Question: how much energy is used to heat water for a shower?
Answer: How much energy is required to heat the water that will be consumed when one person has a shower? Using a 9 l/min shower head for a 6 minute shower results in 54 litres of water being consumed. 54 litres heated from ambient 15 deg C to shower temperature 40 deg C requires 1.6 kWh of energy.