Why does such a small turn of the hot water faucet in the shower result in such a drastic change in temperature?
In: Engineering
It’s a dial that always sits at 100% pressure.
At one end, it’s 100% hot. At the other end, it’s 100% cold. In the middle, it combines the two, but the volume of water passing through is the same.
Let’s say the cold water is at 5°C, and the hot is at 50°C. Body temperature is 38°, and a comfortable shower is around 40°.
This means that you’re mixing at about 80/20.
Mix at 70/30, and the water drops 4°, below body temperature. 90/10, and you’re at 45°, close to burning your skin.
So the comfortable range is quite small. Any change moves you to either side of it rather quickly.
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