Can we change the indoor temperature in free version?

[holyspidoo]

Is it possible to change it? I seem to be locked to either using ASHRAE 160 or EN 15026 which use 21.1.

I want to test using 18 Celsius indoor...

[Manfred Kehrer]

No, I am sorry to say, you can not change this in the free version.

[holyspidoo]

What would be the cheapest option for me to change that temperature (given I need north american version since I live in Quebec)?

All I'm trying to do is find out why my brand new house had a condensation problem inside the wall, and since most people you hire to 'diagnose' these issues say whatever they want, I wanted to check the hard data...

Thank you

[Manfred Kehrer]

To get hard data for your house you need hard input data for WUFI first for exactly this time period.

Indoor conditions
Outdoor conditions.
Precise Material Properties.

This is called a forensic study and I doubt that you will be successful with the limited free version.....sorry.

If you have an air tight envelope without any vapor retarder on the interior side of the insulation in a cold climate, this may be the problem.

[holyspidoo]

Is it at least possible to change the perm value for the vapor barrier on the inside?

The material I used is 0.07 perm, but I want to see the difference when using perm 0.03 (the material I used on the first floor is 0.03)

[Manfred Kehrer]

Well you have the option to select the perm of a interior coating from the list and further more add as many membranes on the interior from the database to come up with your desires overall permeance.

[holyspidoo]

Interior Coating can only be .1 1 10 or 5, right? I can't specify 0.03 directly?

As for adding membranes, the only one I can find in the database of the ORNL version is the 0.07 perm one. If there was one that was 0.01, I guess I could add three (if perm units are additive?)

[Manfred Kehrer]

The Resistances are additive, not the perm values!