However, the above may not always resolve your air pressure issues, and there may be other factors at play. These may include:

• Excessive smoke seals
• Poorly designed keeps and latches
• Incorrectly fitted door closer with no pretension on the armset
• Wind vortex within high-rise buildings

For further support please contact our technical support team today by calling +44 (0)1246 261491 or using our web chat function.

Little finger check

Just like the sail on a boat, a door catches any draft passing through a building. Wind movement around a building can cause positive or negative air pressures.

Here’s an easy way to check if there might be an air pressure problem causing door closing issues.

It should be easy to close a fire door with the push of your little finger. To test this, disconnect the door closer arm. If you can’t close the door with your little finger, then don’t expect a closer be able to close the door. A door not closing can indicate that the pressure difference is too high, or other self-closing saboteurs (such as the design of the latch and keep, or joinery) requires remedial work.

In situations where there is a very high difference in air pressures, or excessive door width and weight, an automatic closer may be required as a more reliable solution.may