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September 11, 2012
To achieve savings, the first step is to calculate flow rate and temperature rise to properly customize your tankless system for maximum savings. How tankless water heaters work Tankless water heaters achieve significant energy savings by heating water instantaneously. Heating water as it’s needed at a water outlet with an electric or gas-powered heating element eliminates stand-by heat loss (reheating stored water after it cools) commonly identified with storage-tank water heaters. Because of instantaneous water heating, tankless water heaters ensure a ready and endless supply of hot water. Customize for savings and ample hot water You will save the most energy, and you can meet the hot-water needs of your household, by accurately calculating flow rates and temperature rise.
- The flow rate of a single outlet is the total water flow in gallons per minute (GPM) that it can supply.
- The accumulated, maximum amount of hot water needed at one time is your entire household’s flow rate.
- Temperature rise is the difference between the hot-water temperature you desire and the temperature of inflowing water.
- The flow rate of a tankless water heater (no matter its size) is the maximum GPM of hot water that it can supply on-demand by factoring the temperature rise.