The fan is further provided with an outlet filter that has the same design as the filter fan but does not comprise a fan motor (16).

Said filter fan comprises at least one fan motor (16, 50) with fan blades and one filter (14) that is mounted upstream of the fan motor (16) in the flow of air.

A method and circuit for monitoring the useful life of a filter for a filter-fan product.

The use of a filterfan is therefore no longer possible.

The thermistor (RT1) is positioned in the airflow of the filter-fan device (12) adjacent to the air outlet.

An exhaust system includes a filter; and a fan downstream for the filter whereby activating the fan clears the filter.

The coupling member (14) couples the filter (12) with the fan (13) and transmits the vibration of the fan (13) to the filter (12).

The fan is further provided with an outlet filter that has the same design as the filter fan but does not comprise a fan motor (16).

A high efficiency exhaust filter (152) filters air from the blower.

The clean room comprises a ventilation outlet (102), a first fan filter unit (200), and a second fan filter unit (300).

The ventilator and the filter are built into the table.

A blower (28) is disposed downstream from the filter (26).

Each fan motor includes a fan and a motor.

The inlet assembly includes an air filter and a fan.

The roomside replaceable fan filter unit also includes a fan filter unit disposed in the interior volume between the air inlet and the filter receiving aperture.