Now that we are here, let’s list the advantages and disadvantages of various water heaters for your reference~
For those who are still worried about buying a water heater, read this article That’s enough~
It’s a long article, but it’s full of useful information. Those who want to be lazy can just scroll to the end to read the summary, and give me a thumbs up by the way?(?)
The following content comes from Haohaozhu APP user @婷多Space Design, and some pictures come from the Internet.
Although water heaters are common household appliances for daily use, it is often difficult to choose. It just so happened that Leon's water heater had been in service for 6 or 7 years recently and had just been replaced with a new one, so he also did some proper homework. There are answers to previous topics, but 1,000 words is obviously not enough, so let’s introduce mainstream water heaters in detail from all aspects.
The mainstream water heaters on the market can be divided into four types: gas water heaters, electric water heaters, solar water heaters and air-energy water heaters. Gas water heaters and electric water heaters are the most mature water heaters with the highest market share. I will focus on this. It is worth mentioning that there is also a type of gas water heater called a magnetic water heater, which adds a magnetizer to the water inlet. The magnetized water It is said to protect the skin and purify water quality. X Tai specializes in this kind of water heater. As for whether it is really effective, Sumitomo can check other people's reviews online. The price is higher than ordinary water heaters). Due to their high cost and large volume, air-source water heaters are generally used in large houses, and more in villas. Interested residents can take a look at them last.
1. Electric water heater
1. Newbie literacy:
Electric water heaters can be divided into water storage type, instant heating type and instant heating type according to the heating power. There are three types of water storage type (also called semi-water storage type). Although ordinary instant electric water heaters and dual-mode electric water heaters are similar in size, their internal structures are quite different. Instant electric water heaters are smaller and more powerful than storage-type electric water heaters, so they are indeed faster in heating speed. Storage-type electric water heaters are faster, but they cannot achieve instant heating in spring and autumn and need to be preheated, that is, they need to wait. However, dual-mode electric water heaters can use instant heating mode in spring, summer, and autumn, and can be turned on immediately. It is instant heat, but of course it consumes more energy. It is also one of the most commonly used small kitchen appliances for basins.
Storage-type electric water heater diagram Internal structure diagram of storage-type electric water heater
The development of electric water heaters today has become a very mature product, and the technology is actually nothing new. It relies on electric heating rods to generate electricity, and a large area of ??electric heating pipes directly heat the water in the water storage tank
Parameters of a certain brand 60L
Image of instant electric water heater (looks pretty) The value is high, and the volume is even smaller than that of a gas water heater. It depends on whether you eat it or not.
Advantages:
①The biggest advantage of electric water heaters is the ease of installation, and they can be installed in commercial buildings without gas.
② The installation location is not very restricted and can be installed alone in bathrooms and other spaces that require hot water. Unlike gas water heaters, which must be installed near gas pipes (but it should be noted that storage water heaters need to be installed regularly Clean the water storage tank, so it is best to set it in a place that can drain water)
③It is hot when it is turned on, because generally electric water heaters are installed directly in the bathroom, and the distance from the hot water pipe to the faucet is almost zero. Of course, The prerequisite is to use an instant electric water heater, and the water storage type needs to be preheated in advance.
Disadvantages:
① Storage-type electric water heaters require a water storage barrel, so they are much larger than gas water heaters, take up more space, and also affect the appearance. Of course, they can Hide it inside the cabinet. For example, in some LOFT designs, electric water heaters are often placed in storage cabinets under the stairs.
② The water capacity of the storage-type electric water heater is limited, and it needs to be burned again after use. Of course, there are also variable-frequency instant-heating storage-type electric water heaters. If you use it while burning, it depends on whether the power is enough. Of course, the power is high. It will definitely consume the same amount of electricity.
③The cost of gas water heaters is higher than that of gas water heaters. The electricity bill is now about 0.5-0.6 yuan per kilowatt hour. The electricity bill for a typical family of three in a year is estimated to be around 1,300 yuan, which is higher than the cost of gas water heaters. Although it is not There will be the problem of gas poisoning, but some electric water heaters will leak electricity and hit the wall when operating in a humid environment, which is a certain safety hazard. Of course, many brands have also issued relevant patents.
3. Key points for purchasing electric water heaters
Capacity selection
Generally, adult men need about 50L-60L of water for showering, and adult women generally use it. More, that is to say, a family of three usually needs 150L-180L of water per day. Electric water heaters work by mixing hot and cold water. 1L of hot water can produce about 1.6-1.7L of warm water. Therefore, an 80L or 100L electric water heater is definitely enough for a family of three.
