MFQ - Quadra Mixed Flow Inline Fan



The square mixed flow range has been specially designed for systems with high performance and low sound levels in mind. Ideal for commercial and industrial premises. The MFQ range places the emphasis on fast installation, reliable performance and easy access for maintenance.

The range offers almost two and a half times the pressure development of conventional axial fans and is an ideal cost effective alternative to two stage axial arrangements. The range is dimensionally compact, saving weight and installation costs.

Available in five sizes with a duty range from 0.632m³/s to 3.673m³/s (2275m³/h to 13,222m³/h), develops pressures up to 550 Pa.

Mixed Flow Impeller & Casing

The models 350 to 450 size have high efficiency backward curved mixed flow impellers manufactured in moulded polyamide. All other sizes of impeller are constructed in aluminium. All impellers offer non-overloading characteristics and are dynamically balanced for maximum efficiency. The casing is manufactured in sheet steel with Ductmate flanges at both ends.

The full range of MFQ fans is also available, finished with optional C.R.P. (Chlorinated Rubber Paint), ensuring the unit is fully weatherproofed and suitable for external mounting. All weatherproofed units are manufactured to order. Note the standard product codes are suffixed with ‘WP’ eg MFQ350/4/1WP.


A proven rotor motor and mixed flow impeller assembly has been specially selected for its performance and non-overloading characteristics. The assembly is dynamically balanced to VDI 2060. The motors in this range are rated at IP44 according to BS EN 60529. Ball bearings are greased for life and are designed to run at any angle.Insulation is Class B (from -30°C to +40°C).

3 Phase units, sizes 400 to 560 have 2 speed pole change DELTA/STAR connection motors as standard.


Single phase 220-240V 50 Hz. Capacitor start and run. Three phase 380-415V 50Hz. A service switch is supplied with all models with 20mm entry. Capacitors are located in the switch compartment. All motors are fitted with Standard Thermal Overload Protection (S.T.O.P.). Most models are available with 4 and 6 pole motors.


Unit A B C D E F G H Weight kg
350 400 450 25 52 406 62 29 345 22
400 450 500 25 52 456 62 29 370 28
450 485 550 35 52 491 62 29 405 42
500 510 650 35 86 516 102 37 455 73
560 530 700 35 52 536 102 37 480 78


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