## Comparison of parameters in WUFI Mould Index VTT and VTT-model

anderue
WUFI User
Posts: 1
Joined: Sun May 10, 2020 8:59 pm -1100

### Comparison of parameters in WUFI Mould Index VTT and VTT-model

Hi.

How does the parameters for "Type of surface" and "Type of wood" compare to the parameters W and SQ in the VTT-model?
In the VTT-model, the parameter W is set to 0 for pine and 1 for spruce. Is this the same parameter as "Type of wood" in the VTT-program? In the VTT-program one can choose between Softwood (value = 0) and hardwood (value = 1). This would mean that softwood = pine and hardwood = spruce?

The same goes for type of surface. I assume that this value equals to the SQ-value in the VTT-model. This would mean that planed surface = sawn surface (SQ = 0) and rough surface = kiln dried surface (SQ=1).

So, I assume that the parameters in the VTT-program and in the VTT-model are the same, but I may be wrong. Does anybody know if I am correct?

saricioglu pelin
WUFI User
Posts: 13
Joined: Fri Jun 03, 2022 12:07 am -1100

### Re: Comparison of parameters in WUFI Mould Index VTT and VTT-model

Did you learn the answer ? i wonder that..
Thank you

Daniel
WUFI SupportTeam IBP
Posts: 128
Joined: Tue Jul 19, 2005 2:50 am -1100
Location: Fraunhofer IBP, Holzkirchen
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### Re: Comparison of parameters in WUFI Mould Index VTT and VTT-model

Hi all,

in WUFI SW is type of surface and W is type of wood. The two values are only of intersest in case of a wooden material. In all other cases the values are zero!

Hard wood is zero, also Pine. Only pine sapwood (and also spruce sapwood, if present) would be 1.
Your description concerning surface quality is correct. Please also look at the online help for these points. Viitanen / Ojanen decided to use the terms Type of wood and Type of surface in the WUFI VTT software.

Daniel
Dr.-Ing. Daniel Zirkelbach, Deputy Head of Department Hygrothermics, IBP Holzkirchen