EI1 and EI2 fire doors differ in the strictness of their insulation criterion, and EI 60 and EI 120 differ in the duration of fire resistance they provide: EI2-60 means the door maintains its integrity and insulation performance (less strict criterion) for at least 60 minutes under standardised fire test conditions, while EI2-120 provides that same protection for a minimum of 120 minutes. EI1 variants apply a stricter insulation limit throughout the same durations. The correct classification for any given opening is not a matter of preference but the outcome of a project-specific fire safety calculation.<\/p>\n
Both classifications fall under the European fire resistance standard EN 13501-2, which governs how building elements, including doors, are tested and rated. Selecting between them requires understanding what the letters and numbers each represent, how national building regulations interact with those classifications, and what documentation you need to specify either product with confidence.<\/p>\n
The numbers 60 and 120 in EI2-60 and EI2-120 indicate the minimum number of minutes a fire door must maintain its performance criteria under standardised fire test conditions as defined by EN 1634-1. A door classified EI2-60 has been tested and confirmed to hold for at least 60 minutes; EI2-120 holds for at least 120 minutes. These are not approximations or averages but verified minimum thresholds.<\/p>\n
The letters before the number define what the door must actually resist during that time period. E<\/strong> stands for integrity, meaning the door must prevent the passage of flames and hot gases. I<\/strong> stands for insulation, meaning the temperature on the unexposed face of the door must remain below a defined threshold throughout the test duration. A door carrying both E and I must satisfy both criteria simultaneously for the full rated period. It is essential always to specify whether the insulation criterion is I1 or I2 \u2014 never write “EI” alone without the suffix, as the two represent measurably different levels of performance.<\/p>\n This combination matters practically because a door that maintains integrity but fails on insulation would still allow enough radiant heat through to ignite materials or injure people on the other side. For compartmentation purposes where occupants may be sheltering or evacuating, the insulation criterion is often as critical as flame containment.<\/p>\n The classification system also includes intermediate durations such as EI1-30 \/ EI2-30, EI1-45 \/ EI2-45, and EI1-90 \/ EI2-90, and extends beyond 120 minutes for specialist applications. Metacon-Next’s fire-rated product range<\/a> covers EI1-30 \/ EI2-60, EI1-60, EI1-120 \/ EI2-120, and EI2-90 as standard classifications across multiple door types, with testing conducted and verified by Efectis.<\/p>\n Contact us<\/a>\n <\/div>\n<\/div>\n EI1 and EI2 represent two different strictness levels for the insulation criterion within the EI classification. EI2 is the less strict insulation criterion: it limits the average temperature rise on the unexposed face to 140 K and the maximum at any single point to 180 K. EI1 applies a stricter limit, restricting the maximum temperature rise at any single point to 140 K, making it significantly more demanding.<\/p>\n In practice, EI2 is the default classification referenced in most European specifications. EI1 is specified in contexts where a higher degree of thermal protection is required \u2014 for example where the unexposed side is immediately adjacent to heat-sensitive materials, vulnerable occupants, or specific process environments.<\/p>\n It is essential never to write EI without specifying whether you mean EI1 or EI2 in a specification document. The two classifications represent measurably different levels of performance, and a door tested to EI2 does not automatically satisfy EI1 requirements. Leaving the suffix ambiguous creates a gap in the specification that can cause problems during permitting or a fire safety review.<\/p>\n When reviewing product documentation from any manufacturer, confirm which insulation criterion the test report covers. Classification reports from a recognised body such as Efectis will state this explicitly. If the documentation is unclear on this point, that is a signal worth following up before the product is specified.<\/p>\n EW is a fire door classification that combines integrity (E) with radiation reduction (W), rather than full insulation. A door classified EW limits the passage of flames and hot gases and reduces radiant heat transfer through the door to a defined level, but it does not restrict the temperature rise on the unexposed face to the same degree as an EI1- or EI2-classified door. In the Netherlands, EW60 is the standard baseline criterion applied under Dutch building regulations \u2014 it is the default starting point, not a minimum that is rarely met.<\/p>\n The practical consequence of this distinction is significant. An EW door reduces the risk of radiant ignition on the unexposed side but does not provide the same level of thermal protection to people or materials in the immediate vicinity. An EI1 or EI2 door, by contrast, keeps the unexposed face cooler, allowing closer proximity without the same risk of heat injury or secondary ignition.<\/p>\n Neither classification is universally superior. The correct choice depends on the specific function of the fire compartment boundary, the distances involved, the occupancy type, and the conclusions of the fire safety calculation for that project. Specifying EW where EI1 or EI2 is required, or EI1 \/ EI2 where EW would suffice, both represent specification errors with regulatory and liability consequences. Whether a particular classification is adequate for a specific application depends on a project-specific fire safety calculation \u2014 consult a qualified fire safety engineer or Metacon-Next directly rather than relying on general guidance.<\/p>\n Never treat EW and EI1 \/ EI2 as interchangeable or as points on a single scale. They measure different physical phenomena. A specification that calls for EI2-60 cannot be satisfied by an EW 60 door, even if the duration is identical. Always confirm the required classification criterion with the fire safety engineer before finalising the product specification.