Liaocheng Flextronics Ventilation Equipment Co. specializes in non-powered and non-powered natural ventilation fan and so on. No power ventilation function: 1, automatic extraction plants, heat and moisture, dust, odors, smoke, odor, chemical raw materials, such as housing, the air fresh, comfortable. 2, reduce indoor, warehouses, workshops or factories inside temperature of 2-3 degrees roof natural ventilation price to avoid the summer heat stress and irritable mood plant waterproof natural ventilation to reduce the impact of products or raw materials for high-temperature storage. 3, according to natural climate ventilators automatic operation, no power, saving energy and money. Family residential one-time investment of several decades Bai yuan can enjoy the comfort, factories, warehouses investment installation can save a lot of power consumption, and the effect is significant Liaocheng Flextronics Ventilation Equipment Co. specializes in non-powered and non-powered natural ventilation fan and so on. Teach you without power ventilation measurement is the use of so-called measuring instruments or work it to the side of a given size of a physical quantity by a certain method. As measured by liquid column manometer pressure ventilators, centrifugal ventilators tachometer measuring speed. Measurement methods can generally be divided into two categories: 1. Those who can directly measure read directly from the ventilation test instrument parameters measured by the size of the measurement of the most natural ventilation, which are direct measurements. Such instruments are sometimes called direct-type instrument. Such as direct measurement using a mercury thermometer fan gas temperature. 2. Indirect measured by a certain function in terms of the size of the desired measurement parameter measurement, called the indirect side interaction. Such as when the ventilation flow, after the first read out by the Pitot tube numerical hydrodynamic its size, and then converted into ventilation flow size. wzt roof natural ventilation | Flextronics ventilators (certified) | Fujian natural ventilation by Liaocheng Flextronics ventilation equipment Limited. Liaocheng Flextronics Ventilation Equipment Co. (www.lcwctf.com) (www.lcwctf.com) is an industry leader in Shandong Liaocheng, 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. Flextronics ventilators in leadership with the staff warmly welcome all inquiries negotiations to create Flextronics ventilation a better future. You can also access (www.lcwctf.com/supply_details_48394835.html), for more information about the company.