Why does the gas water heater alternate between hot and cold? What is the difference between a gas wall-mounted boiler and a gas water heater?

Some friends probably don't know much about water heaters, and can't tell the similarities and differences between gas water heaters and wall-mounted boilers. The following is an introduction to the differences between gas wall-mounted boilers and gas water heaters, I hope it will be helpful to you. In addition, we also sorted out and introduced why gas water heaters are hot and cold, I hope you can enjoy using them.

Contents of this article

1. Why does the gas water heater alternate between hot and cold?

2. What is the difference between a gas wall-mounted boiler and a gas water heater?

3. When should the gas water heater be installed?

Why does the gas water heater alternate between hot and cold?

1. Before analyzing the reasons why the gas water heater alternates between hot and cold, let us first understand the national testing requirements for water heaters, which are about flow and temperature issues. This way, it is easy for everyone to understand. According to the national standard GB6932, if the flow rates marked on the water heater are 5, 8, and 10 liters respectively, the explanation is that when the combustion power remains unchanged (for example, 40KW), according to the national test requirements of the inlet water pressure of 0.1Mpa, the outlet water of the water heater reaches 5, 8, and 10 liters/hour, and the outlet water temperature can be 25 degrees higher than the inlet water temperature. This is why we can see the temperature rise of 25 degrees in the product technical indicators (ΔT=25 degrees).

2. If the water outlet of the gas water heater is far away from the water heater, such as if it is installed on the balcony, do you need to confirm whether the cold water of the water heater is turned on? This is very important, because if the tap water is not turned on, once the water temperature is adjusted at the outlet, the water heater will shut down for protection due to insufficient flow and high temperature.

3. If the water pressure is not enough, when taking a bath in winter, many people are used to turning on the hot water switch to the maximum. However, once the water feels too hot, some people turn on the faucet violently. The newly added cold water increases the water flow resistance. When the resistance is large enough, the gas water heater will be turned off. The water will be hot and cold.

What is the difference between a gas wall-mounted boiler and a gas water heater?

1. Different uses: Gas wall-mounted boilers can provide both heating and hot water. It has a powerful home central heating function. Each room can set a comfortable temperature as needed, and can also provide large-flow constant-temperature sanitary hot water for use in the bathroom and kitchen. Gas water heaters can only produce hot water, not heating, and have certain limitations in use.

2. Different energy consumption: Although both gas wall-mounted boilers and gas water heaters are powered by gas or natural gas, due to the difference in their burners, the burners of wall-mounted boilers save about 10%-20% more energy than water heaters. The energy-saving effects of different brands are also different, and specific analysis is required.

3. Different water temperature control: Both gas wall-mounted boilers and gas water heaters can provide hot water, but the gas wall-mounted boiler can set the water temperature in advance from the control panel, and it can adjust the size of the flame according to the set temperature. Although the gas water heater can also set the water temperature, the accuracy is lower than that of the gas wall-mounted boiler.

When to install a gas water heater

1. When should the gas water heater be installed?

Generally, after the water and electricity are installed and the wall and floor tiles are laid, the gas water heater can be installed. There will be no restrictions if you choose to install the gas water heater at this time. Even if there is no integrated ceiling installed, you can drill holes in the wall. However, before installing the gas water heater, you need to first determine the installation location of the gas water heater.

2. Where are gas water heaters generally installed?

1. Gas water heaters are generally installed at the door of the bathroom, because the space at the door of the bathroom is enough to accommodate the gas water heater, and it is also more convenient to use. However, during the installation process, do not connect the gas inside the kitchen, because this will cause insufficient gas.

2. If natural gas is used at home, a natural gas pipeline is usually installed next to the gas stove, but the pipeline is not long enough. In this case, the wall above the gas stove is undoubtedly the best place to install the gas water heater, but a hole needs to be drilled to connect it to the pipeline in the bathroom so that hot water can be supplied to the bathroom.

3. If the bathroom space is large enough and the distance between the bathroom and the kitchen is not long, the gas water heater can be installed inside the bathroom, such as above the washbasin, but the pipes between the kitchen and the bathroom need to be connected, and the pipe length must be relatively long.