Water Heaters: How Water Is Heated
A water heater looks like a big metal cylinder with tall drums that are consigned to a laundry room or basement. It is used to warm water for a hot shower or bath. The water heater generally has a drum filled with water and has a heating mechanism on the bottom or inside.
There are many components inside a water heater. The tank is the inner shell, which contains a water protective liner that holds 40 to 60 gallons of hot water. Its exterior is covered in an insulating material and a decorative outer shell. The dip tube channels the water, which travels to the bottom of the tank where it is heated. The shut-off valve stops the water flow into the water heater and the heat-out pipe allows water to exit the water heater. The thermostat is a measures the current temperature of the water. The heating mechanism is needed to heat the water and the drain valve, which is found near the bottom of exterior housing, to empty the tank to replace the elements and remove sediment. The pressure relief valve keeps the water heater safe and the sacrificial anode rod prevents corrosion.
The thermostat controls the temperature of the water inside the tank. You can set the temperature of your water heater between 120 and 180 degrees Fahrenheit. 120-140 Fahrenheit is enough for household use. You can save energy by lowering the temperature. Most water heaters have thermostats that are underneath a protective cover plate and have a knob or dial you can turn to set the temperature.
High-efficiency hot water systems like the industrial hot water systems use the dip tube to feed cold water from the water lines to the bottom of the tank’s exterior, where water begins to warm up. The heating mechanism remains active until the water reaches its temperature.
As the water begins to warm up, it rises to the top of the tank. Reliable hot water systems such as the industrial hot water heaters use the heat-out pipe to make water flow out of the heater because hot water rises above the denser, cold water.
What makes an effective hot water system like the industrial hot water heaters is its design. A good hot water heater is designed to follow the basic principle: cold water enters the tank, gets heated, and hot water exits the heater and travels to your shower.
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