Indoor Thermal Comfort Tool — Advanced Thermal Comfort Metrics for Home Assistant
The ultimate goal of this integration is to obtain a scientifically based “Real Feel” virtual temperature sensor for indoor conditions, i.e. the temperature as a person feels it, taking into account all the parameters of thermal comfort:
ta: Air temperature
tr : Mean radiant temperature
va: Air velocity
rh: Relative humidity
clo: Clothing insulation level
met: Metabolic rate
Indoor Thermal Comfort Tool is a custom integration for Home Assistant that provides calculated thermal comfort indicators based on ASHRAE Standard 55-2023, including:
PMV (Predicted Mean Vote) helps you understand how comfortable people feel in a space based on thermal sensation (from cold to hot), allowing smarter climate control.
PPD (Predicted Percentage of Dissatisfied) estimates how many people are likely to feel uncomfortable — useful for identifying comfort problems even when average conditions seem fine.
SET (Standard Effective Temperature) reflects the perceived temperature, factoring in humidity, clothing, air speed, and more — great for adaptive comfort strategies and real-world optimization.
Using these metrics helps you optimize HVAC operation, save energy, and maximize occupant comfort with science-based insights.
I’ve aborted “feels like” temperature a long time ago. It’s pretty useless.
I’ve been using this thermal comfort integration for a while (specifically the summer simmer index) for controlling my AC. As you’ve said, it’s labelled output, so it’s not obvious how to set a temperature for this, but I essentially just have standard heating and cooling settings that gets triggered on outside and inside temperatures, with conditions to check the abovementioned index together with a variety of other factors. I’ve gone through the summer testing this and now we’re in winter and I’m still tweaking some winter conditions. Hopefully I can improve on all of this.
HI.
For initial configuration, it is good to use tabular values (Table 5-1, 5-2 of ASHRAE Standard 55 or Annex C of ISO 7730). For example, a typing person generates 1.1met. Also, for example, the following set of clothes (Underpants, boiler suit, socks, shoes) creates 0.7clo insulation.
Next, it would be nice to refine (calibrate) these parameters at a time when you feel really comfortable changing the met/clo value to PMV=0.
Hi.
The main difficulty in making full use of all integration features lies in the parameters “va” (Air velocity) and “tr” (Mean radiant temperature). That is why these parameters are accepted as optional in the integration. Yes, indeed, for an ordinary user, measuring them using special sensors is too difficult a task. Fortunately, these parameters can be calculated and virtual sensors can be created based on these calculations to dynamically account for their changes.
The only caveat here is that these calculations are based on national building codes and are highly dependent on the individual parameters of the room, so they are not universal.
Judging by the message in the image, you have already added the repository and are trying to add it again. You just need to find it in the list; look more carefully.
It is also necessary to restart HA.
You can also try refreshing your browser cache. (F5 or Ctrl+F5)
Or add it manually by copying the entire comfort_tool folder from repo to custom_components/ as follows
Is there a way to modify the elements entered when configuring a room? I cannot find how to change, for example, the reference entity for humidity.
I can’t access this panel again:
The officially released versions of integration don’t currently have such settings. You need to use entities with current values of the model’s input parameters (for example, the current relative humidity value RH).
You may have previously seen settings with reference values because you downloaded files from a fork of future releases I’m still working on. They haven’t been released yet.
I think my question has been misunderstood. I am referring to the official integration. What I want to do is modify the entities selected when configuring the creation of devices for this integration.
To do this, you need to create a new integration entry via “Add Entry” on the integration page. Currently, it’s not possible to edit these entries for an existing entry.
To get it right the first time, you need to prepare the entities you plan to use in the integration (for example, clo and met, which you likely didn’t have before installing the integration).
In the following example I created Helpers для clo, met & va (can be olso a sensor):
Indoor Thermal Comfort Tool — Advanced Thermal Comfort Metrics for Home Assistant
Why Use PMV, SET, and PPD?
Repository: Indoor Thermal Comfort Tool for Home Assistant
