When using dual-position control, due to the fully open position humidifier only function fully closed, or if the humidity sensor located on the air tube, once full of fresh air humidifier unit specifications, the sensor will immediately detect the humidity is higher than the set values ??require off valve (because the maximum amount of humidification humidifier is usually higher than the design requirements of the inevitable choice of value); and once closed, they will immediately detect humidity sensor is below the set value and asked to open the humidifier, which will inevitably lead to running oscillation humidifier valve moves frequently, and shorten life. Obviously, this phenomenon is due out from inside the duct humidifier to range capacity is too small due to the wet. Therefore, when using digital control the steam humidifier, humidity sensor should be provided in a typical room (zone) or changes in relative humidity more gentle position, to increase the wet volume capacity, to prevent too frequent switching operation of the humidifier valve damage. The new air unit framework: Horizontal fresh air unit all aluminum frame structure of the new air unit Carrier, frame made of high-strength aluminum special profiles, each corner of the frame structure with special castings, profiles and connection angle plug-structure, which kind of structure has the following characteristics: A: Good mechanical strength, light weight new air handling units, corrosion resistance, appearance of new air conditioning units, and the size accurately. B: structural assembly and flexible, easy-to-spot disassembly, maintenance, and longer service life than steel frame. New air handling units Carrier, Rui Xincheng air conditioning (certified), Baotou new air handling units provided by Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.