Door Manufacturer in China for Global Projects
For exterior door buyers, developers and building contractors, the phrase “EN 14351 three-performance CE certification” frequently appears in quotations and supplier documents.
It normally refers to three important performance characteristics:
However, this expression can also create confusion.
The three tests themselves are not an independent type of CE certificate. They are performance assessments carried out within the framework of EN 14351-1, the European product standard covering windows and external pedestrian doorsets without resistance to fire and/or smoke leakage characteristics.
Understanding this distinction is essential when comparing door manufacturers, reviewing test reports or deciding whether a supplier’s CE documentation is suitable for a European project.
EN 14351-1 is the harmonised European product standard commonly applied to windows and external pedestrian doorsets.
For an exterior steel door, aluminium door or other pedestrian entrance doorset placed on the European market, the standard provides a common framework for assessing and declaring relevant product performance.
CE marking under the Construction Products Regulation does not mean that a product is simply “approved” in a general sense. It means that the manufacturer has assessed the product according to the applicable harmonised technical specification and has declared its performance through a Declaration of Performance, or DoP.
The European Commission describes the Construction Products Regulation as a common technical language that allows professionals, authorities and customers to compare the declared performance of construction products from different manufacturers.
This means that buyers should not stop at seeing a CE logo. They should examine exactly what performance has been declared, which product configuration was tested and whether the supporting evidence covers the door they intend to purchase.
In the door and window industry, “three performance characteristics” usually refers to the product’s ability to control air leakage, resist water penetration and withstand wind pressure.
These characteristics are particularly relevant to exterior doors installed in residential buildings, hotels, offices, hospitals, schools and other buildings exposed to outdoor weather.
Air permeability evaluates how much air passes through a closed doorset under specified pressure differences.
The performance is closely related to:
A higher declared class generally indicates better control of unintended air leakage under the test conditions.
For building owners, air permeability affects indoor comfort, energy efficiency, dust control and pressure stability. In air-conditioned buildings, excessive leakage may increase cooling or heating demand.
The classification is commonly expressed according to EN 12207, while the laboratory test method is generally based on EN 1026.
A report should clearly identify the achieved classification and not merely state that the product “passed” the test.
Watertightness evaluates whether water penetrates through the doorset while the specimen is exposed to controlled water spraying and increasing pressure.
The result depends not only on the door leaf but also on the complete system, including:
Watertightness is particularly important for doors installed in exposed façades, coastal regions, tropical climates and buildings subject to wind-driven rain.
Classification is commonly declared according to EN 12208, with testing generally carried out according to EN 1027.
A buyer should check whether the test specimen used a raised threshold, flush threshold or no threshold. A door tested with a high weather-resistant threshold may not provide the same performance after being changed to a low accessibility threshold.
Resistance to wind load assesses how the doorset behaves under positive and negative pressure.
The test considers factors such as:
Classification is commonly expressed according to EN 12210, while EN 12211 is generally used as the test method.
Wind resistance is especially important for high-rise buildings, coastal projects, exposed façades and large door sizes.
A result obtained from a small single-leaf specimen cannot automatically be applied to every larger, wider or double-leaf door configuration. The permitted product range must be justified through the standard’s rules, technical assessment or documented extended application principles.
Not necessarily.
A laboratory may issue a test report covering air permeability, watertightness and resistance to wind load. That report is valuable technical evidence, but it is not automatically equivalent to a complete CE compliance package.
For construction products covered by a harmonised standard, the manufacturer is responsible for drawing up the Declaration of Performance and affixing the CE marking in accordance with the applicable regulatory requirements.
A proper documentation package may include:
Therefore, buyers should distinguish between four different documents.
A test report records how a specific specimen performed under specified laboratory conditions.
It normally includes the specimen dimensions, materials, hardware, seals, threshold, opening direction, test pressure and classification.
A classification report converts test results into a recognised performance class according to the relevant classification standard.
A certificate may be issued where the applicable Assessment and Verification of Constancy of Performance system requires certification-body involvement.
However, the presence or absence of a certificate depends on the product, intended use, essential characteristic and applicable AVCP system. Buyers should not assume that every EN 14351-1 exterior door must have the same type of third-party product certificate.
The Declaration of Performance is issued by the manufacturer. It identifies the product type, intended use, applicable harmonised standard and declared essential characteristics.
The European Commission identifies the DoP as a central part of the CPR framework for products covered by harmonised standards.
These terms are often mixed together, but they do not mean the same thing.
A testing laboratory performs physical testing such as air leakage, water penetration and wind pressure testing.
Its competence should cover the specific test methods used in the report.
A product certification body performs certification activities where the applicable conformity-assessment system requires such involvement.
A body may be authorised for certification activities but not necessarily for every door standard or every characteristic.
