WUFI

Was there a resolution to this? I have gotten similar results using XPS on wood framed wall assemblies in Detroit. The issue goes away when I remove the ASHRAE 160 1% driving rain at the inner-most elements of the XPS.

First you would need to specify what typical pressure difference to assume from outside to inside for your building enclosure. Next thing is to reduce your q50 to that pressure. Be reminded that this is typical not a linear relationship, but as you probably don't have an flow exponent, you might as...

I figured out the problem, but want to post here for others having the same issue.

I do not have the problem described above when I use the "File">"Open WFUI Results File" command from within WUFI Graph (instead of clicking on the WUFI Graph icon from within WUFI Pro).

From WUFI Pro 6.5, whenever I select the WUFI Graph icon, it opens Graph and shows it as "F_18.tmp" (or something similar) in the result files window in the top left of the Graph program. I have already saved the WUFI Pro file. If I save the WUFI Graph file, close it and reopen it, it does...

I want to model concrete-filled CMU. I don't see CMU or concrete in the North American database. I have used "concrete screed, mid layer" for the concrete in the core, and "masonry cement mortar - type S" for the mortar joints, but how do I model the CMU face? Thank you for your ...

Can anyone explain what the purpose of the indoor temperature shift is? I had assumed it was the +/- tolerance on the heating/cooling system controls. But from playing around with it, it does not appear to be what I think it is. Can Cristian or someone from IBP please answer the questions in this th...

I am seeing the same problem. If the HVAC is set to 70F +/-2, I think I should input "set point for heating = 68F" and "floating indoor temperature shift = 4F." Is that correct? Neither the Manual or the WUFI Forum explains "floating indoor temperature shift".

Manfred, Can you please explain what SPC 160 is? ASHRAE 160 does not have such values, so I assume you are not referring to that. The WUFI VTT 2.1 interface has "pure gypsum or lime render" under "Other materials." That seems to be the closest match to a PAPERLESS gypsum product ...

I really hope you can get the funding for this soon. Seems like the most application use of WUFI-Corr for residential and light-commercial in cold climates.
good luck!

I've begun using WUFI-Corr, but I'm not sure what I should be comparing the results to. Are there any standards that can be used to determine if WUFI-Corr results are acceptable?
For example, is 50 microns/year of corrosion too much?

If I wanted to use WUFI-Corr to estimate corrosion potential of fasteners in wood construction (eg. plywood nailing), what "binder type" should I use? The results seem to be heavily dependent on this variable, so I understand that the results for wood would be different, but is there a bin...

It worked! You are my hero!! Thanks

I've had WUFI Pro 5.3 for a few years now. I recently installed WUFI 2D, and now I am not able to open WUFI Pro. Could it be that some of the paths got moved with the WUFI 2D install? I used the recommended install locations for both programs (C:/Program files (x86)/WUFI). In WUFI 2D, I changed the ...

So, how do I determine the ECM90? I want to model concrete-filled CMU. I don't see CMU or concrete in the North American database. I am using "concrete screed, mid layer" for the concrete in the core, and "masonry cement mortar - type S" for the mortar joints, but how do I model ...

Thank you for the link, Christian. Can you please explain why the moisture source is placed only at the interior face of the sheathing? Why isn't it also placed in all layers interior of the assumed condensing surface (for example, the fiberglass batt)? Wouldn't the fiberglass also receive the "...