Not calculating right about thermal_comfort HOT 9 OPEN

I recognaice exactly the same issue :/

from thermal_comfort.

Same issue too.

from thermal_comfort.

Currently ssi is not really calculated if bellow 70°F since it's meant for higher temperatures.

Not my code but it's a good idea to discuss how to handle such situations in this issue.

from thermal_comfort.

Hi,
I'm bit lost why? 70F is standard room temperature and when I try to calculate it using some of ssi calculators (f.e. https://www.vcalc.com/wiki/rklarsen/Summer+Simmer+Index), it shows me the right value.
There should be no temp limitation.
Or am I mistaking?
M.

from thermal_comfort.

@lymanepp do you remember why you added the temp limit?

from thermal_comfort.

@lymanepp do you remember why you added the temp limit?

The limit should be 58° F degrees instead of 70° F. That was an error in my implementation. I'll submit a PR to fix it.

from thermal_comfort.

Please, can you explain why the limit at all? The calculation of SSI has no limit and can count with lower values. Thanks

from thermal_comfort.

Please, can you explain why the limit at all? The calculation of SSI has no limit and can count with lower values. Thanks

SSI is a form of heat index and was not designed for lower temperatures. The SSI author only presents results for temperatures above 70° F. But my implementation from around 15 years ago used 58° F as the cutoff value. I think I changed it to 70° F when implementing in HA to align with the author's descriptions of temperature ranges (slightly cool, etc).

@dolezsa I'll leave it to you to decide what (if any) lower bound to use here.

from thermal_comfort.

I changed my local copy to use 58° F as the cutoff value and it looks much better as the SSI and air temperature converge together at that temperature. No more big jump at 70° F.

from thermal_comfort.