The two brands of gas water heaters are almost the same. I did some research on them before buying a water heater, although in the end I didn’t buy either brand. . . Rinnai is from Japan, and Remi is from the United States. However, Rinnai sells better in China. It seems to have entered the country earlier. Remi mainly does large-scale commercial projects in China. There are many large boilers in airports, hospitals, and hotels, and small boilers. Gas water heaters are also relatively expensive. There are not many domestically produced water heaters, and they are basically produced in the European and American markets.