Yes, setting your water heater to 140°F (60°C) is acceptable and often recommended for specific household requirements, such as running high-demand commercial dishwashers or for individuals with respiratory sensitivities who require higher temperatures to inhibit Legionella bacteria growth in the tank. However, 140°F water increases scalding risks and energy bills, so it is strongly advised to install a thermostatic mixing valve downstream to blend cold water into the supply line, delivering safe 120°F water to your taps. Verification: Check local plumbing codes regarding mixing valve requirements.
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