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Dear all, I updated the mid-rise apartment prototype model from DOE website from version 8.0 to version 9.1. After that, when I run the model, I got severe errors like:

   ** Severe  ** checkSubSurfAzTiltNorm: Outward facing angle of subsurface differs more than 90.0 degrees from base surface.
   **   ~~~   ** Subsurface="TWINDOW14" Tilt = 90.0  Azimuth = 270.0
   **   ~~~   ** Base surface="T EWALL C" Tilt = 90.0  Azimuth = 90.0

Please let me know if you have any suggestions. Thank you

Baseline Return Air Path Dear all, I need your opinion regarding how to decide the return air path for the baseline mod

Baseline Return Air Path Dear all, I need your opinion regarding how to decide the return air path for the baseline mod

IES model thermal block question Dear all, I need your professional opinion for the question I have. Attached picture is

IES model thermal block question Dear all, I need your professional opinion for the question I have. Attached picture is

Relative Humidity for the Baseline Model

Relative Humidity for the Baseline Model

For the 5 floors office building

Per ASHRAE 90.1-2016 and ASHRAE 90.1-2019, only space by space method mentioned that can be used for the baseline model.

Per ASHRAE 90.1-2016 and ASHRAE 90.1-2019, only space by space method mentioned that can be used for the baseline model.

Per ASHRAE 90.1-2016 and ASHRAE 90.1-2019, only space by space method mentioned that can be used for the baseline model.

Thank you Pajordan

Hello everyone, I have a question regarding regulated energy and unregulated energy. Per ASHRAE 90.1-2016, the baseline model for each code year is calculated based on baseline regulated energy cost, baseline unregulated energy cost, baseline performance cost and building performance factor. My question is does the baseline unregulated energy cost should be the same as the proposed building performance cost? Is that the reason why the building performance factor only multiplying with the regulated energy cost but not with the unregulated energy cost

regulated energy & unregulated energy Hello everyone, I have a question regarding regulated energy and unregulated e

Dear all, I have a question regarding LPD space-by-space method v.s LPD building area method. I would like to know if I use the space-by-space method for the baseline model, do I have to use the space-by-space method for the proposed model or it doesn't matter. This means I can use the space-by-space method for the baseline model but use the building area method for the proposed model. Thank you!

I found the certain answer from LEED 4.1 as well. "Baseline: All building spaces area modeled using the Space-by-Space

I found the certain answer from LEED 4.1 as well. "Baseline: All building spaces area modeled using the Space-by-Space

I found the certain answer from LEED 4.1 as well. "All building spaces area modeled using the Space-by-Space Method. (P

It has been moved

Thank you for mentioning this reference "https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-26917.pd

Thank you for mentioning this reference "https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-26917.pd

Follow the previous comment. I think your comment is correct if only under this condition: If the space types are known

Thank you for pointing this reference "https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-26917.pdf"

Per ASHRAE 90.1-2016 and ASHRAE 90.1-2019, only space by space method mentioned that can be used for the baseline model.

Per ASHRAE 90.1-2016 and ASHRAE 90.1-2019, only space by space method mentioned that can be used for the baseline model.

Yeah, I found this sentence as well, but G1.2.1 only talking about proposed model. If you go 2016 G3.1 No.6, it mention

What about ASHRAE90.1-2019. Per Table G3.1 No.6, it seems only Space-by-Space method can be used for the baseline model

From my understanding, simulation time step means how frequent the system does the calculation in one hour (one hour her

LPD Space-by-Space Method v.s. Building Area Method Dear all, I have a question regarding LPD space-by-space method v.s

Besides the comment above, I think it depends on if all these fans have the same schedule as well. But if you need to c

Besides the comment above, I think it depends on if all these fans have same schedule as well. But if you need to calib