CONTAM 3.4.0.4 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Education Tools, more precisely Science Tools.
The following versions: 3.2, 3.1 and 3.0 are the most frequently downloaded ones by the program users. This PC program works fine with 32-bit versions of Windows XP/Vista/7/8/10/11.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most frequent installer filenames for the program include: contamw2.exe, contamw3.exe, rcontam.exe and _8B1B01E36A6BAB988E167F.exe etc. The actual developer of the free software is NIST.
From the developer:
CONTAM is multizone airflow and contaminant transport analysis program. It can help you determine the airflows such as infiltration, exfiltration, and room-to-room airflows in building systems driven by mechanical means, wind pressures acting on the exterior of the building, and buoyancy effects induced by the indoor and outdoor air temperature difference.
You may want to check out more software, such as ContamRV, SimreadW or CFD0 Editor, which might be related to CONTAM.