Zero cold water is one of the mainstream technologies of gas water heaters. The principle of zero cold water is to add a circulation pump to the original water heater. When the zero cold water mode is turned on, the water at the end of the hot water pipe can be pumped back to the gas water heater for reheating. , which can ensure that the water in the water pipe is always hot, and the hot water can be used directly when the tap is turned on.
After turning on the tap of a traditional water heater, the cold water in the water pipe needs to be drained, and then there will be hot water. Especially in the cold winter, the waiting time for hot water is quite difficult.
Therefore, the comfort of zero cold water technology is relatively high. Hot water can flow out when the tap is turned on, without waiting, which is also one of the reasons why many people pursue zero cold water. Is the zero cold water gas water heater easy to use? Is it suitable for ordinary households to install zero cold water?
There are two types of zero-cold water gas water heaters: those with return pipes and those without return pipes. The solution with the return pipe is to install a check valve at the end of the hot water pipe and connect the return pipe to the water heater. When in use, the circulation pump is used to circulate the cold water cooled in the water pipe to reheat the water heater to achieve zero cold water.
Since the laying of the return pipe requires the reconstruction of the water pipe line, the project volume is relatively large, and it is generally better to lay it directly during the renovation of a new house or the renovation of an old house. If the water pipeline is rebuilt simply for the purpose of installing zero-cooled water, the cost is relatively high, and it is generally not recommended.
Households that have not laid return pipes in advance can choose the way without return pipes. Only the cold water pipe can be used as the return pipe in the way of no return pipe, which can also achieve the effect of zero cold water.
Although the solution without a return pipe is more convenient and relatively low in cost, it may happen that all the water pipes in the house are full of hot water, causing unnecessary waste.
The simple cold water pipes laid in some households are not hot and cold water pipes. The use of such water pipes will not only affect the service life of the water pipes, but may even precipitate some toxic and harmful substances, so it is not recommended to use them.
In addition, the cold water pipe is full of hot water, which may cause damage to the water purifier and other equipment at home. Therefore, it is not recommended to choose a zero cold water solution without a return pipe.
In addition to the above, another disadvantage of zero cold water is that in order to maintain the water temperature in the water pipe, it is necessary to continuously start the circulation pump for heating, so additional electricity and gas costs will be incurred, and the cost of use is relatively high. A certain amount of noise affects normal life.
At present, each manufacturer has a certain response plan to avoid waste. You can choose to set the cycle mode according to your own situation.
The circulation mode of zero cold water mainly includes several modes such as all-day circulation, single circulation, inching circulation, and timing circulation.
Among them, the all-day cycle need not be elaborated. The zero-cold water mode is turned on around the clock, and the cost of use is relatively high.
A single cycle is to start the cycle through the mobile phone APP, remote control, etc. before use, and stop after the temperature reaches the set standard. If the single cycle button is not pressed again, it will not start again.
This mode should be the most practical one, especially in the cold winter, turn on the cycle before taking a bath, wait for a few minutes and then turn on the tap to use hot water, that is, you can take a bath directly when you change clothes and get a towel, which is comfortable Extremely high.
The way of inching circulation is to turn on the faucet for a few seconds before use, turn off the faucet, the circulation pump starts to cycle, wait for a few minutes, and then turn on the faucet to produce hot water.
However, if this method is just a simple hand washing, it is not very useful. If it is a bath, it is not as convenient as a single cycle.
The other is the timer mode, which is more suitable for families with a regular life and work schedule. For example, get up at 6 o’clock in the morning and arrive home at 8 o’clock in the evening. You can set these two times so that you can get up in the morning to wash your face and go home to take a shower at night. Use hot water directly.
Generally speaking, zero-cold water gas water heaters are more suitable for families with long water pipes, regular life schedules, or rich families. Of course, zero-cold water gas water heaters are still extremely comfortable.
When choosing a gas water heater, you should pay more attention to the constant temperature technology of the water heater. For families living in high-rise buildings with many water points and unstable water pressure, choosing a gas water heater with a water volume server has the best temperature control effect.
