Recommended models: Q6, JT3, D6, ST5, Casarte PLS5 (U1)
 
Home appliance giant Haier has strong strength in the field of electric water heaters, not only has the largest water heater production base in Asia, but also ranks among the top two in the domestic market share for a long time. In 2002, Haier Electric Water Heater developed the "anti-electric wall" safety technology, which reduces the leakage voltage to below 12V by loading a resistor between the water heater and the human body to ensure the safety of use, and the technology was subsequently included in the national standard and IEC international safety standard. At least 7 out of every 10 best-selling electric water heaters in China are equipped with Haier's anti-electric wall technology.
 
In the field of electric water heaters, Haier has many patented technologies such as patented instantaneous hot washing, patented anti-electric wall 3.0, double-effect scale suppression, 3D-Max rapid heating, Smart-Time cloud wisdom, VCM color steel, etc., and has been well used in many high-end products. For example, Haier Cloud Smart Technology 2.0, because of the different habits of multiple family members, bath time, water temperature, and water volume are different, and each bath needs to be adjusted individually. The cloud Smart technology will set the intelligent mode according to the recognition judgment, and the water outlet will vary from person to person, eliminating manual operation.
 
Haier's scale suppression technology is also different from the mainstream scale removal technology of other brands, using the following two technologies: one is to use the scale control technology at the water inlet end to prevent the formation of scale, and the other is to maintain a low temperature state when the user is not in use to avoid high-temperature scaling, so that the scale can be reduced by at least 80%.
 
As Haier's flagship product, electric water heaters have dozens of series and models, with a rich choice. Among them, there are basic SN2 with mechanical control, R, R5, Q6 and other series with electronic control, GC, MTA, PT3 and other series with remote control, and ST5, JT3, D6 and other series with remote control by APP.
 
A wide range of products can be coarsely screened according to the model name. For example, Haier's basic EC6001-SN2, 60 in the model number represents the water heater volume. For example, 01 indicates single-power heating, 02 supports three-level power switchable heating, 03 indicates semi-gall layered heating with rapid heating of temporary water, and 05 indicates a 3D heating tube with more efficient heating. This simple single-power heating water heater is priced at around 1000 yuan, and the energy consumption level is level 2, which is not much different from the 20X1 series of Haier sub-brand commanders in all aspects of parameter functions, but the price of the 20X1 series is only 700-800 yuan.
 
Q6 series is a cost-effective choice of electric water heaters, the electronic button control is simple and convenient, and the price is about 1100 yuan. This series has a classic double-tube inverter speed thermal design, which can be freely switched between 800W, 1200W and 2000W. The most important thing for heating pipes is thermal conductivity, while limescale will greatly reduce the heat conduction efficiency. Haier's heating tubes use Ingley heating tubes with polished surfaces to minimize scale adhesion and maintain high heat transfer efficiency.
 
ST5 is a more mid-to-high-end electric water heater series, with a price of more than 2,600 yuan. The heating tube of the electric water heater has gone through five stages, from the first generation of single-tube heating, the second-generation submersible single-tube heating, the third-generation double-tube inverter heating, the fourth-generation layered alternating heating, to the most advanced 3D heating. The heat conduction process seems simple, but it is inseparable from the characteristics of the fluid, and the common half-gall heating is the fourth-generation layered heating principle, by starting the upper heating pipe, according to the principle of hot water floating and cold water falling, only the water above is heated, which greatly improves the heating efficiency. The ST5, on the other hand, uses a further 3D heating, and the heating tube is spiral-shaped, which greatly increases the contact area with water. However, this technology is a great test of the scale suppression ability and processing technology of the heating tube, and very few brands can cross the threshold of entering the process.
 
Haier's after-sales guarantee for electric water heaters is also a major advantage, most models promise 8 years of repair, including free inspection and replacement of magnesium rods, and some high-end models have a period of up to 10 years, which is unique in the industry. In addition to the Haier brand for the mid-end market, Haier also has a high-end sub-brand Casarte and an Internet sub-brand commander.
 
The commander is mainly customized by the Internet, and the design style is more personalized and young. The hot-selling ones are mainly mechanically controlled X1 series, electronically controlled Y2, WB5 series, and WeChat controlled CC series, and the price is generally between 700-1200 yuan. Among them, the CC series is a flagship model with more comprehensive functions, which can control the switch of the electric water heater through WeChat and make an appointment in advance, which is very suitable for young people to rent and buy. The CC model with a capacity of 60L is priced at 999 yuan, which is nearly 500 yuan cheaper than Haier's D6 and JT3 series with the same function. Commander has the same technical support and 8 years of after-sales service as Haier, and is very competitive in the low-end market. However, most of the commander's products have an energy consumption level of Level 2, which is more power-consuming than Haier's Level 1 energy consumption, which will increase daily electricity expenses.
 
Correspondingly, Casarte's products are few and fine, with two series: CA266 and PLS5. Among them, the PLS5 series has two capacity options, 40L and 50L, which seems to be a small amount of water, but the high power of 4-5 kW can bring 10 times the amount of hot water output, which is enough to meet the water consumption of a family of six. In addition, the product is equipped with the aforementioned cloud SMART 2.0 technology, which can automatically heat on demand according to the user's bathing habits. The price of the 50L PLS5 is about 8300 yuan, and it enjoys a 10-year warranty.
 
During Haier's warranty period, workers are exempted from door-to-door maintenance fees and spare parts costs, and there is also a service for replacing anode magnesium rods within eight years, and the after-sales guarantee is far better than that of foreign brands.