What is the maximum temperature of water from tankless water heaters intended for domestic uses?

The maximum temperature of water from tankless water heaters intended for domestic uses is established at 140°F. This temperature is considered safe and effective for typical household needs without the risk of scalding, especially for young children and elderly individuals who may be more vulnerable to burns.

Setting the temperature limit at this level also helps in conserving energy, as excessively high temperatures can lead to wasted energy and increased operating costs. It is important to note that while some systems may allow settings higher than this temperature, 140°F is recognized as a standard for safety and efficiency in domestic applications. This consideration is critical for compliance with building codes and safety standards.

In contrast, higher temperatures, such as those exceeding 140°F up to 180°F or more, are generally used in commercial applications or specialized circumstances, where the requirements differ from residential needs. These high temperatures are not typically recommended for standard household plumbing systems due to the increased risk of burns and greater energy consumption.