I tend to agree from what I've read, but then I've not read extensively on this. I do run mine at 140 and at this temp, you should have a tempering valve to drop the output. Many dishwashers have auxilliary heat to bring the thing up to temp, but few washing machines in the US do. There's a push to only wash in cold, but I'm still not convinced that's the best for all stains and fabrics. There's a discussion on this in the Tankless section.