Not siding either way , but when different temperatures come together it "can" cause problems, ie clothes shrinking in the wash , scalding , cracked windows etc, i know thats extreme temps but maybe there are effects that can take time to come to light !
there is a lot of advertising from washing powder companies about washing at lower temperatures because it's kinder to the clothes and uses less energy ?
I would like to try hot for a day just to see and i'm interested in the ls heater as well but i can still do my work without so no rush.