procedure calculator can also easily be applied to single-zone and 100% outdoor air systems.

Indoor Air Quality Procedure (IAQP)

This spreadsheet is designed to calculate ventilation rates for both single-zone and multiple-zone systems as specified under the Indoor Air Quality Procedure of ASHRAE Standard 62.1-2022. It includes data for 14 design compounds and PM2.5, incorporates built-in emission rates for 12 different space types, and facilitates the calculation of System Ventilation Efficiency (Ev). The calculator also features a summary compliance sheet to simplify verification processes.

An accompanying User’s Manual steps the reader through the contents of each worksheet and provides formulas and terms for calculations.
We believe these calculators will significantly enhance your ability to design and verify ventilation systems that meet ASHRAE standards, ensuring optimal indoor air quality.
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