More than ten years ago, the word "haze" appeared in the news media more frequently, most of the Chinese people's concept of air quality is limited to "good in the poor", not to mention PM 2.5 and other professional terms, in 2005, the air quality has not been widely concerned in 2005, Yuanda has been engaged in the development and production of fresh air fans, is one of the earliest enterprises to enter the field of fresh air in China, after more than ten years of precipitation, Yuanda has been recognized as a leading brand in the fresh air industry, its products cover commercial, civil and other scenarios, and won the award In addition, Yuanda is also the formulator of the new national standard of "Air Purification Device for Ventilation System".
 
Yuanda household fresh fan is divided into two types: wall-mounted and cabinet-type, of which the cabinet type fresh fan is the most recognized by the market, and it is also the flagship product of Yuanda, SC and SF series have been launched, each series has 250m³/h, 500m³/h and other air volume specifications are optional, the price is between 18000-25000 yuan, the purification principle and basic performance of the two are also highly consistent, SF belongs to the latest series, so the details are optimized more in place, standard DC inverter motor, The operating power is nearly 50% lower than that of SC models of the same specification; The one-door cabinet design makes the structure more compact and occupies significantly less space; In addition, the SF series has a larger built-in digital display, richer air indicators, and can be independently moved out and installed on any wall, which is undoubtedly a better user experience.
 
Although the Yuanda fresh air fan is cabinet in appearance, it can actually connect pipes to extend multiple air outlets, so as to achieve a central-level ventilation effect of the whole house, so that the fresh air supply in all parts of the room is more balanced. In addition to the details, the main difference between SC and SF lies in the return air design, the SC system has reserved a duct return air outlet, which can be set anywhere in the room, and the air circulation effect is smoother; The SF500 under the SF series is also equipped with this function due to its abundant space; However, SF250 and other models are limited by the internal space, and the bottom return air design is adopted, and the room far away from the host needs to rely on micro positive air pressure to squeeze the indoor dirty air out of the gap, and the air circulation effect is slightly inferior, but it is still better than the general direct air outlet mode.
 
Few manufacturers are so obsessed with electrostatic dust collection technology, and Yuanda is one of them. Electrostatic dust collection technology is the use of high-voltage metal plates to adsorb particulate matter, to achieve the purpose of purifying the air, but will release a certain amount of ozone, many consumers are concerned about this, and Yuanda's original current and voltage double constant patented technology, can stabilize the voltage control between the board at about 6000V, so as to achieve a perfect balance between the purification effect and ozone release, 6000V high voltage can also kill more than 99% of bacteria and viruses. According to the actual measurement of the instrument, the ozone emission of SC and SF series is only 0.02ppm, which is far lower than the international safety standard line of 0.1ppm, and the fresh fan can make the indoor and outdoor air circulate continuously, and the ozone will not be enriched indoors, so there is no need to worry too much.
 
Domestic haze pollution has the characteristics of large range and long duration, especially in the winter in the north, electrostatic dust collection technology is more practical to deal with this kind of air pollution, because the principle of electrostatic dust collection technology is adsorption, so the large cabinet fresh air fan only needs to clean the dust collection board regularly in daily use, and the maintenance cost is very low in the later stage. Yuanda believes that excellent filtration effect should not be based on frequent replacement of filters, and the most important thing is that users can afford it, which is also one of the original intentions of Yuanda to adhere to electrostatic dust collection technology for many years.
 
Of course, the PM2.5 removal rate of electrostatic technology is not as extreme as the HEPA filter, generally only 95%, so Yuanda is equipped with H13 HEPA filter at the end of the air duct of all models of SC and SF series to ensure that the PM2.5 of the air outlet meets the high-end acceptance requirements of zero. Since the electrostatic plate has borne most of the purification pressure, the HEPA filter at the end is only responsible for intercepting some "fish that leak through the net", and the service life is naturally greatly improved, Yuanda said that as long as the electrostatic plate is cleaned regularly, the replacement cycle of the HEPA filter can be up to 2 years.
 
In order to expand the applicability of SC and SF in different temperature environments, Yuanda is also equipped with sensible heat exchange modules, with a heating efficiency of more than 80% and a cooling efficiency of 77%, and the overall performance is at the first-class level in the industry. Heat exchange is of great significance for indoor temperature control and energy saving, if there is no heat exchange function, in the cold winter, the fresh air temperature is too low, the body feels very uncomfortable, and it will also cause a large loss of indoor heating; In the high temperature summer, it is tantamount to opening the window to blow the air conditioner, which greatly increases the cooling burden of the air conditioner, so the temperature regulation function of heat exchange "warm in winter and cool in summer" is quite necessary.
 
If users want to install a new fan in a small space such as a bedroom, the FE series under Yuanda is also worth paying attention to. FE series wall-mounted models on sale include FE5, FE6 and FE6 PRO, all of which use the highest H13 HEPA pure physical filtration system, of which FE5 has a fresh air volume of 180m³/h, which can meet the ventilation needs of 30 square meters of bedrooms, and the price is only about 2000 yuan, which is cost-effective, but has no heat exchange function; The fresh air volume of FE6 has decreased, but the built-in sensible heat exchanger with an efficiency of 60%, the independent air inlet and outlet brought by the dual-flow design, can form a circulating air path, significantly improve the indoor ventilation effect, the price of 3000 yuan is almost unmatched, and FE6 PRO The upgrade range is not large, on the basis of FE6, the remote control and WiFi control function are added, and the price is the same as 3000 yuan.
 
Installation service is also an important part of the field of fresh air, Yuanda offline services all over the country, in recent years, it is a "gold medal after-sales" slogan, in order to facilitate the purchase of online shopping enthusiasts, Yuanda also opened an official flagship store on the domestic e-commerce platform, it should be noted that the new fan involves offline installation services, it is recommended that consumers should fully communicate with merchants when buying online.