I am notorious for running water in my home. I turn it on once I get up in the morning to heat the water. I live in a 3 story townhouse so by the time the water warms up, 5 minutes have passed. I know its wasteful. I also run it while brushing my teeth and when I wash the dishes. My challenge is to turn off the water when washing dishes and brushing my teeth. I will work in jumping in a cooler shower once the water warms up.