You can select a Certification Programme from the list below to retrieve its description (scope of the programme, definitions...)


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Scope of the programme

The programme scope covers rigid and semi-rigid ventilation ductwork systems divided into the following sub-programmes:

- Rigid metallic ductwork systems with circular cross-section (DUCT-MC);
- Rigid metallic ductwork systems with rectangular cross-section (DUCT-MR);
- Semi-rigid non-metallic ductwork systems predominantly made of plastics (DUCT-P);

Each sub-programme applies to ductwork systems fitted with integrated sealing solution as described in relevant Rating Standard.

All ranges of products that fall into the relevant sub-programme scope and are promoted by the Applicant/Participant shall be certified. The “certify-all” principle applies not only to Europe but to all markets.

The DUCT programme does not cover other types of ventilation ductwork elements like flexible ducts, double-wall ductwork or ductwork made of insulation ductboards.

Principle of the programme

The certification programme is based on product performance testing by independent testing laboratories as well as production sites auditing.


Air leakage limit

The air leakage limit (fmax) is the maximum permitted leakage factor for the ductwork according to its air tightness class defined as per the ductwork classification.

Air tightness class

The air tightness classes A to D are defined as per the ductwork classification that appear in standards: EN 12237:2003 and EN 1507:2006.

Design operating pressure

Maximum static pressure difference pdesign (Pa) for which the installed ductwork is designed to operate under normal conditions.

Ductwork system

The ductwork system refers to the assembly of the ducts and fittings of an HVAC (Heating, Ventilation and Air-Conditioning) installation that are used to supply the air to or extract the air from the conditioned spaces.

It does not include components such as air handlers, heat recovery units, air terminal devices, coils.


Integrated/additional sealing solution

In the present document a sealing solution is referred to as “integrated” when it is supplied in each delivery as an integral part of the sealing solution or factory installed.  

On the contrary, a sealing solution is said “additional” when applied on the construction/application/installation site.

See relevant Rating Standard for detailed list of integrated/additional sealing solutions.

Minimum and maximum service temperatures

Respectively lowest and highest temperature at which the ducts and fittings, when installed, continue to function within specified limits of performance.


Refer to relevant Rating Standard.

Resistance to external pressure

The resistance to external pressure value is given as the force F that is the maximum allowed force received to reach a duct height deformation of 3 mm. The value shall be rounded down to the nearest ten.

Rigid/semi-rigid/flexible ductwork

The definitions for rigid/semi-rigid and flexible ductwork that are stated in standard EN 12792:2003 apply.

Static gauge pressure limit

Maximum design operating pressure ps (Pa) for the ductwork according to its air tightness class.

Typical ductwork system

When a ductwork system is set up in compliance with the requirements specified in the relevant Rating Standard it is then considered representative of the range to be certified and referred to as “typical ductwork system”.

Testing requirements

Test standard

Air leakage tests shall be conducted in accordance with EN 12237:2003 (DUCT-MC and DUCT-P) or EN 1507:2006 (DUCT-MR).

For tests related to service temperatures and resistance to external pressure (DUCT-P) the method is described in Rating Standard RS 2/C/004P-2016.

Particular specifications for testing

Tests will be conducted on typical ductwork system(s). The typical ductwork system(s) will be defined by ECC for each sub-programme so that the tested objects are predominantly the same.

Particular specifications shall be applied during the test according to applicable Rating Standard.

All tests will be performed by the personnel of independent laboratory(ies) selected by Eurovent Certita Certification. When the product ranges comprise large (“size L”, see definition in relevant Rating Standards) items the test will be conducted in turn at the independent laboratory(ies) facility and at the production facility. Otherwise tests will be conducted in the independent laboratory(ies) facility.

Certified performance items and associated tolerances

When tested by the independent laboratory personnel, the obtained results shall not differ from the claimed values. The tolerances with respect to the declared ratings are the following:

Air tightness class (all):                                               as claimed or better

Positive and negative pressure limits (all):                     as claimed (no tolerance)

Dimensions (DUCT-MC):                                              as per EN 1506:2007

Dimensions (DUCT-MR):                                               as per EN 1505:1998

Maximum service temperature (DUCT-P):                       as claimed (no tolerance)

Minimum service temperature (DUCT-P):                        as claimed (no tolerance)

Resistance to external pressure (DUCT-P):                      ±10%

General Reference documents

Certification Manual 14th (December 2017)
Reference documents