Bathroom Extract Fans
In-line Duct Fans
Wall or Window Extract Fans
Heat Recovery Units
Whole House Extract Units
Acoustic Cabinet Fans
Roof Mounted Fans
Kitchen Extract Fans 
Kitchen Extract Hoods 
Comfort Cooling Range 
Heating
Humidifiers 
Air Treatment 
Hand and Hair Dryers 
Plate Mounted Axial Flow 
Cylindrical Cased Axial Flow Fans 
Centrifugal Direct Drive Fan 
Smoke Extract Fans 
Parking Ventilation 
Atex Fans for Explosive Hazardous 
Air Curtains 
Commercial and Industrial Ventilation
Heating Industrial Range 
Mounting Accesories 
Electrical Accessories
Backward curved centrifugal fans
High pressure centrifugal fans with backward curved impeller
High pressure centrifugal fans with forward curved impeller
Centrifugal fans with forward curved impeller
Double inlet centrifugal fans
Radial Centrifugal fans for transportation of materials
Centrifugal fans for furnace applications
Cylindrical cased axial fans
Bag filters to mount on MFL-F filter boxes.
Selection criteria
The information shown in the curves on the next page shows the relationship between the air flow that circulates through the filter box and the pressure drop generated by the filter in the initial operating conditions (clean filter).
When selecting the fan or ventilation unit associated with the filter box, it is essential to add a pressure margin designed to cover fouling of the filters. The value of this pressure depends on multiple factors such as the particle content of the outside environment, the hours of operation of the installation, sizing criteria and type of fan associated with the box.
We recommend that the pressure value used in the selection of the fan is between the following values:
- Maximum pressure drop of the filter: 300Pa (least energy efficient criterion).
- Half-life pressure of the filter: average value between the initial and maximum pressure drop (most energy efficient criterion).
Selection criteria
The information shown in the curves on the next page shows the relationship between the air flow that circulates through the filter box and the pressure drop generated by the filter in the initial operating conditions (clean filter).
When selecting the fan or ventilation unit associated with the filter box, it is essential to add a pressure margin designed to cover fouling of the filters. The value of this pressure depends on multiple factors such as the particle content of the outside environment, the hours of operation of the installation, sizing criteria and type of fan associated with the box.
We recommend that the pressure value used in the selection of the fan is between the following values:
- Maximum pressure drop of the filter: 300Pa (least energy efficient criterion).
- Half-life pressure of the filter: average value between the initial and maximum pressure drop (most energy efficient criterion).
