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Recovery rate is the amount of water that is heated to a set temperature, per hour. An draw efficiency and gallon capacity of the water heater may be used to calculate the length of the showering period in minutes. Characterized for its maximum hot water use to calculate the peak hot water demand.
A water heater can generate 7200 kcal/h. How much water can it heat from 15 C to 50 C per hour? The ratio is that 1 Cal (kcal) of heat can heat 1 kg of water by 1 C. Using this ratio, we divide the Q by the temperature change. You dont need to calculate the time because it's per hour meaning we are only trying to figure out one hour here. 9.