Offering a ventilation rate of 500m3/hr (metres cubed per hour) or 138L/s (litres per second), the Manrose MF150S is designed for use in large domestic bathrooms or those that experience heavy load. Using 'Mixed Flow' (MF) technology, it combines the air flow characteristics of a 150mm (6 inch) axial impeller with a centrifugal housing, resulting in very high extraction rates and much higher exhaust pressures. This means that the MF150S can cope with much longer duct runs than a standard axial fan without significant loss of power.
The MF150S is particularly great for bathrooms as the internal grille may be sited directly above the shower or bath, thus extracting steam at source. With no electrics in the bathroom it is easy to install, saving both electrician and decorating costs and since it is situated in the loft or ceiling void noise levels are also extremely low.
An inline fan is installed in the loft or ceiling void above the bathroom (or kitchen etc). Ducting is attached to each end of the fan with one length going to an internal grille in the ceiling of the bathroom and the other going to a grille on the external wall, soffitt or roof.
Duct clamps are used to connect the ducting to each end of the fan and to the spigot of each of the grilles. The back draught shutter may be installed anywhere in the exhaust ducting - that is to say, the ducting which runs from the fan to the outside grille, but is usually situated as near to the outside grille as possible. It's worth pointing out, that the backdraught shutter must be fitted the right way round!
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