<\/p>\n There is no universal rule that makes EI2-60 sufficient or EI1-120 \/ EI2-120 required for a given building type. The required fire resistance duration and insulation criterion for any specific opening are determined by a project-specific fire safety calculation, not by a blanket classification assigned to a sector or building use. The BBL (Besluit Bouwwerken Leefomgeving, formerly Bouwbesluit) sets only the absolute minimum threshold; actual project requirements frequently exceed that minimum based on deviations from standard building regulations, sector-specific regulation, insurer requirements, or client specifications.<\/p>\n That said, certain factors consistently drive higher fire resistance requirements. Larger fire compartments, longer evacuation routes, higher occupancy loads, and the presence of hazardous materials all tend to result in longer required resistance durations. Industrial buildings handling flammable substances may be subject to sector-specific regulations such as PGS15, which can impose requirements beyond what the BBL alone prescribes.<\/p>\n EI2-60 is frequently encountered in compartmentation between standard industrial or logistics spaces where the fire safety calculation supports a 60-minute separation. EI1-120 or EI2-120 appears more often in applications where the separation boundary must remain effective for a longer period \u2014 for example between a production area and an adjacent office block, between different risk zones within a complex, or where the fire safety engineer has determined that evacuation or intervention will take longer than 60 minutes. Whether EI1 or EI2 is appropriate within those durations depends on the required strictness of the insulation criterion, which is likewise determined by the fire safety calculation.<\/p>\n The decision belongs to the fire safety engineer, not the architect or the manufacturer. The architect’s role is to specify the correct classification once that determination has been made, and to source a product that is demonstrably tested and certified to meet it. If you are at specification stage without a confirmed fire safety calculation, treat the required classification as provisional and document that dependency clearly in the design file.<\/p>\n To specify an EI1 or EI2 fire door \u2014 whether at 60 or 120 minutes \u2014 with confidence, you need four categories of documentation: a CE declaration of performance, the underlying classification report from an accredited test body, technical product data sufficient to confirm dimensional and installation compatibility, and an Environmental Product Declaration (EPD) if the project involves sustainability assessments such as BREEAM or LEED.<\/p>\n The CE declaration of performance confirms that the product meets the requirements of the Construction Products Regulation (CPR) and has been assessed against the relevant harmonised standards. For fire-rated industrial doors, two CE-relevant standards apply simultaneously: EN 16034 (fire- and smoke-resisting closing elements) and EN 13241 (industrial doors generally). The declaration must state the fire resistance classification explicitly, including the correct EI1 or EI2 suffix and the tested duration.<\/p>\n The classification report from the test body, such as Efectis, provides the underlying evidence for the CE declaration. It documents the test conditions, the door configuration tested, the dimensions covered by the test or extended application rules under EN 15269, and the result. This report is what a building inspector or fire safety reviewer will examine if the specification is questioned. Requesting this document at specification stage \u2014 not after order placement \u2014 is standard professional practice.<\/p>\n Technical data, including cross-sections, installation clearances, frame requirements, and maximum opening dimensions, must be confirmed against the actual opening in the design. A door that is correctly classified but incompatible with the structural opening or the installation conditions creates a compliance problem that surfaces during construction, not during design.<\/p>\n Contact us<\/a>\n <\/div>\n<\/div>\n EPDs have become increasingly relevant for architects working on sustainability-rated projects. An EPD is a standardised document that quantifies the environmental impact of a product across its full lifecycle \u2014 from raw material extraction to end-of-life processing. It is not an environmental label or a quality award, but it provides the data required for BREEAM and LEED material assessments. Metacon-Next makes its classification reports, CE declarations, and EPDs publicly available for its product range<\/a>, which removes the documentation chase that commonly delays specification decisions.<\/p>\n If a supplier cannot provide all four document categories on request, that gap is worth addressing before the product is written into a specification. Incomplete documentation at specification stage tends to create larger problems during permitting or construction. Reach out to Metacon-Next directly<\/a> if you need to confirm which documentation is available for a specific product configuration before committing to a specification.<\/p>\n For architects working on industrial construction or renovation projects, requesting a quotation<\/a> from Metacon-Next also gives access to the full technical file for the relevant product, including dimensional data and installation requirements, without requiring a separate documentation request. The Metacon-Next product platform<\/a> is designed to support specification decisions at drawing stage, with the documentation in place to close a design file without follow-up. Learn more about the company’s approach to certified fire door manufacturing on the about us page<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" EI 60 and EI 120 fire doors differ by duration \u2014 but choosing correctly requires more than reading the numbers.<\/p>\n","protected":false},"author":12,"featured_media":27694,"template":"","categories":[1],"tags":[],"class_list":["post-27368","knowledge-base","type-knowledge-base","status-publish","has-post-thumbnail","hentry","category-news"],"yoast_head":"\nWhat is the difference between EI1 and EI2 insulation criteria?<\/h2>\n
How does EW differ from EI as a fire door classification?<\/h2>\n
When is EI2-60 sufficient and when is EI1-120 or EI2-120 required?<\/h2>\n
What documentation is needed to specify an EI1 or EI2 fire door?<\/h2>\n