Adding a soaker tub or multi-head shower? You may need a bigger water heater. Tank-style heaters are labeled with a first hour rating (FHR), a measure of how much hot water it produces in an hour. To help determine your FHR, use the list below to calculate your family's hot-water consumption in the bath each morning. Visit the U.S. Department of Energy for more info on FHR.
Showering: 12 gallons per person Bathing: 9 gallons a person Shampooing hair: 4 gallons a person Washing hands and face: 4 gallons a person Shaving: 2 gallons a person
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