Assertion: water heater's capacity | /r/AtLocation | the united states
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text: All new gas storage tank water heaters with capacities smaller than 55 US gallons (210 l; 46 imp gal) sold in the United States in 2015 or later shall have an energy factor of at least 60% (for 50-US-gallon units, higher for smaller units), increased from the pre-2015 minimum standard of 58% energy factor for 50-US-gallon gas units.