ASHRAE-55 "Go | No-Go" With HB Recipes?

Hello everyone,
Fairly new to ASHRAE 55. Energy/Passive House are the usual jams. I’ve a couple questions, seeking clarification/conformation about the outputs from “HB PMV Comfort Map”, as I feel I may be adding redundancies already included in the recipe, and also like to learn.

Currently I’ve set up for ASHRAE 55-2020: Vertical Air Temp Difference:
PMV Map Output Temperature (SET==True):
sensor grids at ankle and head height to compare delta T does not exceed limits. Floor Surface Temperature:
HB Model-> OSM Output face_indoor_temp (Floor srfc):
For floor surface temp. Ankle Air Speed:
HB Model-> OSM Output face_indoor_temp (glazing surface), and Room Comfort Results air_temp_ feeding Ladybug_Window Downdraft: for each sensor val if v>x rigged up.

In reference to CBE Thermal Comf Tool and Initial Documentation of Thermal Maps

A: I feel like perhaps I may be ‘manually doing’ some things that are already included in the PMV Comfort Map recipe?
For instance in refrence toe CBE:
All of these outputs are included in the the HB PMV Comfort Map outs_… so I feel like there is a decent possibility I’m adding additional things that are already being taken into account in the recipe.

B: Radiant Temperature Asymmetry Also feeling like this is included already in the recipe and one would not need to compare face_indoor_temp outputs with table 5-11?

Thanks anyone for their time and knowledge.

1 Like

Hi @TrevorFedyna did you get the answer you’re looking for, I too have the same questions.

Thank you!

Hey @TrevorFedyna ,

Sorry for not responding to this over a year ago. I imagine that you already know the answer now but, for the sake of everyone else seeing this message, the thermal comfort mapping recipes only look at whole-body thermal sensation. So the hot/ neutral / cold values that you get out of the recipe are for the whole body and the “thermal comfort percent” refers to the percentage of occupied hours where the whole body thermal sensation is neutral.

The local discomfort parameters like radiant asymmetry require a different type of analysis. All of these local discomfort metrics could be computed with legacy ladybug (with the help of honeybee to run the energy simulation). Most of them can be computed using the LBT plugin with the help of the LBT Python SDK but I’m still working on exposing all of these capabilities as components with the LBT Ladybug plugin. If you’re not a LBT SDK user, I might just direct you use the legacy plugin and the comfort samples here on hydra until I can finish adding them: