Depends on the work. If I'm sitting at a computer and not particularly doing anything physical, 35c to 40c isnt bad. Perhaps even enjoyable. If i'm lifting equ

Depends on the work. If I'm sitting at a computer and not particularly doing anything physical, 35c to 40c isnt bad. Perhaps even enjoyable. 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.