Can Fire Door Hardware Be Used Interchangeably Across All Fire Doors?

Short answer: No.
Just because a piece of hardware has been tested on one fire door system does not mean it is suitable for use on any fire door. Fire doors are complex, tested systems — and swapping components without verification can lead to non-compliance, inspection failures, and safety risks.

Why Hardware Can’t Be Universally Used on All Fire Doors

Here are four key reasons why fire door hardware must be system-specific:

1. Fire Door Testing Regulations

Fire doors are tested and certified as a complete assembly, including:

• Door leaf

• Frame

• Intumescent seals

• Glazing (if any)

• Hinges, closers, locks, handles, and other hardware

Each of these components contributes to the overall fire resistance rating. For example, a fire door tested with a composite core and steel frame behaves very differently in a fire than one with a timber core and timber frame — even if they use the same hardware.

2. Installation Requirements Vary by Manufacturer

Different door manufacturers have specific installation guidelines based on how their fire doors were tested.

For instance:

• Some require intumescent pads or seals with hardware

• Others do not

Ignoring these differences can compromise performance and void certification.

3. Hardware Cut-Outs Affect Fire Integrity

Every cut-out made in a fire door — whether for a lock, hinge, or viewer — affects its structural integrity.

If the hardware hasn’t been tested as part of that specific door system, its installation could:

• Weaken the door

• Compromise fire resistance

• Render the door non-compliant

4. Risk of Failing Fire Door Inspections

Using unapproved hardware can cause the door to fail fire safety inspections. If a fire door doesn’t match its manufacturer’s list of certified components, you may face:

• Costly replacements

• Project delays

• Legal or insurance issues

Conclusion: Fire Doors Are Tested Systems — Don’t Mix and Match

To stay compliant and protect lives:

• Only use hardware that is tested and approved by the door manufacturer

• Follow the exact installation instructions and approved hardware list

• Don’t assume that “fire-rated hardware” is universally compatible

Learn more about Hardware on Fire Doors:

Can I fit any hardware to my Fire Door?

Do you need a drop seal to make a fire door compliant?

Is it true that a deadbolt can’t be fitted to a fire door?