Inner tank material
The inner tank is one of the most important parts of the water storage electric water heater. It can be said that the inner tank material directly determines the service life of the water heater. There are two mainstream liner types: stainless steel liner and enamel liner. Others include Jingui liner, titanium liner, quartz enamel, etc., which are mainly fancy names for the liner technology of various manufacturers. Considering the anti-corrosion, thermal insulation, service life and other aspects, Jingui liner is currently the best solution. Of course, many brands now have longer warranty periods for the inner liner, and can even replace them for free, so choosing after-sales warranty is also an important reference indicator.
The following is a brief introduction to the differences between the materials of each liner
① Let’s talk about the enamel liner first. In fact, most domestic brands use enamel liner, and there is a layer on the surface of the enamel liner. The advantage of enamel is that it does not rust. However, the low-grade carbon steel plate used in the general enamel liner only has two layers of liner, which has many problems such as fish scale explosion, acid corrosion and rapid dissolution, and its service life is short. Therefore, you should also pay attention when choosing an enamel liner. The quality of the enamel liner mainly depends on the processing technology. As for the so-called different formulas of enamel powder, it is just a mystery. As we all know, as long as a patent is applied for, the formula is public. King Kong three-layer bile is one of the better ones currently on the market.
Some brands that use the diamond three-layer bladder technology include Midea’s blue diamond liner, Haier’s diamond three-layer bladder, and Sacon’s sapphire liner. In fact, the materials and processes are similar, and they all use the same technology. The special ultra-fine powder for enamel in the dry enamel process is sintered at a high temperature of 890 degrees, and finally forms a dense three-layer bladder, including an enamel layer, an adhesion layer, and a decarburized steel plate layer, which greatly improves the resistance to dissolution, explosion, and acid resistance, thus Extend product life. As for the names, they are just different cool names that merchants come up with when doing copywriting in order to reflect product differences when promoting their brands.
Schematic diagram of enamel layer process
②The advantage of stainless steel liner is that it can withstand high temperatures, resist corrosion, and has stable performance and is not easy to rust. However, it is difficult to weld and easily leaves welds. , the welds can easily rust over time, causing water leakage. In order to reduce costs, some companies use very thin stainless steel, which reduces the pressure on the liner and affects its service life. Therefore, there are relatively few pure stainless steel liner on the market, and most of them are coated.
③The Jin Kyu liner is a unique patent of AO Smith electric water heater. After all, it is a water heater faucet. It is normal to have a gap between the patent and other brands. This liner uses the latest technology based on steel plates. , the silicide is baked at a high temperature of 850°C to adhere to the inner and outer walls of the inner tank, which can isolate water from the inner tank and avoid direct contact between water and steel plates. It has the advantages of no rust and high strength. As for whether it can be washed for half a century, you have to buy it and try it yourself. However, AO has an 8-year warranty to replace the inner tank, so I am still very confident in my product.
④The titanium liner is Ariston’s unique liner. It is made of rare metal titanium. We all know that titanium’s corrosion resistance is much stronger than stainless steel. The titanium liner is a 4-layer liner. , the outermost is the titanium steel plate layer, titanium is added to the steel plate to enhance the affinity and increase the degree of corrosion resistance, followed by the adhesion layer, then the enamel layer, and the innermost part of the enamel layer is the titanium protective layer.
And Ariston's electric water heater has a special feature. The heating tube is also titanium-plated, so its corrosion resistance is much stronger.
It should be noted that as the service life continues to increase, the probability of accidents such as leakage and bursting of the inner tank also increases. Therefore, when choosing an electric water heater, you should pay special attention to the following two aspects. The water quality in our country is very complex, and the water pressure fluctuates greatly. The impact resistance of the inner tank is directly related to the quality and service life of the product. Therefore, when purchasing, be sure to choose products with good impact resistance. Domestic brands Generally, the 160,000 times stress test is more reliable. Other processes for protecting the liner, such as anode rod technology, can be understood by looking at the picture and will not be introduced in detail later.
Safety
No matter what kind of water heater, safety must be the first consideration. After all, life is precious. As mentioned earlier in the article, water heaters may leak electricity in complex working environments. Currently, anti-electricity wall technology is a relatively reliable anti-leakage protection measure. This technology has been included in the new national standards for electric water heaters. When purchasing, you can check whether the product has safety technologies such as anti-electricity walls (Haier electric water heaters basically have corresponding patents).
