I have a new Hot Springs Solana that is also 104 and feels like bath water. I had a HS Prodigy for 14 years which was always hot. I would guess 106. Loved it!! I live in NY and 104 will never work for my arthritis. Anyone ever modify a Solana? I tried the dealer and sent a note to Hot Springs. They thanked me for my comments but that was all. Please help as it is starting to get cold here.