Assertion: water heater's burner | /r/CapableOf | produce as much as 180,000 btu/hour
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text: A typical whole-house model, sized to allow two showers to be used at the same time or for someone to shower while the clothes washer or dishwasher is operating, will have a burner producing as much as 180,000 Btu/hour; the largest tankless water heaters have burners over 300,000 Btu/hour.