Much has been debated over exactly what is an ideal water heater temperature level setting. Many sources, including ENERGY STAR, provide the energy conserving elements of temperature levels of 120 degrees or lower. And yes, there are cost savings to be had, but realistically for those whose existing setting is closer to the standard factory preset temperature of 140 degrees.
On the other hand, fewer share information about the possibility of contracting Legionella bacteria with a lower setting, specifically with a temperature lower than 120 degrees. OSHA specifies some excellent precautions for preventing this.
Water Heater Repair Sacramento’s conclusions are that it is something that each family has to weigh in terms of possible health issues primarily. For those with children or with elderly individuals in the house, a higher setting can be a water scalding issue. Alternatively, those susceptible to contracting respiratory infections, a higher setting needs to be used.
Below is an infographic highlighting the various temperature level growth ranges of Legionella.
Check out our article on Sacramento 10 Minute Water Heater Maintenance Check also!