Hi, this has been extensively discussed before.
The idea here is for a fan to turn on off based on comparing a humidity sensor’s value to a reference humidity.
For example, this could be the humidity in the house at the thermostat. It could be based on the local weather. You can use this automation to have the humidity in your bathroom trend with the humidity outside of the bathroom (which may change with the weather).
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Hi,
I am working on an automation to switch on/off a fan in our basement, to reduce humidity. My first approach does work, but not as smoothley, as I hoped. (-> Reduce humidity in basement - automation does not work )
I want to try a different approach, but I am struggling with the “wait_template” in my automation.
My idea:
My automation does start the fan as expected.
To switch the fan off, I added two conditions in the wait_template. If one or the other is true, the fan should stop. Unfort…
I myself used a trend-sensor for outside-dewpoint. If dewpoint is falling and bellow inside dewpoint, I switch the fan on. And I added a delay to stop the fan from ‘flickering’, if trend-value jumps around 0.
Trend - Home Assistant
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