How Much Water Do I Use?
One of the most important considerations in choosing the right water heater is the capacity. The goal is to be able to provide enough hot water at the busiest time of day. The average American uses approximately 30-80 gallons of hot water per day, depending on the family size. The important performance parameter for water heater sizing is the First Hour Rating, which is the maximum volume of hot water than can be supplied in 60 minutes.