EN 1366-2 Fire resistance tests for service installations – Part 2: Fire dampers

This European Standard specifies a method for evaluating the fire resistance of fire dampers installed in fire separating elements designed to withstand heat and the passage of fire, smoke and gases at high temperature. It is used in conjunction with EN 1363-1.

This test is performed to evaluate the ability of a fire damper to prevent fire and smoke spreading from one fire compartment to another through the air ductwork system which may penetrate fire separating walls and floors. 

This standard is not suitable for testing fire dampers in suspended ceilings.

Test specimen

For the fire test, the maximum size of fire damper product family shall be tested. For the determination of leakage at ambient temperature test, both the smallest and the largest size fire damper shall be tested. 

Number of tests

The number of necessary tests depends on several factors;
• supporting construction,
• method of installation in the supporting construction,
• method of installation on to the supporting construction,
• method of installation away from the supporting construction,
• variations of fixings and accessories.


This can result in a large amount of combinations of supporting structures, installation methods, etc., leading to complex test setups and/or series. 


Careful consideration of the direct and extended field of application standards (DIAP/EXAP) may reduce the number of tests required. Before starting a test program RISE recommends performing a pre-studie in order to create an optimal test serie.

The test will be performed in four steps

Determination of leakage of connecting duct and measuring station

The joints in the construction are improved until the leakage criterion can be met.

Opening and closing test
After 50 opening and closing cycles the ventilator shall show no mechanical damage that will affect its operation.

Determination of leakage at ambient temperature
Where required to meet the S classification, this test shall be carried out on the largest and smallest fire damper size. At an underpressure in the connecting duct the pressure differential across the orifice plate.

Fire test procedure
The fire test will be performed according to EN 1363-1 Fire resistance tests – Part 1: General Requirements and EN 1366-2 FIRE restistance tests for service installations - Part 2: Fire dampers.

The fire damper is installed, to a fire separating element in a manner representative of practice. Tests are executed starting with the fire damper in opened position to expose the temperature sensing element of the fire damper to furnace environments.

The exhaust fan system shall produce an air velocity of 0,15 m/s across the fire damper opening. The damper shall close during the first 2 min of the test when the under pressure inside the connecting duct increases.  

The performance of the fire dampers can be classified according to EN 13501-3. We also perform factory production control and issue certificates for CE-marking.


Would you like to find out more about this test? Please contact us!


Related Information

See also

Fire resistance testingEN 1363-1 Fire resistance tests –Part 1: General Requirements

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Mikael Ragneheim

Phone: +46 10 516 56 44

Patrik Johansson

Phone: +46 10 516 50 92

RISE Research Institutes of Sweden, Phone 010-516 50 00, E-mail info@ri.se

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