How many gallons / litres is your home water heater?
We live in a suburban 4 bedroom detached home. I find that after my wife and kid shower, I’m stuck showering in cold water.
Are they using too much water or is my water heater just not big enough?
Edit: not my photo. We currently have a 50gal tank.
It depends where you live and your usage/situation. In Canada on demand heaters are kind of rare as the water in winter is much too cold to be heated instantly. It’s possible but it takes “beefy” heaters, so tanks are much more common.