According to Zhongyikang's 2017 data, Haier's air energy water heater ranks first with a domestic market share of more than 40%. Relying on Haier Group's strong resource integration capabilities and R&D support, Haier, which only entered the field of air energy water heaters in 2011, has grown at a rapid rate for five consecutive years, leading the formulation of 6 relevant national standards and industry standards.
 
In terms of technology, Haier has many leading advantages, including thermal insulation technology that heats up once and keeps warm for 10 days, anti-electric wall technology with zero accident rate for 14 years, and ultra-low decibel sleeping silent technology.
 
Haier has partnered with Hitachi to launch the only product in China that uses CO2 as a refrigerant. The core of the air energy water heater is the heat pump compressor, and the refrigerant in the compressor often determines the coefficient of performance and heating temperature. More than 75% of the products on the market use Freon-based R22, and according to the Montreal Agreement, this environmentally harmful refrigerant will be completely phased out by 2020. High-end heat pumps of brands such as Gree, Midea, and Smith use environmentally friendly R410a and R134a refrigerants, but the heating effect is not much improved. Haier's CO2 refrigerant can heat the water heater to 80°C in severe cold weather, making it a must-use refrigerant for Japanese brands. Due to the high critical pressure, CO2 refrigerant has strict requirements for material strength and sealing connection, and the technical difficulty is extremely high.
 
Haier's air energy water heater products are relatively complete, including the entry-level Yueheng, Shushang, and Leshang series, the overall model of Tianmu smart and premium series, and the high-end Tianmu HERO and Tianmu KING series.
 
The entry-level model also uses traditional R22 refrigerant, and the heating effect of pure heat pump is only 55°C, and the energy efficiency level is 3. Among them, the Yueheng series is Haier's most basic air energy water heater, with two capacity options of 150L and 200L, and the price is 4500~5000 yuan. The product can remember the user's bathing habits for nearly a month, automatically heat in advance, and can choose night heating according to the local peak and valley electricity, further saving electricity costs. On this basis, the Leshang series has added a 2000W electric auxiliary heating function, which can increase the water temperature from 55°C to 75°C of the pure heat pump, but it will increase the power consumption to a certain extent. The price of this series is 5500~6500 yuan. In addition, Haier's sub-brand commander has also launched products with the same price as the Yueheng series, with lower energy consumption and reduced functions.
 
Air energy water heaters are divided into two categories: split type and integral type, and the split main unit and water tank are separated, similar to air conditioners, and are the most common air energy water heater products. The monolithic type combines the two into one, eliminating the separate outdoor host and reducing the energy loss of the pipe connection. The integral type can also be placed directly indoors to dehumidify the environment, and the integrated air energy water heater is mostly used in Europe and the United States. However, the disadvantage of the monolithic type is that the heating efficiency brought about by volume compression is not high, and the hot water output is small. As a result, the energy efficiency level of Haier's two integral products is low, Tianmu smart is level 5 energy consumption, and the premium series is level 3 energy consumption.
 
Tianmu smart is a wall-mounted design, which looks similar to an ordinary electric water heater. Since air-energy water heaters heat much slower than electric water heaters, once the stock of hot water is used up, hot water cannot be supplied for a long time. Therefore, the common air energy water heater is mostly 200L water storage capacity, the product capacity is only 80L, and the hot water output is only 12.5L/h, which often occurs when the water volume is exhausted, and it is not recommended as the main water heater for home life. The premium series is a relatively excellent integral air energy water heater design, with sufficient water volume of 200L, with electric auxiliary heating, enough to cope with common situations, and the price is about 9000 yuan.
 
The coefficient of performance is an important indicator of air energy water heater, which is almost equivalent to the power saving multiple. Tianmu King is Haier's flagship product, with a performance coefficient of up to 5.4, and the performance index is the pinnacle of all products on the market, much higher than the 4.2 of the Level 1 energy consumption standard. Due to the use of carbon dioxide refrigerant, the product can work normally at -25°C, and can adapt to the cold winter environment of northern cities. Heating up water to 80°C without the need for electricity-assisted heating produces almost 2.6 times more water than a normal heat pump. In addition, the multilayer heating technology can keep the water temperature constant, effectively avoiding hot and cold water temperatures. Tianmu King far surpasses its peers in all aspects, with a price of 46,000 yuan, which is suitable for large families with large water consumption.
 
In 2015, Haier launched a 10-year free repair service for all air energy water heater products, including free parts replacement and manual door-to-door costs, and the warranty period is much higher than the 6-year warranty of other brands. The process of installing an air energy water heater is far more complicated than that of an electric water heater, so it is recommended to reserve space for inlet and outlet pipes, 16A three-pin sockets and floor drains before installation. Air energy water heater products can only be served more high-quality and efficiently under reasonable installation, relatively speaking, the installers of big brands such as Haier are more serviceable and professional.