Difference with Thermal Confort integration

[Percherie]

Hello,

I use Thermal Confort integration: https://github.com/dolezsa/thermal_comfort
I need it to control PLCs and scripts based on values. Your superb interface doesn't allow me to retrieve values, so I use it for consultation.

But I can't find the same values with your card. Can you tell me the index that should correspond with Thermal Confort? There may be a different calculation method between the two solutions.

[Percherie]

Hi found my issues on Thermal Confort : dolezsa/thermal_comfort#371

[argaar]

Hi, the DI is calculated here: https://github.com/argaar/comfortable-environment-card/blob/main/src/comfortable-environment-card.ts#L127 while the Heat Index formula is here https://github.com/argaar/comfortable-environment-card/blob/main/src/comfortable-environment-card.ts#L74 in the function you can found further references to the source

As far as I can see, the thermal comfort integration seems to use a similar formula https://github.com/dolezsa/thermal_comfort/blob/master/custom_components/thermal_comfort/sensor.py#L970

I've installed Thermal Comfort, and while it seems to not return a numeric value with the description, I've found that the results are the same as my calculations

Left is DI of one of my room, on the right (thermal comfort) I've the same output (as string)

[Percherie]

Thank you for taking the time to reply

At home I have slight discrepancies between the two. I reported an anomaly to Thermal Confort when we used C° instead of F°. They corrected it months ago but it may be incomplete.

I live in the south of France near the Mediterranean and in practice the DI doesn't quite reflect what it feels like when it's 35°C with 62% humidity.
In practice, when walking quietly in town, the "Dew Point" corresponds perfectly to how it feels. It's less alarmist and the operating range is wider.
large

This is off topic, but after my holiday I'll report back... In the meantime, if you wish, can you study the use of the Dew Point?

[igorsantos07]

Sorry to... drop... from absolutely nowhere, but isn't "dew point" simply the index at which plants would show... dew? Like air water condensing on the leaves, or on a car?
This ísn't much related to what humans few.

Edit: it looks like Canadian humidex is based on dew point, similar to the USA's Heat Index which is based on RH, and dew point is then indeed somewhat related to human comfort:

https://en.wikipedia.org/wiki/Dew_point#Relationship_to_human_comfort

[Percherie]

Hi @igorsantos07 and @argaar

After a very hot and very humid summer in the south of France and 20 km from the sea, I have noticed that the ‘Dew Points’ comfort index corresponds to sedentary use, for a person who is not overweight.

The humidex index would be better suited to people working outdoors (bricklayers, etc.) or those who do more strenuous physical activity than walking.

For example, at 29° and 82% humidity, the humidex is alarming. Yet these were the conditions we experienced for 3 days.
With the Dew Point index, ‘Extremely uncomfortable, oppressive’ is what we felt. The family, aged over 70, confirmed that it was oppressive, but nowhere near the widespread discomfort indicated by the Humidex index (see screenshot).

Still at 29°, here's another simulation with the humidity reduced to 73%, Dew Point improves to 74% and Humidex to 73%.

At 62%, only the Dew Point index improves

At 51%, both indices improve at the same time

All this leads me to use the Dew Point index instead of Humidex. It's more refined and less alarmist.
Is it possible to suggest the Dew Point index? Ideally with an option to choose one of the two indices or both at the same time.

This was my feedback on how I really feel about the available indices.