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CONTAM

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This group is for users of the CONTAM-related suite of software and is maintained by the National Institute of Standards and Technology (NIST).

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Andy Xu, Liangzhu (Leon) Wang5

Jan 3

Missing wind angles in LB2 file

Thanks Leon! Please see the cfd0 file attached. The current simulation parameters were set to try and

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Missing wind angles in LB2 file

Thanks Leon! Please see the cfd0 file attached. The current simulation parameters were set to try and

Jan 3

mahmoud mohamed, … Dols, William Stuart (Fed)4

Jan 2

Pessurization systems with contam

Please refer to the ASHRAE Handbook of Smoke Control Engineering for a comprehensive guide on the use

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Pessurization systems with contam

Please refer to the ASHRAE Handbook of Smoke Control Engineering for a comprehensive guide on the use

Jan 2

SB86, William Dols2

12/30/25

Changes to .prj file not applied when running CONTAM via contamxpy

SB, Without knowing exactly what it is you're changing in the PRJ file, I would have to guess

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Changes to .prj file not applied when running CONTAM via contamxpy

SB, Without knowing exactly what it is you're changing in the PRJ file, I would have to guess

12/30/25

Hesham Elkhatib, William Dols2

12/17/25

contaminants unit

Please see this previous post: https://groups.google.com/a/list.nist.gov/g/contam/c/83BYhMsvlc4/m/

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contaminants unit

Please see this previous post: https://groups.google.com/a/list.nist.gov/g/contam/c/83BYhMsvlc4/m/

12/17/25

Danielle Mizuno

12/16/25

Maximum limit for contaminants?

Dear CONTAM team, I am currently working on a high-rise MURB. In order to obtain cross-contamination

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Maximum limit for contaminants?

Dear CONTAM team, I am currently working on a high-rise MURB. In order to obtain cross-contamination

12/16/25

Alfredo Jara Munar, Dols, William Stuart (Fed)4

11/24/25

Sea level effect in pressurization systems

Alfredo, I'm not sure if you've resolved your issue, but when I run your model HIGH (3859 m)

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Sea level effect in pressurization systems

Alfredo, I'm not sure if you've resolved your issue, but when I run your model HIGH (3859 m)

11/24/25

SB86, William Dols3

11/15/25

contamxpy callback off

Hi Stuart, Thank you so much for the clarification. I really appreciate your quick and clear response

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contamxpy callback off

Hi Stuart, Thank you so much for the clarification. I really appreciate your quick and clear response

11/15/25

Anaïs EMERY, William Dols2

11/14/25

Modeling Non-Homogeneous Leakage in Ducts Using CONTAM

Anaïs, You can use multiple approaches, depending on your analysis requirements and the available

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Modeling Non-Homogeneous Leakage in Ducts Using CONTAM

Anaïs, You can use multiple approaches, depending on your analysis requirements and the available

11/14/25

Giannis Papadopoulos, Dols, William Stuart (Fed)2

11/13/25

Smoking Tobacco

You can refer to the following publications that involve CONTAM studies that include tobacco smoke as

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Smoking Tobacco

You can refer to the following publications that involve CONTAM studies that include tobacco smoke as

11/13/25

Muthukumar Maragathamayil, Dols, William Stuart (Fed)4

11/13/25

Error while trying to open idf file created by CONTAM3DExport using idf editor

Muthukumar, Apologies for not responding sooner, but I was on furlough. As you have figured out, the

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Error while trying to open idf file created by CONTAM3DExport using idf editor

Muthukumar, Apologies for not responding sooner, but I was on furlough. As you have figured out, the

11/13/25

Steve Willis, … Anders Bjork12

10/9/25

Stuart, It looks like I needed to change my Absolute Convergence Factor (in Simulation Parameters>

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Stuart, It looks like I needed to change my Absolute Convergence Factor (in Simulation Parameters>

10/9/25

김수, William Dols2

9/29/25

Draft Post for Google Contam Group

Suhan, If your goal is to model the entry of contaminants from the surrounding soil, for example, to

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Draft Post for Google Contam Group

Suhan, If your goal is to model the entry of contaminants from the surrounding soil, for example, to

9/29/25

Caleb Taylor, William Dols2

9/25/25

Question about Modeling Gas Dispersion

Caleb, CONTAM is generally a "well-mixed" model, so zones are represented as having a

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Question about Modeling Gas Dispersion

Caleb, CONTAM is generally a "well-mixed" model, so zones are represented as having a

9/25/25

김수, William Dols2

9/25/25

How to Model a Portable Air Purifier?

Hello Suhan, Please refer to the FaTIMA tool that Lisa referenced in her note. https://www.nist.gov/

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How to Model a Portable Air Purifier?

Hello Suhan, Please refer to the FaTIMA tool that Lisa referenced in her note. https://www.nist.gov/

9/25/25

Buddila Wijeyesekera, Dols, William Stuart (Fed)4

9/2/25

Re: Issue when converting an EPW file to WTH file

Buddila, The problem is in the field that provides the minutes for the date/time of each record. The

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Re: Issue when converting an EPW file to WTH file

Buddila, The problem is in the field that provides the minutes for the date/time of each record. The

9/2/25

Amr Auf, Dols, William Stuart (Fed)2

8/29/25

Modelling Heat Recovery in EnergyPlus and Contam

Amr, EnergyPlus can employ multiple types of HRV/ERVs in various locations of the model, eg, at the

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Modelling Heat Recovery in EnergyPlus and Contam

Amr, EnergyPlus can employ multiple types of HRV/ERVs in various locations of the model, eg, at the

8/29/25

Andy Xu, Liangzhu (Leon) Wang2

8/20/25

CFD0 - Wind speed increasing for unknown reason

Hi Andy, I have answered your last question. I think you can talk to my postdoc regarding modeling

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CFD0 - Wind speed increasing for unknown reason

Hi Andy, I have answered your last question. I think you can talk to my postdoc regarding modeling

8/20/25

Buddila Wijeyesekera, Dols, William Stuart (Fed)3

8/15/25

Re: Inputting weather data to a CONTAM model

Hi Stuart. Thank you so much for sharing the resources and the advise. Yes its transient air flow

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Re: Inputting weather data to a CONTAM model

Hi Stuart. Thank you so much for sharing the resources and the advise. Yes its transient air flow

8/15/25

7/30/25

CFD0 input velocity and convention

Hello, In CFD0, I'm wondering what's the difference between the input velocity within the WPP

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CFD0 input velocity and convention

Hello, In CFD0, I'm wondering what's the difference between the input velocity within the WPP

7/30/25

quang nguyen, … Dols, William Stuart (Fed)9

7/2/25

Sample file in instruction guides CONTAM

Yes. Can be verified by modifying the inputs so the multipliers and control values are all set to 1

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Sample file in instruction guides CONTAM

Yes. Can be verified by modifying the inputs so the multipliers and control values are all set to 1

7/2/25

Nicole Alejandra Zambrana Balanza, Anders Bjork2

7/1/25

Assistance with CONTAM Inputs for Infiltration Rate Calculation

Hello Nicole, Are you still needing help with this? I have a couple of ideas. What will the "

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Assistance with CONTAM Inputs for Infiltration Rate Calculation

Hello Nicole, Are you still needing help with this? I have a couple of ideas. What will the "

7/1/25

Andy Xu, Liangzhu (Leon) Wang2

6/11/25

Generating empty LB2 file

Hi Andy, you need to run WPCTranslator in the same folder with all the *var files: the same output

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Generating empty LB2 file

Hi Andy, you need to run WPCTranslator in the same folder with all the *var files: the same output

6/11/25

5/26/25

In CFD0, how are outlets configured and used?

I'm getting incorrect colours in my flood plots and I suspect it could be because I have no

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In CFD0, how are outlets configured and used?

I'm getting incorrect colours in my flood plots and I suspect it could be because I have no

5/26/25

Andy Xu, Liangzhu (Leon) Wang5

5/13/25

How to generate a restart file in CFD0

Please see attached cfd0 file. Thanks.

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How to generate a restart file in CFD0

Please see attached cfd0 file. Thanks.

5/13/25

Ankit kherade, Dols, William Stuart (Fed)3

5/6/25

Possibility of Modelling heat pump in Contam software.

CONTAM does not perform heat transfer calculations. In CONTAM, mechanical systems are a means to

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Possibility of Modelling heat pump in Contam software.

CONTAM does not perform heat transfer calculations. In CONTAM, mechanical systems are a means to

5/6/25

Anders Bjork, Dols, William Stuart (Fed)9

5/6/25

Matching Results to ASHRAE Smoke Control Ex 19.7 | Tenability in CONTAM

Stuart, Thank you so much for your help with this. I found the attached examples very helpful. I now

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Matching Results to ASHRAE Smoke Control Ex 19.7 | Tenability in CONTAM

Stuart, Thank you so much for your help with this. I found the attached examples very helpful. I now

5/6/25

Xingji Yu, … William Dols20

4/24/25

Question regarding co-simulation

This issue appears to have nothing to do with co-simulation. One must first understand the basics of

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Question regarding co-simulation

This issue appears to have nothing to do with co-simulation. One must first understand the basics of

4/24/25

Liangzhu (Leon) Wang, Andy Xu2

3/18/25

Re: [contam] WPC Translator Error - "Couldn't find the ewc file specified in pld file"

Hi Leon. Just for clarification, are you recommending the x-region of 70m needs to be doubled to 140m

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Re: [contam] WPC Translator Error - "Couldn't find the ewc file specified in pld file"

Hi Leon. Just for clarification, are you recommending the x-region of 70m needs to be doubled to 140m

3/18/25

Rodrigo Mora, Dols, William Stuart (Fed)2

3/17/25

CONTAM-TRNSYS coupling: radon simulation HRV and passive stack zero airflows in TRNSYS

Rodrigo, It seems the coupling is working fine. This is easily verified by replacing the signal from

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CONTAM-TRNSYS coupling: radon simulation HRV and passive stack zero airflows in TRNSYS

Rodrigo, It seems the coupling is working fine. This is easily verified by replacing the signal from

3/17/25

Andy Xu, Liangzhu (Leon) Wang3

3/11/25

CONTAM-CFD0 WPC Translator Error - "Path 'X' Is Not On A Building Surface"

Resolved. Thank you! On Monday, March 10, 2025 at 12:06:37 PM UTC-4 Liangzhu (Leon) Wang wrote: Hi

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CONTAM-CFD0 WPC Translator Error - "Path 'X' Is Not On A Building Surface"

Resolved. Thank you! On Monday, March 10, 2025 at 12:06:37 PM UTC-4 Liangzhu (Leon) Wang wrote: Hi

3/11/25

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