Model HL3-2A mixed-flow fan is used to ventilate in air conditioning engineering such as refrigeration, air conditioner, weave, vessel and civil buildings etc. PYHL-14A is used to discharge smoke and lower the temperature in tunnels, underground garages and metallurgy etc. It can help the fire fighters enter the disaster area to put off fire in time, so it is necessary for the fire control. Total Pressure: 44~3464Pa Volume of Flow: 444~140796 cubic meters per hour Machine No.: No.: 2.5A~No.14A, twenty-four specifications totally.