Zone areas*inside surface emissivities are summing to zero
I have a model of a home I'm playing with, has been working fine, slowly adding others things, such as lights, and people schedules, tweaks, like roof overhangs that shade the building and windows. I can't figure out what I did or changed, but now I'm getting the following error.
* Warning * Zone areasinside surface emissivities are summing to zero, for Zone="LIVING THERMAL ZONE" * ~~~ ** As a result, MAT will be used for MRT when calculating a surface weighted MRT for this zone.
I have a basement zone that doesn't give this error, and two unconditioned attic zones, and an attached garage zone. The Living zone has about 5-6 spaces in it.
I can't find any information on this, and not sure where to start to look for issues.
Thanks in advance.
This is triggered here (line 5494). For a given zone, that warning can only pop up once (i.e. first iteration ... message could be more informative). Can't say why this didn't pop up before (as you're adding model features), but I suspect there's a (new) request to calculate zone mean radiant temperatures ... before surface temperatures have had a chance to evolve. Not really a source of worry IMHO.