With the improvement of living standards, the demand for home heating is gradually increasing.
Nowadays, people often hear in the decoration market ask: If your home is ready to install a natural gas wall-mounted boiler, is it still necessary to install a water heater?
In order to understand the questions, this popular science article will tell you whether wall-mounted boiler can replace gas water heater !
First of all, you need to understand that natural gas wall-mounted boilers are mainly divided into two types:
One is a single heating household boiler, that is, it is only responsible for heating the household;
The other is a household boiler that combines heating and domestic hot water. It can not only be responsible for home heating, but also for providing domestic hot water.
So, although many of the gas wall-mounted boiler 's job is to supply "plumbing" water, it is no problem to supply some domestic hot water.
That is to say:
Theoretically, a wall-mounted boiler can replace a gas water heater! Why is
said to be "theoretical"?
may have pitfalls because of actual use!
The first pit: the water temperature fluctuates greatly!
Common wall-mounted furnaces use "casing" heat exchanger
This is a low-cost solution to two water use solutions.
Whether you have any needs for domestic water use or not, we are always heating it for you.
, but it seems that there is no waste. will actually cause large fluctuations in the temperature of domestic water. Especially the first section of the water just boiled, it may be very hot! There is an upgraded version corresponding to
, called "board change" ! Look at the picture!
Usually only heating water is used. When domestic water is needed, the three channels next to it will be turned on. Domestic water is heated by heating hot water in this " plate heat exchanger ".
Because the temperature of heating hot water will not be very high, and the heat exchange is relatively stable, can ensure that the temperature fluctuations of domestic hot water will not be too large.
But as people refine their lives, the requirements for to change the temperature of bath water temperature are becoming more and more "precise" .
Now there is a gas water heater that has "0.1 degree constant temperature" , and it is already very common to achieve within 0.5 degrees (domestic ±0.5 degrees, and some Japanese ±1 degrees).
In addition, gas water heaters have developed rapidly in the past two years, and various special functions have emerged one after another (especially domestic). has gone from temperature control to healthy water quality, from intelligent control to reduced energy consumption...
So the question is:
If the temperature of the domestic water used in the wall-mounted boiler fluctuates greatly, and the quality in all aspects is not as good as that of the domestic gas water heater with less than 2,000, would you still choose to use the domestic hot water of the wall-mounted boiler?
The second pit: the accessories have a short life!
Although the plate heat exchanger can solve the problem of fluctuations in most domestic hot water temperatures, controls the fluctuations in water temperatures within ±1℃, but it brings three other new problems:
1) The price is much more expensive than the casing type! Because the structure is complex, it will basically be 50% to 100% expensive!
can be obtained if the tube type is less than 4,000 yuan, but many plate-changing types start at 8,000 yuan (imported). It is better to buy another gas water heater than to spend 4,000 yuan~
2) The plate-changing domestic hot water also obtains heat from heating water, so the heating water pump will continue to operate even in summer, resulting in a shortening of the pump life.
The water pump hidden in this kind of wall-mounted boiler or water heater is the smaller the size, the more expensive it is. At present, it is basically imported core technology for control. It is expensive when you buy it, and it is not cheap to change one!
3) When domestic hot water is used, the "three-way valve" will be frequently activated. This is also a consumable part and is not cheap!
tube type does not have this three-way valve at all, so it will not be damaged.
(By the way: the two common "gas ratio valves" are also a frequently broken accessory, one is 2,000 yuan...)
The third pit: the big brand board changing domestic hot water is not even a good idea!
Theoretically, "board change" should ensure that the temperature of domestic water is more stable, but in fact, it may not be so good...
Let's take a look at the evaluation of users of a big-name store:
spent more than 9,000 yuan and bought a German brand. The final conclusion is:
It is recommended to keep the water heater at home! !