Patent illustration of anti-electric wall and alarm technology
Energy consumption
The biggest indicator to measure the electric water heater is the energy consumption label, which is basically present in all electrical appliances nowadays. The new standard for energy consumption grade labels is divided into three levels. The first level has the highest energy efficiency. You can just look at the label to make a purchase, which is more intuitive.
Energy consumption label icon
2. Solar water heater
1. Novice literacy
Solar water heater converts sunlight energy into It is a thermal energy heating device that heats water from low temperature to high temperature to meet people's use of hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat-plate solar water heaters according to their structural forms. Vacuum tube solar water heaters are mainly used, accounting for 95% of the domestic market share. Vacuum tube household solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. Converting solar energy into heat energy mainly relies on vacuum heat collecting tubes. Vacuum tube heat collecting tubes use the principle of hot water floating up and cold water sinking to cause microcirculation in the water. Get the hot water you need.
Real view of solar water heater Structural description of solar water heater Working principle of vacuum collector tube Schematic diagram of water and electricity connection
2. Comparison of advantages and disadvantages
Advantages:
①The biggest advantage is definitely energy saving. Compared with electric water heaters and gas water heaters, the cost is greatly reduced.
②The technology is mature, it is basically popular in both north and south, and the cost is relatively cheap.
③ If you have a duplex building, you can consider installing two water heaters. Using solar energy in summer and gas in winter is definitely the best choice to save money.
Disadvantages:
①Affected by the weather, temperature and seasonal lighting duration, the use of sunlight is reduced in winter, and if it is placed outdoors, the energy efficiency will definitely be weaker.
② Vacuum tube solar water heaters can generally only be installed on the roof of the top floors of multi-story residential buildings, so there are installation restrictions. Of course, with the advancement of technology, solar products for balconies have gradually entered the market.
③ Because it is installed outdoors, there will definitely be maintenance problems, and the water tank dirt also needs to be cleaned regularly.
3. Use the connection method with the gas water heater.
Many Sumitomo people who live in duplex houses will consider the option of adding a gas water heater and a solar water heater, but they don’t know how to take over the connection to make it easy to switch between the two water heaters. Let’s explain it with a picture below.
Explanation: First, add a three-way L-shaped valve to the cold water inlet of the gas water heater and the hot water outlet of the solar water heater and connect them with water pipes (marked with a five-pointed star), so that the solar water heater will If the power is not good, if you want to use a gas water heater, you can open the valve to let the cold water preheated by the solar water heater enter the cold water pipe of the gas water heater. In summer, when the light is good, you can close the valve of the gas water heater so that the cold water does not pass through the gas water heater. Directly to the solar water heater, allowing it to operate independently.
In addition to the valve diagram, a schematic diagram of heating that combines solar energy and an electric boiler is provided for Sumitomo in need.
4. Precautions when purchasing
Although solar water heaters are mature products, they have many brands, low thresholds, and uneven quality levels. When purchasing, in addition to choosing products with guaranteed quality and after-sales service In addition to the mature brands, you also need to pay attention to the following points:
① Choose the volume. As mentioned before, the amount of hot water used by an adult in a shower is about 40-50L. Because solar energy is an unconventional energy source, it cannot produce hot water on rainy days, so you should choose a water heater with double daily water consumption to keep the hot water on sunny days and store it for use on rainy days. If there are two consecutive days, you can choose a photoelectric type to ensure that hot water is available all day and all year round.
② Pay attention to whether the building structure allows it, and choose products with appropriate functions and forms according to the building form.
③Because water heaters are often placed on the roof and have a certain pressure with the inside of the house. In summer, the temperature of hot water is high (up to about 90°C) and the outdoor ambient temperature is low, so it is best to use cross-linking. pipe or aluminum-plastic composite pipe or reinforced plastic hose. It has the characteristics of pressure resistance, high temperature resistance, low temperature resistance, non-toxic and tasteless, small heat capacity, small heat loss, and not easy to freeze in winter. Therefore, when purchasing, you also need to pay attention to whether the product has been pressure tested and leaked before leaving the factory, as well as the performance parameters.
④The material of the liner, the thickness of the liner and the thickness of the insulation layer determine the service life and insulation properties. The thickness of the liner is usually 0.6mm, and polyurethane foaming of the insulation layer is better, usually with a thickness of 4-5CM. Those in the northern region should note that the thickness should be 6CM or higher.
