advice about heat from Yale.
didn't know this.
"Be careful using fans in extremely hot weather: If the temperature is approaching
100 F, particularly if the air is dry,
running a fan can be more dangerous for your body."
They don't exactly explain in what way fans can be dangerous...
@Tacitus_Kilgore @tgraph52 @holon42
I think they're oversimplifying. If there is no air moving and the humidity is high, the air layer near your body will be hotter than ambient temperature. A little air movement will reduce your temperature. If it's very dry humidity, it will dehydrate you more than it cools you (since you're evaporating fast anyway) and could make you sicker.
@Tacitus_Kilgore @tgraph52 @holon42
The temperature outside makes no difference if windows are closed, which is the problem when elderly people are fearful of crime and cook inside their homes.
@EileenKCarpenter @Tacitus_Kilgore @tgraph52 @holon42 Used them all the time to measure humidity within hospital darkrooms. Too humid? Film dispensers and automated cassette systems would stick. Too dry? Static electricity artifacts on radiographs which actually look really cool; like lightning bolts.
@Tacitus_Kilgore @tgraph52 @holon42
Moving air doesn't make you hotter, though. That's why sling psychrometers can measure humidity.
https://www.sciencedirect.com/topics/engineering/sling-psychrometer