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NIST Multizone Modeling

The home of CONTAM and other NIST-developed IAQ and Ventilation modeling tools and information.


Contam Concept

This website was developed by the Indoor Air Quality and Ventilation Group to foster the development and facilitate the application of multizone ventilation and indoor environmental modeling in the areas of building design, operation, maintenance, investigation and research. Within this website you download the multizone airflow and contaminant transport modeling software, CONTAM and other modeling tools, information on the applications of the tools, and associated case studies.

Software Updates

  • March 8, 2023

    • Added CONTAM parametric analysis utilities (ContamFactorial and EnergyPlus-CONTAM co-simulation utility) 

    • Added link to NIST Quick Indoor CO2 Tool

  • January 5, 2023 - Updated CONTAM to version

  • December 6, 2021 - Updated CONTAM to version (fix duct-related issue)

  • November 22, 2021: Released ViPER version 1.0

  • November 8, 2021 - Updated CONTAM to version including ContamX version

  • October 15, 2021

    • Updated to CONTAM3DExport tool v3.4.0.1

    • Updated EPWtoWTH file converter v2.0

  • May 17, 2021 - Introduction to CONTAM Training videos released to NIST Video Gallery. See Tutorials page of CONTAM Software section

  • August 11, 2020 - CONTAM 3.4 and related software released