Hotwater-appliace-usage

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Hot Water Appliances and Fixtures:

  • Miller Farm Water Fixtures (w/ hot water):
    • (2) Showers
    • (3) Bathroom Sinks
    • (1) Kitchen Sink
    • (1) Washing Machine
  • Water Heater AO Smith ProMax ECT-52
    • Element Wattage: 4500 Watts
    • R-rating: 16
    • Storage Capcity: 50 gal.
    • Tempeature Setting: 125 degrees Farenheit (as per thermastat)
    • Energy Efficiency Factor: .91
    • First Hours Rating: 58-62 gallons
    • Recovery Rate: 21 gallons by 90 degees F in one hour
  • Clothes Washer Maytag model MAT12PDBAW
    • Total Average Water Used per Load: 31.5 gal.
    • Average Hot Water Used per Load: 6.5 gal.\

Hot Water Usage

Through using a number of online source we compiled these hot water estimates:

  • Showering: 20 gal. (only the GRU table listed their number based on a 10 min. shower at 2.5 gal./min)
  • Shaving: 2 gal.
  • Washing Hands and Face: 2.6 gal.
  • Shampooing Hair: 4 gal.
  • Hand Dishwashing: 3.6 gal. (seems low)
  • Clothes Washing: 25 gal. (only GRU listed usage for various washer settings, note that this number does not corrolate to the model information)
  • Food Preparation: 5 gal. (DOE listings)

By using these estimates we figured that we use the following amount of hot water each week:

  • 42 showers per week
  • 12 shaves per week
  • 100 hand and face washings
  • 7 dish doings per week (one per day but figure 7.2 gallons as there are more occupants than what the above average assumes)
  • 5 food prep
  • 6 loads of laundry

The average daily usage is therefore: 192 gallons of hot water

  • per person: 28 gallons of hot water per day

Note: The above estimates are made assuming 7 residents, which is the average annual number of occupants.