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Effect of No Mass Materials

I see that no mass materials only have the following physical properties:

R-value
Thermal absorptance
Solar absorptance
Visible absorptance
Roughness

What effect would using no mass materials have on my model? Does it prevent certain kinds of simulations from running?

asked 2023-07-31 11:45:57 -0500

updated 2023-07-31 12:28:22 -0500

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Assuming you're referring to OpenStudio/EnergyPlus, you'll find some good answers in past UMH posts (search for "massless", "nomass" or "no-mass"). Indeed, some E+ modules (e.g. KIVA, Site:GroundDomain:Slab) won't take in massless materials (edit: initial comment re-posted as an answer).

Denis Bourgeois

answered 2023-08-02 06:05:34 -0500

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