'Dave at the shower head out put 115 is to hot. I DARE you to take a
115F shower... A hot shower is 104-107 I can not stand 108. But maybe
you dont heat your house so 115 is helping you.'

Rans, Im aware that 100-105 f shower water is ideal, but, i suggested
going a bit higher on the Tank temp. so the person can finish the shower
without running out of hot water if its only a 40 gal . Yes, i heat my
house here in Northern Illinois and that comment of yours was not
required or efficacous -- shall we be friends ?