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Effect of No Mass Materials

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

IanVG's avatar

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

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?

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

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).

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

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Last updated: Aug 02 '23