Water heater temperature?

Q.: What temperature should the water heater be set at in a typical home that would allow for disinfecting dishes (in the dishwasher).
A.: You can’t get the water hot enough to disinfect the dishes in a home environment unless you are boiling the dishwater on the stove. To disinfect dishes requires a water temperature of at least 180 degrees Fahrenheit and the typical residential water heater’s maximum output is in the neighborhood of 140-145 degrees. Even if you did operate your water heater at this temperature, it would burn out in as little as three months, maybe even less. Besides, running your water heater at this temp will also void any warrantees you may have on it also. To run at the 180 degrees that you need to disinfect, only commercial-rated water heaters will do this without burning them up in the process. These will typically be found in businesses like restaurants and such. And don’t even think about it, they are way too pricey for home use. By the way, the normal operating temperature setting in a residential water heater is around 120 degrees Fahrenheit on one and two element water heaters, and it’s the dish soap that disinfects the dishes in your home, not the hot water. And while we are at it, there is no such thing as a “hot-water-heater”! Why would you need to heat “hot-water”? The proper name for it is a “water-heater”.



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