Water Heater Recovery Rate

The charts below are based on gallons per hour gph.

Water heater recovery rate.

Gas water heaters have a quicker recovery time about 50 gallons per hour compared to around 14 gallons per hour of an electric water heater. The official definition of the recovery time or recovery rate for your water heater is the amount of hot water that your water heater can provide in one hour once it has been completely drained. A water heater s recovery time also called recovery rate is the amount of hot water in gallons a tank water heater can provide in just one hour after being completely drained. Calculate the additional load using section vi heater with a recovery rate of 1116 gph 40 f to 140 f and 368 gallons storage.

The remaining 25 of the heat is used to move the products of combustion through the flue to the outdoors. The recovery rate is measured in gallons and basically provides an idea of the speed of your water heater in providing hot water. Recovery rate basically gives you an idea of how fast a water heater can heat water. The higher btu burner the better it generally is for recovery.

Beginning with a full tank of hot water a heater with a storage tank can deliver in one hour roughly the number of gallons given as its recovery rate plus about 70 of its tank capacity. Electric water heater recovery table calculated at 100 recovery efficiency gph recovery at indicated temperature rise. The amount of hot water provided will depend on several things. Usually 100 f is used but sometimes 60 f.

They need to be properly ventilated allowing exhaust. Now knowing the recovery rate of a water heater is important for 2 big reasons. For a typical 50 gallon electric water heater with dual heating elements a 20 gallons hour recovery rate is good. To determine temperature rise subtract the incoming water temperature from the desired output temperature.

This means 75 of the total heat produced by the burner is absorbed into the water in the tank. To reduce flow rates install low flow water fixtures. Here s the official definition. The recovery rate is the amount of hot water the water heater is capable of producing in a given period of time.

Once the actual hot water flow rate is known the heater can then be selected for the total demand and. Wattage of the heating elements burner size efficiency temperature rise required and the time frame used to measure the recovery rate. The flow rate through the demand water heater would need to be at least 3 25 gallons 12 3 liters per minute.