Recommended series: E3, E4, F4, D2C series
 
Nearly 100% of Japanese households are equipped with water heaters, of which more than 96% of users use gas water heaters, and the energy rate occupies half of this huge market, and the market share remains around 40% all year round.
 
The world's first thermostatic gas water heater was born in Kobe in 1951 and is currently Japan's largest water heater and warmer company. In 1993, Nengli set up a wholly-owned company in China, and maintained a leading position in the domestic gas water heater market in terms of sales volume and sales, and was a representative of high-end gas water heaters.
 
For example, the energy gas water heaters are equipped with original sensors from Japan, which judge the amount of water and gas at a very high frequency, and make efficient adjustments according to environmental changes in time, which is better than first-class brands such as Rinnai. In addition, Nengsu has nearly 5,000 patents, including patented metal burners, windproof and rainproof smoke exhaust pipes and other practical technologies.
 
The energy rate product series is extremely rich, including the basic A3, E3, F3 and TAG3 series, the E4 and F4 upgrade series equipped with water servos, the high-efficiency and energy-saving condensing D2C series, the 40W series installed outdoors, and the high-end D2Q series that is ready to heat when it is turned on. In addition, there are many models imported from Japan.
 
The E3 series is affordable and the best-selling product, with four water output options: 11L, 12L, 13L, and 16L. Different water output is suitable for different family environments, generally a family with one kitchen and one bathroom can choose 13L water output, the price is about 2800 yuan. The series has a temperature sensing device at the water inlet and outlet, which can monitor the situation of the water inlet and outlet in real time, and feedback to the CPU to adjust the water volume and gas volume in time to ensure that the water temperature is constant. Although the E3 series is the basic model of energy rate, it has many functions such as anti-freeze function, low water pressure start-up, boot safety self-check, CO monitoring, etc., and even better than the high-end models of other brands.
 
The advanced model F4 series, which was launched in 2017, has put more effort into the detailed experience, with the water temperature difference accurately controlled at ±0.5°C, and the water volume server has been added intimately, effectively solving the pain point of large changes in water temperature after water is stopped during bathing. This model also uses Nengsu's unique micro-flame combustion technology to provide comfortable warm water at 32°C in summer, avoiding the summer dilemma of hot water being too hot and cold water too cold. In terms of quietness, a number of optimizations have also been made, reducing the noise level of the E series from 60 decibels to 50 decibels. The 16-liter F4 series products are priced at about 5,000 yuan.
 
The condensing model is a high-efficiency and energy-saving gas water heater. The condensing product makes full use of the waste heat of the exhaust gas to preheat the cold water, which greatly improves the thermal efficiency of hot water. At present, the state divides the energy efficiency level of gas water heaters into three grades, and the first-level energy efficiency and thermal efficiency need to be more than 96%, and only condensing products can meet this standard. The secondary energy efficiency is more than 88%, and the vast majority of products on the market are secondary energy efficiency. In today's rising gas costs, condensing water heaters can save a lot of gas costs every year, and at the same time, lower heat generation can also reduce the loss of internal components of the machine to a certain extent, and prolong the service life of the product. The D2C series is a representative of condensing products, but the price is slightly higher, more than 30% higher than the price of products with the same function.
 
After-sales service has always been the weak point of foreign-funded enterprises, and the rate is often criticized because of the slow maintenance cycle and poor service attitude. It is recommended to purchase through a large e-commerce platform and connect with the third-party after-sales service of the platform to ensure high-quality and timely service in the later stage.
 
    ※The rate of the rate of the rate, the pronunciation should be the rate of efficiency, not the rate of leadership, according to the Japanese katakana ノーリツ translation.