The maximum temperature of water from tankless water heaters intended for domestic use shall not exceed ____ ﾟF.

The correct maximum temperature for water from tankless water heaters intended for domestic use is 140 °F. This standard is set to prevent scalding and protect users' safety. Water at temperatures above 140 °F can cause serious burns, particularly in children and the elderly, who may have a higher sensitivity to heat.

Setting the maximum temperature at 140 °F strikes a balance between providing adequate hot water for household needs while minimizing the risk of burns. This guideline aligns with safety recommendations from various health and safety organizations, which advocate for maintaining water temperature in this range to ensure both comfort and protection against thermal injuries.

In contrast, temperatures above this limit could present significant safety hazards, making it crucial for regulations to establish the maximum threshold. The other options, while higher, do not adhere to safety practices and could lead to increased risk of scalding incidents.