Water heater recovery rate measures how quickly a water heater can heat a volume of water from one temperature to another, typically expressed in gallons per hour (GPH). This metric indicates the system’s ability to reheat water after hot water has been drawn from the tank, directly affecting how much hot water remains available for continuous use.
Technical Details
Recovery rate depends on the heat source and input capacity. Electric water heaters typically recover at 2-5 GPH, while gas models recover at 20-40 GPH. The formula accounts for the temperature rise (usually 90°F differential) and fuel input rate measured in BTUs per hour.
Practical Applications
A higher recovery rate benefits households with heavy hot water demand, such as families taking consecutive showers or running multiple hot water appliances simultaneously. Gas water heaters’ superior recovery rates make them preferable for larger households, while electric heaters suit smaller residential situations.
Significance for Selection
Recovery rate complements tank capacity in determining overall hot water availability. A 50-gallon tank with high recovery can outperform a 75-gallon tank with low recovery in real-world usage scenarios.