Core Viewpoint - The China Consumers Association released a comparative test report on 20 gas water heaters, indicating that overall quality is good, with recommendations for consumers to choose based on personal needs [1][2]. Group 1: Test Overview - The test included 20 samples from 15 brands, including leading brands like Fotile, Vatti, and Bosch, focusing on safety, energy efficiency, and constant temperature performance [2][3]. - All tested products had CCC certification, energy efficiency levels of grade 2 or above, and rated hot water output capacities between 13 kg/min and 16 kg/min [2]. Group 2: Performance Highlights - Two products achieved grade 1 energy efficiency: Vatti JSLQ27-i12253S-16 and Wanhe JSLQ27-LS9D16 PRO, while the remaining 18 products met grade 2 efficiency [3]. - All samples met national standards for carbon monoxide (CO) emissions, with Vatti JSLQ27-i12253S-16, Fotile JSQ30-S16D1-FR, and Bosch JSQ32-AS showing CO levels below 0.01% [3][6]. Group 3: Consumer Experience - Vatti JSLQ27-i12253S-16 demonstrated excellent performance in maintaining stable water temperature during usage interruptions, with temperature deviations controlled within 0.3°C [7][8]. - The product features advanced technology for quick heating and energy savings, achieving a 43% reduction in gas consumption and a 60% decrease in heating time [11]. Group 4: Market Position and Trends - Vatti has established itself in the high-end market, introducing innovative products like the "beauty bath" water heater, catering to health-conscious consumers [9][13]. - The report indicates a shift in consumer preferences towards features that enhance comfort, such as constant temperature and health benefits, suggesting a trend towards premiumization in the water heater industry [13].

Core Viewpoint The China Consumers Association conducted a comparative test on 20 popular gas water heaters to provide consumers with objective and comprehensive product information, focusing on safety performance, energy efficiency, and constant temperature performance. Group 1: Sample Selection - The samples were purchased by the China Consumers Association staff as ordinary consumers, covering 15 brands with prices ranging from 2200 yuan to 7769.3 yuan [1] - The selected gas water heaters had CCC certification, energy efficiency levels of grade 2 or above, and a rated hot water output capacity between 13 kg/min and 16 kg/min [1] Group 2: Testing Projects - The testing focused on three core areas: safety performance, energy efficiency, and constant temperature performance, following national standards [5] - Key testing items included thermal efficiency, carbon monoxide (CO) content in flue gas, excessive wind pressure safety device, water temperature rise during water stoppage, minimum thermal load, cycle fluctuation, water temperature overshoot, and water temperature accuracy [6] Group 3: Main Conclusions - Thermal Efficiency: All samples met the claimed energy efficiency levels, with two models achieving grade 1 efficiency and the remaining 18 achieving grade 2 [7] - Carbon Monoxide Content: All samples met national standards, with some models showing CO levels below 0.01% [7] - Excessive Wind Pressure Safety Device: All samples met the national standard, with some models exceeding 700 Pa in wind pressure action value [7] - Water Temperature Rise: All samples demonstrated good temperature control, with four models showing a rise of no more than 0.5K [7][8] - Minimum Thermal Load: All samples met national standards, with some models showing a ratio of minimum thermal load to rated thermal load of less than 10% [8] - Cycle Fluctuation: Ten models showed temperature fluctuations of no more than 4°C under varying water flow conditions, indicating good constant temperature performance [9] - Water Temperature Overshoot: Eleven models maintained a temperature fluctuation of less than 2°C, reflecting good constant temperature performance [9] - Water Temperature Accuracy: All samples showed a deviation of water temperature within ±1°C under stable water flow conditions [9] Group 4: Performance Analysis - Thermal Efficiency: Higher thermal efficiency indicates better energy-saving performance, with two condensing gas water heaters achieving grade 1 efficiency [10][11] - Carbon Monoxide (CO) Content: All samples complied with the standard, with some models showing significantly lower CO levels [13][14] - Excessive Wind Pressure Safety Device: Most samples exceeded the required wind pressure action value, ensuring safety [15][16] - Water Temperature Rise: Most samples controlled the water temperature rise effectively, with several models showing exceptional performance [17]