We all know that instant electric water heaters are very convenient to use and hot water is ready to use, saving a lot of waiting time. This feature is very beneficial for saving energy and water resources. Today, let's take a look at the advantages and disadvantages of instant electric water heaters. Whether you want to buy such products or not, you still have to decide according to your needs.
There are two types of instantaneous water heaters; instantaneous and fast heating. The power of the instant water heater is relatively large, and the maximum power can reach about 6-7KW. The power of the fast-heating electric water heater is lower than that of the instant-heating type, and the power can reach 4--5KW, and the storage type is about 1.5--2KW. But this is only the highest rated power. In general areas, the water temperature adjusted to half of its power can be used for showering. Take the instant hot type as an example. The highest is 8KW, when the shower is adjusted to half to 4KW, the water temperature can reach about 42 degrees. Can meet the needs of normal showers. Let's talk about wires.
At present, the common 2.5-square-foot wires are commonly found in homes, and their rated current is about 15A. Let's calculate how much power it can withstand. The current multiplied by the voltage is equal to the power = 15A × 220V = 3300KW. It can be seen that the 2.5 square wire is just able to withstand the instant electric water heater. But the loss of the wire is very large. Excessive line heating will shorten the life span. So the 2.5 wire can be PK off.
Let's calculate the 4 square wire again. The 4 square wire can withstand 24A of current. 24A × 220V = 5.28KW. Select the maximum power, that is, the normal use power of the thermoelectric water heater is 8KW, and the normal use instantaneous power is 4KW, so that we can see that 5.28> 4KW. Safe power is greater than practical power. So 4 square is relatively safe, of course, if you have to adjust to the maximum power. The 4-square wire is a bit overwhelming.
1. Advantages of instant electric water heater
1. It is safe, compact and beautiful, clean and environmentally friendly; it is hot immediately after opening, no need to wait for 3-5 seconds of hot water, and the hot water usage time is not limited. Loss; the built-in temperature controller ensures that the temperature is between 30-50 degrees, solving the problem of scaling and water leakage caused by continuous high temperature.
2. Time-saving: The storage-type electric water heater has to go through a long-term preheating process before use. In the winter, using an 80-liter storage-type electric water heater, it takes more than 2 hours, which is a waste of time. The instant electric water heater is hot when it is turned on and can take a bath at any time without preheating in advance, which can save users valuable time.
3. Power saving: The power of the instant electric water heater looks larger, but it is more energy-efficient than the traditional storage type electric water heater. This is because although the rated power of the instant water heater reaches 5KW-8KW, according to the conservation of energy According to the law, high power does not mean high energy consumption (power × time = energy). Compared with water storage type electric water heaters, instantaneous water heaters heat up instantaneously without waiting, saving time, water, space, environmental protection, hydropower The isolation system is 100% safe.
Regarding the energy consumption of the instantaneous water heater, the relevant experts have conducted experiments specifically. The 40L storage type electric water heater with good thermal insulation does not need to use one hour of hot water 24 hours a day, and it also needs to consume more than 1.2 degrees. The greater the amount. Compared with this, instant water heaters save water and electricity, so the country classifies these products as energy-saving products. "Practical use found that instant electric water heaters save 40% -65% of electricity compared to storage-type electric water heaters, so it is the most energy efficient because it takes the least amount of time.
(1) It immediately raises the temperature of the required water, how much to wash, how much to burn, no preheating, no preheating heat loss; how much water is used, put as much water, will not generate excess water will take away a lot of heat. Unlike traditional storage-type electric water heaters, the entire barrel of 60 liters or 80 liters of water must be heated before use, causing a waste of time and energy;
(2) The instant electric water heater uses water to control electricity. When the faucet of the hot water supply system is turned on, the water heater generates heat immediately. After turning off the faucet, the water heater immediately stops operating, and the water heater is controlled by the faucet switch to synchronize. The storage-type electric water heater dissipates heat while heating, which consumes time and electricity.
(3) The power of the instant electric water heater is adjustable, calculated in 20 minutes (the average person can do it), the bathing cost in summer is about 0.15 ～ 0.45 yuan / person, spring and autumn is about 0.58 ～ 0.74 yuan / person, and winter is about 0.89 ～ 1.18 yuan / person. (Power consumption = power X time) (cost = power consumption X yuan / degree)
4. Water saving: If you can't run out of hot water from a water storage tank, it will be wasteful. If it is not enough, it will be very troublesome, so it will cost water, electricity and money. With instant water heaters, you can heat as much water as you want, and never waste hot water.
2. Disadvantages of instant electric water heater:
Disadvantages: The power is too large, and it is necessary to reserve enough power cords in advance for installation. The general power requirement is at least 6KW or more. In winter, the power of 8KW is also difficult to ensure that there is a sufficient amount of hot water for bathing. The power cord requires at least 2.5 square meters or more, and some requires more than 5 square meters.
Summary: After reading the above information, you also have a certain understanding of instant electric water heaters. You should also consider the advantages and disadvantages of them. When purchasing, you can buy according to your own needs.
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