Humidity matters a lot. Get a dehumidifier. The cheapest electrical dehumidifiers are air-conditioning.
You'd be surprised how much heat they dump into the air. 400 watts of dehumidification can easily be 1200 watts of latent heat.
You should think of dehumidifiers as small space heaters that dry the air a bit.
I'm sure they don't add heat anywhere.
If i'm lifting equipment, moving desks, that sort of thing... 20c, at 25c im going to be soaked from sweat.
If im working with hot work, like welding or some foundry or greenhouse, probably same idea around 20c. 25c will be too hot to deal with it.
If I've acclimated - a very dry, breezy mid-30's (C) or mid-90's (F) is still workable, if not optimal, for work with minimal physical exertion.
- Spell that for me
- Impossible