⑤The most important technical indicators are thermal efficiency >40 and heat loss coefficient <2°/meter. Remember to pay attention when purchasing.
3. Gas water heater
1. Little Bai Literacy
As the name suggests, the hot gas water heater uses gas as fuel and transfers heat to the flowing heat through combustion heating. A gas appliance that exchanges cold water for the purpose of preparing hot water.
The gas water heater is mainly composed of the valve body assembly, main burner, small fire burner, heat exchanger, safety device, etc. It also includes the flue of the flue water heater and the strong exhaust water heater. row device. The valve body assembly controls the working process of the entire water heater, which includes water valves, air valves, micro switches and igniters. When installing a water heater, valves should be installed on the water inlet pipe, water outlet pipe, and gas pipe.
Gas water heaters are divided according to their working methods: direct exhaust type, flue type, forced exhaust type, balanced type, outdoor type, direct exhaust type and flue type, which have been forced to be eliminated by the country due to safety issues. Not much to say, the forced exhaust type is the most commonly used form of gas water heater at present. The waste is forced to be discharged outdoors through a fan. However, it also poses safety risks when used in small indoor spaces. However, major manufacturers have now produced models with better performance and safety. A better balanced product.
Real pictures of common forced-discharge water heaters
Schematic diagram of the internal structure of common gas water heaters
2. Comparison of advantages and disadvantages
Advantages:
① Ready to use, no need to store water, long lasting burning time.
②The daily usage cost is lower than that of electric water heaters. The annual gas fee is about more than 500 yuan.
③Small in size, it saves more space than storage-type electric water heaters.
PS: The cost calculation method for gas water heaters and electric water heaters, if you find it boring, just skip it
The current natural gas fee is 2.2 yuan per cubic meter, and the electricity fee is 0.52 per kilowatt hour. Yuan. Since both are used for heating water, in terms of heat, the cost per kilowatt of natural gas is 0.22 yuan and that of electricity is 0.52 yuan per kilowatt. Therefore, the cost of using an electric water heater is 2 to 3 times that of a gas water heater. Assume that the family is a family of four, and each person uses 50L of bathing water. Calculated as 150L of hot water per day, the annual average usage is 54,500L. When the heating button rises from 15 degrees to 40 degrees, the temperature rises to 25 degrees.
Formula Q=54500L×(40℃-15℃)×4.2×10?3; J/(㎏·℃)= 5722.5MJ.
The price of natural gas per cubic meter: 2.2 yuan. The heat conversion rate of natural gas is 70, and the maximum heat amount per cubic meter of natural gas is Q=8500 kcal/cubic x70=5950 kcal/cubic;
1 kcal/1 kcal/1000 calories (kcal) = 4.1868 kilojoules (kJ). The actual combustion heat value per cubic meter of natural gas is approximately: 24.91146MJ.
The natural gas cost for a family of four: 229.7136×2.2 yuan≈505.36 yuan. The cost of an electric water heater is about 2.3 times that of a gas water heater. The cost of an electric water heater is: 367.54×2.5=1263.4 yuan
Disadvantages:
① A part of the cold water needs to be discharged from the remote water outlet (need to add circulation Pump solution, or the water heater comes with its own circulation pump, which is more expensive).
② When used indoors, the high temperature of combustion, exhaust gas and consumption of oxygen may become sources of danger, posing a risk of carbon monoxide poisoning. (Anti-CO alarm is now also considered a standard feature of balanced gas water heaters, and high-end products can even burn without producing CO)
③The temperature of hot water is affected by the water flow rate, water pressure, heat exchange efficiency, and gas flow rate Affected by many factors, the water temperature may be unstable. (The water volume server of the thermostatic water heater can solve the problem, and the temperature can be stabilized at a temperature difference of 0.5℃-1℃)
④The purchase cost of the machine itself is higher than that of the electric water heater.
3. Key points for purchasing a gas water heater
① Gas type
Before choosing a water heater, you must first determine what kind of gas is used in your home, because natural gas, coal gas, LPG gas tanks all correspond to different products or different types of nozzles. You can tell from the model of the gas water heater: "T" represents natural gas, "R" represents artificial gas, and "Y" represents liquefied gas.
