This contest demonstrates that the teams’ houses can provide all of the energy necessary to heat water for domestic uses. Teams will receive points for performing tests that simulate the average time and temperature requirements for two showers each day of the contest week. Twice per day, teams will have to deliver 15 gallons (56.8 liters) of hot water (at least 110ºF [43.3ºC]) in no more than 10 minutes."

- Contest Regulations, pg. 7(PDF 216K)