# Adaptive Comfort Parameters

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![](https://894783789-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LPHXQ1I3gb93zpLrLZf%2Fuploads%2Fgit-blob-466d03d10d4f937e1933f427c4e1e054eac81bdd%2FAdaptive_Comfort_Parameters.png?alt=media) - [\[source code\]](https://github.com/ladybug-tools/ladybug-grasshopper/blob/master/ladybug_grasshopper/src/LB%20Adaptive%20Comfort%20Parameters.py)

Create a set of parameters that define the acceptable conditions of the Adaptive thermal comfort model.

These parameters can be plugged into any of the components that compute Adaptive thermal comfort.

### Inputs

* **ashrae\_or\_en**

A boolean to note whether to use the ASHRAE-55 neutral temperature function (True) or the european neutral function (False), which is consistent with EN-16798 (and the older EN-15251). Preference is given to EN-16798 in places where EN-16798 and EN-15251 differ (eg. the 1C lower cold threshold in EN-16798). Note that this input will also determine default values for many of the other properties of this object.

* **neutral\_offset**

The number of degrees Celcius from the neutral temperature where the input operative temperature is considered acceptable. The default is 2.5C when the neutral temperature function is ASHRAE-55 (consistent with 90% PPD) and 3C when the neutral temperature function is EN-16798 (consistent with comfort class II). Note that, when the neutral temperature function is EN-16798, one degree Celsius is automatically added to the offset value input here to get the lower temperature threshold. This accounts for the fact that EN-16798 does not interpret the neutral offset symmetically. For ASHRAE-55, the following neutral offsets apply.

```
* 90 PPD - 2.5C

* 80 PPD - 3.5C
```

For the EN standard, the following neutral offsets apply.

```
* Class I - 2C

* Class II - 3C

* Class III - 4C
```

* **avgm\_or\_runmean**

A boolean to note whether the prevailing outdoor temperature is computed from the average monthly temperature (True) or a weighted running mean of the last week (False). The default is True when the neutral temperature function is ASHRAE-55 and False when the neutral temperature function is EN.

* **discr\_or\_cont\_vel**

A boolean to note whether discrete categories should be used to assess the effect of elevated air speed (True) or whether a continuous function should be used (False). Note that continuous air speeds were only used in the older EN-15251 standard and are not a part of the more recent EN-16798 standard. When unassigned, this will be True for discrete air speeds.

* **cold\_prevail\_limit**

A number indicating the prevailing outdoor temperature below which acceptable indoor operative temperatures flat line. The default is 10C, which is consistent with both ASHRAE-55 and EN-16798. However, 15C was used for the older EN-15251 standard. This number cannot be greater than 22C and cannot be less than 10C.

* **conditioning**

A number between 0 and 1 that represents how "conditioned" vs. "free-running" the building is. 0 = free-running (completely passive with no air conditioning) 1 = conditioned (no operable windows and fully air conditioned) The default is 0 since both the ASHRAE-55 and the EN standards prohibit the use of adaptive comfort methods when a heating/cooling system is active. When set to a non-zero number, a neutral temperature function for heated/cooled operation derived from the SCATs database will be used. For more information on how adaptive comfort methods can be applied to conditioned buildings, see the neutral\_temperature\_conditioned function in the ladybug\_comfort documentation.

### Outputs

* **adapt\_par**

An Adaptive comfort parameter object that can be plugged into any of the components that compute Adaptive thermal comfort.