A notified body is an organisation formally designated by an eligible national authority and notified to the European Commission for specific legislation, product areas, standards, functions and assessment tasks.
The European Commission maintains the official NANDO and Single Market Compliance Space records for notified bodies working under the Construction Products Regulation.
The critical point is that notified-body status is scope-specific.
An organisation may be a legitimate notified body for cement, insulation or structural steel but have no notified scope for EN 14351-1 doors and windows.
Therefore, checking only the organisation’s name or four-digit notified-body number is not enough.
Not automatically.
Large international organisations often have advantages such as:
Smaller specialised laboratories may also offer strong technical competence, faster communication and deep experience in a particular product category.
Under the CE system, there is no official ranking that divides notified bodies into “large, high-level institutions” and “small, low-level institutions.”
The decisive questions are:
A famous brand name cannot compensate for an incorrect scope. Likewise, a lesser-known European laboratory should not be rejected merely because it is unfamiliar to an overseas buyer.
Look at the title carefully.
Does it say:
These documents have different legal and technical functions.
A supplier describing every laboratory report as a “CE certificate” is a warning sign.
The document should clearly identify the applicable standard, such as EN 14351-1, together with the relevant amendment or edition.
It should also identify the individual test and classification standards used for air, water and wind performance.
Be cautious when:
For a document claiming notified-body involvement, search the organisation in the European Commission’s official notified-body database.
Check:
Official notification records can list EN 14351-1 and indicate whether the organisation is notified as a testing laboratory, product certification body or for another function.
Do not rely only on a logo printed on the report.
This is the most important step.
The body’s scope should match:
A body notified only for EN 16034 fire-resistant doors cannot automatically use that scope to support EN 14351-1 weather-performance assessment.
Conversely, an EN 14351-1 test report does not establish fire resistance or smoke-control performance under EN 16034.
Notification and accreditation are related but not identical concepts.
Where available, review the organisation’s accreditation certificate and annex. The annex should list the test methods or certification activities within its accredited scope.
For three-performance testing, look for the relevant air, water and wind test standards rather than a general statement such as “building material testing.”
Use the laboratory’s official website, report-verification system or published contact details.
Provide:
Avoid verifying a document only through an email address supplied by the manufacturer. The email domain and contact details should match the organisation’s official records.
A genuine report can still be misused.
Compare the report with the offered product in terms of:
If the tested specimen is materially different, the declared performance may not apply.
The company named in the report should be connected to the supplier and product.
Watch for reports issued to:
If the supplier uses shared test results, cascading arrangements or transferred technical documentation, it should provide a valid legal and technical basis for doing so.
Buyers should investigate further when they find any of the following:
EN 14351-1 primarily addresses performance characteristics of windows and external pedestrian doorsets that are not covered as fire-resisting or smoke-control products under that standard alone.
Where an external pedestrian doorset also requires fire-resistance and/or smoke-control performance, EN 16034 becomes relevant alongside the appropriate product standard.
This normally means that a fire-rated exterior door may require documentation addressing both its external-door characteristics and its fire or smoke performance.
An EN 14351-1 air, water and wind report cannot prove:
Similarly, an EN 16034 fire-door certificate does not automatically demonstrate high watertightness or low air leakage.
No.
CE marking provides declared product-performance information under a harmonised European framework. It does not replace the project designer’s responsibility to determine the required performance level.
EU Member States retain responsibility for many building-level requirements, including fire safety, energy performance and other construction requirements.
The required air, water and wind classes may vary according to:
A legally CE-marked door with a relatively modest declared class may still be unsuitable for an exposed high-rise façade.
Instead of asking only, “Do you have CE certification?”, use a structured comparison.
Ask each supplier to provide:
The strongest supplier is not necessarily the one displaying the most certification logos.
It is the supplier that can clearly connect:
tested specimen → product family → declared performance → production control → delivered doors
At TOF DOOR, we believe certification should not be treated as a marketing badge.
For international door projects, technical documentation must correspond to the real door construction, dimensions, hardware, threshold and intended application.
When evaluating exterior steel doors, buyers should review not only the existence of EN 14351-1 documentation, but also:
A recognisable certification brand may improve customer confidence, but technical scope, document traceability and product consistency are ultimately more important than the size of the certification organisation.
“EN 14351 three-performance CE certification” is a useful industry expression, but it should not be misunderstood as a standalone universal certificate.
Air permeability, watertightness and resistance to wind load are product-performance characteristics that must be assessed and declared within the correct regulatory and technical framework.
To verify a supplier, buyers should check more than the CE logo. They should examine the Declaration of Performance, test reports, product configuration, laboratory competence and the official notified-body scope.
The most reliable certification is not simply issued by the largest organisation.
It is the documentation that is valid, traceable, technically applicable and genuinely connected to the doors being delivered.
