Pressure blowers and fans that are designed to exhaust smoke are also available ... There are three choices for design configuration: axial, bi-lobal or tri-lobal, and centrifugal. There are two drive ...
Air Handling Units / HVAC Air Handling Units and HVAC (Heating, Ventilating and Air Conditioning) systems incorporate fans, such as plenum fans and duct fans, to move air in buildings and enclosed ...