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Energos Question - Object Boundary Type


sww1235

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Hello:

 

I have a building with several insulated interior walls and so wanted to create a new "Object Boundary Type" as shown under Edit Wall Style -> Insertion Options -> Energos.

 

I have created a new type, but I cannot figure out what the parameters R S External and R S Internal are used for. Even the units are confusing, sq ft F h/Btu.

 

What are these parameters used for? 

 

Thanks in advance.

 

Edit: After a bit more googling, these units appear to be inverse heat transfer coefficient, but what I cannot figure out is why this additional value adding to lambda and R/U values.

 

What values should I use for interior walls? Interior meaning two conditioned spaces on either side of an insulated boundary. The wall style has a lambda value determined by components.

 

Edited by sww1235
fixing title due to autocorrect
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