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Two conflicting safety issues affect water heater temperature—the risk of scalding from excessively hot water greater than 55 °C (131 °F), and the risk of incubating bacteria colonies, particularly Legionella, in water that is not hot enough to kill them. Both risks are potentially life-threatening and are balanced by setting the water ...
Safety: Tankless water heaters precisely control water temperature, which means dangerous temperature levels and spikes are less likely. [9] An additional safety advantage stems from reduced exposure to dissolved toxic metals, which tend to occur at higher concentrations in hot water which has resided in a conventional water heater tank for ...
Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.
The terms convection heater and convector refer to a class of devices in which the source of heat is not directly exposed. As domestic safety and the supply from water heaters keep temperatures relatively low, radiation is inefficient in comparison to convection. [citation needed]
Whenever using space heaters in a bathroom or kitchen, take all precautions to reduce the risk of electric shock whether that's positioning your heater away from water sources like sinks and ...
A common application is to permit operation of an electric water heater at a temperature hot enough to kill Legionella bacteria (above 60 °C, 140 °F), while the output of the valve produces water that is cool enough to not immediately scald (49 °C, 120 °F).