Recommended series: D6, D8, N3L, N3H
 
A.O. Smith is an American manufacturer of commercial hot water equipment and boilers, entered the Chinese market in 1998, and ranks among the top five in the national gas water heater sales share. However, gas water heaters are not A.O. Smith's strong point, and A.O. Smith is rarely seen on many European and American gas water heater evaluation networks.
 
It must be noted here that most of A.O. Smith's products use stainless steel as a heat exchanger, and claims that stainless steel is superior. However, the thermal conductivity of oxygen-free copper heat exchanger is about 350W/(mK), while that of stainless steel is only 16W/(mK), and the thermal conductivity of stainless steel is extremely poor, which cannot be compensated for by improving the heat exchanger area. And the data cited by Smith are compared with copper heat exchangers, rather than the common oxygen-free copper and deoxidized copper heat exchangers on the market, which is not reasonable, and the oxygen-free copper heat exchanger has a strong corrosion resistance and can be used for more than 10 years. Moreover, copper can effectively inhibit bacteria, and the material is easy to recycle after scrapping. The cost of oxygen-free copper materials is about 4-50,000 yuan/ton, much higher than that of stainless steel 1-20,000 yuan/ton, and stainless steel is not an ideal heat exchanger material in all aspects.
 
However, the Smith gas water heater is ahead of other brands in the carbon monoxide safety protection system, in addition to being equipped with active protection such as real-time monitoring and alarm, it also adds carbon monoxide strong emission technology, when the combustion is not sufficient, it will increase the air volume in time to promote the forced discharge of carbon monoxide, and the safety is higher.
 
The main product lines include the constant temperature classic VD0 series, the anti-freeze version VDA1 series, the digital display version VDG series, and the high wind resistance version N3H series. Under the same specification of products, the price of Smith gas water heater is much higher than that of other brands.
 
The VD0 series is one of the few models from A.O. Smith that uses phosphorus deoxidized copper exchanger material. The product price of 13L water output is about 2900 yuan, which performs well in the basic protection. The product adopts double-sided glue filling computer board, which can effectively prevent moisture and insects. And with anti-freeze heating rod and high-performance windproof hood double anti-freeze technology, effectively prevent the water tank from freezing and cracking.
 
The N3H series has added high wind pressure technology, and the price of 16 elevations is close to 7000 yuan. Since the strong exhaust gas water heater needs to discharge the exhaust gas to the outside, once the outdoor wind is strong, it is easy to have the dangerous situation that the exhaust gas backs up indoors. For families with strong winds in high-rise floors or frequent typhoons in the south, it is recommended to choose a gas water heater with a similar wind resistance function to avoid danger. Smith's JSQ33-N3H is equipped with a high-rise wind resistance function, which is enough to cope with the harsh environment under a category 12 typhoon. This model also has WIFI smart connection technology, which can remotely set the temperature on the mobile phone, monitor abnormalities, and remotely control the water heater in the bathroom.
 
A.O. Smith is extremely good at durable details, with a large capacity and a higher price tag, making it an alternative to a gas water heater for large families.