Fresh air ventilator model description Flow range 150~1300m3/h, suitable for home, as conference room, laboratory, Office, computer room, dining and fitness use. Installation easier Machines on the ceiling, do not occupy the indoor space, does not affect the interior decoration. Machines can also be installed upside down, more flexibility. Lower noise International fashion design, application of non-metallic materials, precision mold production, ensuring the perfect muted effect. More Besides General two-way ventilation, air purification, energy recovery and other basic functions, the inside of the machine by setting up special bypass systems.