50mm Louvre Doors

For intake or extract air, the louvre doors are available in 50mm pitch or 75mm pitch blades and in single or double leaf.

Either with flanged frame or recessed frame, the louvre doors are robustly manufactured with optional threshold details.

Door furniture and ironmongery can generally be provided to suit specific needs and generally include optional mortice locks, door stays, panic push bars and handles.


From extruded aluminium sections, frame 5.0mm thick, blades 1.6mm thick. All frames are fully welded construction fitted as standard with rear galvanised steel bird mesh screen.

Euro profile cylinder mortice lock and stainless steel hinges with ball bearing washers are fitted as standard and plated brass shoot bolts are fitted as standard to one leaf of double doors.

Size and Weight

Generally to suit individual door openings or can be incorporated within large louvre sections.

Average weight: 20.0kg/m2.

Average free area: 40%.

Rain Defence

The 50mm & 75mm louvre systems have been tested by BSRIA to European standard EN13030:2002 and achieve Class C – (80 – 94.9 % effectiveness).

Airflow Performance

Tested to EN13030:2002 the following aerodynamic coefficient is achieved:

50mm Intake ~ 0.253.

75mm Intake ~ 0.258.


Matt black rear blanking panels

Insulated blanking panels (Thermal & Acoustic)


Insect screen (Fixed or Removable)

Panic bars, door stays, master keying, keypad locks, door closers, etc.

Spec with NBS Chorus
50mm louvre door
50mm Louvre Doors

Louvre range

Sand trap Louvre product image
Sand Trap Louvres

Sand Trap Louvres

The double row of vertically staggered blades trap the airborne particles which are evacuated via an integral drain-off chute to the atmosphere.