Before buying, you must first consider the type of gas source: When choosing a water heater, different types of water heaters are often different, and your home is natural gas, liquefied gas, or artificial gas. Although the country has started natural gas transformation, this problem may not be repeated in the future. However, there are still some communities that have not completed reconstruction, so they still need to pay attention. 
Ascendant selection: Do not just choose to stay stuck in the range. It is best to increase the capacity of 1-2 liters slightly, taking into account the frequent use of hot water in winter, otherwise there will be hidden dangers. In general, a family of three in a bathroom can choose between 10 and 11 liters; a family of five in two bathrooms can choose between 13 and 16 liters. 
Installation requirements: The water heater must be installed in the kitchen or balcony when installed. If you want to put it into the cabinet for beauty, you must make the door of the cabinet into shutters. It must be ventilated. Of course, it is better to be bare. In addition, the location of the chimneys and platoons must be reserved in advance, and the installation of the chimneys will be troublesome and even require extra charges. If you must be installed in the bathroom, remember to use only a forced balance water heater. 
The function to pay attention to when purchasing is different according to the bathing method. When purchasing a water heater, the functions that should be emphasized are slightly different: 
1. People who like showering: should first consider precise temperature control and instant heat function. Accurate temperature control function can avoid hot and cold during bathing. A good water heater can be controlled within ±1°C by microcomputer, which is not the temperature difference that the human body can directly sense. And that the thermal function can realize the water heater is turned on and out of hot water, and it is no longer necessary to take off the hot water in the bathroom. 2. People who like bathing: should first refer to the thermal efficiency index. Among them, thermal efficiency can greatly reduce the cost of use, such as water heaters with condensing function, can achieve secondary heating by condensing the flue gas, a good condensing water heater can save 23%, which means that the average family can save gas costs every year 203 yuan. 
The most neglected function Water temperature rise: After the water heater is turned off, it will be turned on within 5 minutes. Usually there will be a period of hot water that is higher than the set temperature. This temperature difference is the water temperature rise, which is the normal water heater. It is often easy to burn the skin, and a good water heater can reduce this temperature difference to 1°C, which is almost negligible. Minimum hot water yield: People like to use hot water bath to eliminate fatigue in summer, and sometimes they think that how to adjust the water temperature is a bit too high, it is easy to turn off the small and small, this is because the reason for the minimum hot water yield is too high, a good water heater The minimum hot water yield can be reduced to 1.6 liters/minute so that you don't feel hot when you soak up. Water heater purchase
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