When it comes to choosing a gas water heater, many people first consider which brand to buy, in fact, I think that the difference between the brands is really not big, the basic of the United States, Wanhe, Gree are more well-known brands.
Choose a water heater I recommend that you compare the number of liters, because the size of the number of liters will affect the amount of water, how many liters should be selected for different apartment types?
Let's first look at what does the liter of gas water heater mean? Many people think that the number of liters refers to capacity, but it is not. The number of liters refers to "the amount of hot water that can be produced per minute when the water temperature is raised by 25°C"
13 liters or 16 liters or other values are not exactly the standard values. We generally follow this formula to calculate the amount of hot water per minute = (temperature rise constant 25 degrees * machine rated liter) / (set water temperature - inlet water temperature)
Let's take an example, if we take a bath with 40 degrees of hot water in winter, the water temperature when the water is 4 degrees, and the actual water output per minute of the 13-liter water heater is (25 * 13) / (44-4)≈ 8 liters.
In general, it is enough for a family with a kitchen and a bathroom to choose 13 liters, but if it is a relatively cold place in the north, it is recommended to choose 16 liters. If you do not use much water at home at the same time, then choosing 13 liters is definitely a more cost-effective choice, so it is also natural for more and more people to choose 13 liters of water heaters.