②Capacity
Commonly used gas water heaters on the market include 10L, 11L, 12L, 13L, 16, 20L, etc. 10-13L is recommended for 1 bathroom and 1 kitchen, and 13L is recommended for 2 bathrooms and 1 kitchen. -16L liters, for 1 kitchen, 3 bathrooms (duplex building) or above, a water heater of 16L or above is recommended. Of course, Sumitomo who likes to take a bath should choose a larger than normal water heater, but it should be noted that the liter index of the water heater refers to the hot water production rate, that is, the number of liters of hot water that can be increased by 25°C per minute. Obviously, this indicator is also related to the water pressure of the municipal water inlet. If the water pressure itself is not enough, it is in vain to buy a large water heater with liters.
③Safety
Let’s do some literacy here. After all, life is at stake. Many people may have a misunderstanding about natural gas. They think that natural gas is not poisonous. In fact, this is not the case. , Methane is the main component of natural gas and biogas. Methane is basically non-toxic to humans, but when the concentration is too high, it will significantly reduce the oxygen content in the air and make people suffocate. When methane in the air reaches 25-30%, it can cause headaches, dizziness, fatigue, inability to concentrate, accelerated breathing and heartbeat, and ataxia. If you do not stay away in time, it can cause suffocation and death.
The main component of gas is CO. Carbon monoxide is familiar to everyone. The affinity between carbon monoxide and hemoglobin is 200 to 300 times higher than the affinity between oxygen and hemoglobin. Therefore, carbon monoxide can easily combine with hemoglobin to form carbon-oxygen. Hemoglobin loses its oxygen-carrying ability and function, causing tissue suffocation. It has toxic effects on tissue cells throughout the body, especially the cerebral cortex.
If there are three or two bedrooms, because the space is relatively large and well ventilated, the safety of a general forced-discharge water heater is guaranteed in the kitchen or balcony, mainly for small spaces such as one bedroom. , if the kitchen is very close to the bedroom, safety requires special consideration to choose a water heater with alarm detection.
(It is worth mentioning that Haier’s dual gas detection and alarm technology is a very reliable patent. It can monitor two gases. If the concentration exceeds the standard, it will alarm and then turn on the exhaust)
With CO security system Gas water heater
④Energy consumption
The energy consumption of gas water heaters is mainly electricity and gas. Ordinary gas water heaters are basically in the second level of energy consumption, only condensing gas The water heater can achieve first-level energy consumption. The main principle is simply to understand that it adds an additional first-level condensing heat exchanger to preheat cold water by absorbing high-temperature flue gas. This improves heat conversion efficiency and saves gas costs. Of course, the more functions, the higher the cost, and the greater the need for condensate drainage.
⑤Brand
Brand selection is definitely a topic that cannot be avoided. China’s mid-to-high-end market is basically monopolized by two Japanese brands, Rinnai and Nosori. Everyone knows this, and most of them When choosing electrical appliances, the principle is always to look at the brand first and see if it started in this category. Their products mainly feature Japanese original chips. In fact, their water heaters are probably all domestically produced, but some parts such as chips are imported. It is worth mentioning that these two major brands only provide a one-year warranty. LEON has always believed that electrical appliances such as water heaters are not high-tech products, and domestic brands such as Haier dare to guarantee for 6 or even 8 years. I believe that if the product is not good enough, it will not dare to boast, so whether to choose a domestic or foreign brand is a matter of opinion. Personally, I will pay due attention to domestic brands with R&D capabilities and patented technologies.
⑥Explanation of other patented technology terms
Phosphorus deoxidized copper heat exchanger: Compared with pure copper heat exchangers, the heat exchange rate is higher, and the phosphorus coating prevents oxidation.
Double solenoid proportional valve: precise control of gas proportion.
Blue flame technology: By precisely controlling the gas, a blue flame with higher energy efficiency is produced.
Memory metal: regulate water output by sensing water temperature. (Water temperature control accessory for low-end machines)
Water volume server: accurately controls the water volume according to the outlet water temperature. (More than 3,000 price)
Circulating pump: add a return pipe to the farthest hot water pipe, and use the circulating pump to circulate the hot water in the hot water pipe to achieve hotel-style zero cold water, of course It also takes time. (More high-end models)
Electromagnetic remote control: No wiring required, a control panel can be directly plugged into the socket to control the water heater temperature.
PS: The technologies of gas water heaters are various and easy to be confused. In fact, gas water heaters are the most common household appliances, such as intelligent temperature control for washing specific things, constant temperature accurate to 0.3°C, high liter count and high power, etc. They may all have superfluous functions, and the actual experience is completely insignificant, because the water pressure in many houses is limited. No matter how large the water heater is, the water output will still be the same, and it will not be able to use the full performance of the water heater. Therefore, LEON recommends buying a gas water heater or a better one. More consideration should be given to cost-effectiveness. Of course, if you talk about comfort and the financial ability, you will definitely go for a 0 cold water water heater.
