Abstract: With the development of artificial intelligence technology, the water heater industry has shifted from single-product research to home intelligent hot water systems, significantly enhancing water usage comfort. However, the lack of technical standards and incomplete evaluation methods have failed to meet users’ real needs and enable lateral comparisons between systems. Based on household water usage scenarios and typical water consumption patterns, proposes multiple hot water comfort technical indicators, including water temperature rise during outages, hot water temperature rise, water temperature fluctuations, hot water delivery time, and hot water volume, through literature and standards research as well as user needs analysis. It is recommended to use a weighted comprehensive scoring method to evaluate these indicators. Experimental testing and user behavior analysis verified that the evaluation system can scientifically assess the performance of different systems. Research finding provide scientific theoretical support and technical guidance for research institutions, engineering and technical personnel, and testing and evaluation agencies, promoting development of the standardization process of the industry.

Key words: Households, Water scenarios, Hot water system, Comfort