Where Do You Find the Capacity of a Water Heater?


Quick Answer

Manufacturers list the water heater capacity on the ratings plate. With tank-style water heaters, the capacity is in gallons. This plate includes other important information, including the manufacturer, model, serial number, wattage of the heating elements and length of the warranty.

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Full Answer

Knowing the capacity of the current water heater helps the homeowner make decisions regarding a replacement. If the family often depletes the hot water supply when using the current unit, the owner should consider a larger capacity. However, larger units require more energy to operate.

The capacity of tankless water heaters is provided as the maximum temperature rise possible at a given flow rate. With these models, the unit does not store hot water in the traditional tank but heats it on demand.

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