Description of each component of the internal structure
By controlling the size of the fire row and the number of ignitions, different temperature requirements are controlled.
A schematic diagram of the water pipe wiring of a water heater with a circulation pump. If it has been renovated without a return pipe and you want to use this kind of water heater later, you can only connect a one-way valve to the cold water outlet at the farthest end to the hot water outlet. The water is returned to the water pipe, that is, after the hot water is output from the water heater, it goes to the farthest cold water pipe, and then returns water through the cold water pipe to the cold water inlet of the water heater. The disadvantage of this is that during the circulation process, all cold water faucets can release heat. For water, including toilets, using hot water managed by cold water will reduce the hot water effect. If someone takes a bath, it cannot be turned on at the same time.
The electromagnetic remote control used in Dream Renovation Home can adjust the water heater temperature from a distance. It may be useful in duplex rooms.
4. Air-source water heater
1. Novice literacy
Air-source water heater is also called "air source heat pump water heater".
The "air energy water heater" absorbs the low-temperature heat in the air, vaporizes it through the fluorine medium, then compresses it through the compressor and pressurizes it to heat up, and then converts it through the heat exchanger to heat the water. The compressed high-temperature heat energy is used to heat the water temperature. Air-source water heaters are highly efficient and energy-saving. They can produce the same amount of hot water that is 4-6 times that of ordinary electric water heaters. Its annual average thermal efficiency ratio is four times that of electric heating, and its energy efficiency is high.
This product overcomes the shortcomings of solar water heaters that rely on sunlight to collect heat and are inconvenient to install. Since the air-energy water heater works by exchanging heat through the medium, it does not require the electric heating element to be in direct contact with the water, which avoids the danger of electric water heater leakage, and also prevents the danger of explosion and poisoning of the gas water heater, and more effectively controls the gas Air pollution caused by exhaust gas emitted by water heaters. Air-source water heaters do not require sunlight, so they can be placed at home or outdoors. After the water stored in the solar water heater is used up, it is difficult to produce hot water immediately. If electric heating takes a long time, air-energy hot water can operate under pressure 24 hours a day and above minus 20 degrees Celsius. In this way, even if one box of water is used up, the air-energy water heater will produce another box of hot water in about an hour or even shorter.
At the same time, it can also fundamentally eliminate safety hazards such as electric water heater leakage, dry burning, and harmful gases produced when using gas water heaters. As the name suggests, air source heat pump water heaters transfer heat from the air to water through refrigerant. Traditional electric water heaters and gas water heaters obtain heat energy by consuming gas and electricity, while air-energy water heaters achieve the purpose of heating water by absorbing heat from the air. They can absorb about three times the amount of electricity while consuming the same amount of electricity. of thermal energy to heat water.
Real view of air-energy water heater
Schematic diagram of air-energy water heater and parameters of a certain brand
2. Comparison of advantages and disadvantages
Advantages:
p>① Compared with electric water heaters, it is energy-saving and environmentally friendly, and has higher energy efficiency.
② Compared with electric water heaters, the heating speed is faster.
③ Compared with the electric water heater leakage phenomenon and the gas leakage and exhaust gas pollution that may be caused by the gas water heater, it is safer and more environmentally friendly.
④ Larger water storage capacity, generally 150L or 200L optional.
Disadvantages:
①The large volume of the water storage tank plus the external machine takes up a lot of space.
②The water storage tank produces scale and needs to be cleaned regularly.
③The purchase cost of the machine is higher than that of the electric water heater (starting at 5,000).
④The product lineage and maturity are not as high as gas water heaters and electric water heaters.
Summary
Finally, based on the content of the above article, we will make an intuitive comparison of several parameters that must be looked at when buying a water heater.
Easy to install: electric water heater gt; gas water heater gt; air-energy water heater gt; solar water heater
Volume: air-energy water heater gt; solar water heater gt; electric water heater gt; gas water heater
Energy efficiency: air energy water heater gt; solar water heater gt; gas water heater gt; electric water heater
Save money: solar water heater gt; air energy water heater gt; gas water heater gt; electric water heater
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Cost: air energy water heater gt; gas water heater gt; electric water heater gt; solar water heater