Is EI 30 worse than EI 60?

No. EI 30 is rated for a shorter time and is specified where the building's fire-safety design calls for 30 minutes. The right class for each opening comes from that design, not from 'more is better'.

How do I check a door's class?

Ask for the certificate. The fire-resistance class is stated on it. Request it before you order, not at handover.

What is the difference between E and EI?

An E rating covers integrity only — holding back flames and hot gases. An EI rating adds I, insulation, so the door also limits the heat reaching the protected side. Doors for escape routes are usually specified as EI.

Which classes does Unigon supply?

Entrance doors in EI 30 and EI 60, and fire doors in EI 45, EI 60, EI 90 and EI 120, in standard and custom sizes.

What EI 30, EI 60, EI 90 and EI 120 mean

You have seen "EI 60" on a door schedule or a quotation and wondered what it actually guarantees. The label is not marketing — it is a measured fire-resistance class, and understanding it is the difference between ordering the right door and failing an inspection.

The short version

EI is a fire-resistance class. It has two letters and a number:

E — integrity. The door keeps flames and hot gases from passing through to the other side.
I — insulation. The door limits how much heat reaches the protected side, so the surface facing the escape route stays cool enough that a fire does not spread by radiated heat alone.
The number — minutes. It is how long the door holds both criteria in a standard fire test. An EI 60 door meets integrity and insulation for 60 minutes.

So "EI 60" reads as: holds flames, hot gases and heat for sixty minutes.

What each class is, in plain words

Class	Holds integrity + insulation for	Typical role
EI 30	30 minutes	Apartment entrances and internal openings where the design calls for 30 minutes
EI 45	45 minutes	An intermediate class specified by some fire-safety designs
EI 60	60 minutes	A common requirement for corridors, stairwells and many entrance doors
EI 90	90 minutes	Higher-risk separations in larger or taller buildings
EI 120	120 minutes	The highest class, for the most demanding compartment lines

The number is a tested duration, not an estimate of how long the door will "probably" last. It comes from a standard furnace test in which the door is exposed to a defined temperature curve and watched for the moment it loses integrity or insulation.

Why the insulation part matters

It is tempting to think a fire door only needs to "not have a hole in it." But a door can keep its integrity — no flames or gas passing — while the metal itself heats up so much that it radiates enough heat to ignite materials on the safe side. That is why the I exists. A door that stops flames but cooks the corridor is not protecting the escape route. For doors on evacuation routes, the insulation criterion is usually what the designer is really buying.

Which classes Unigon makes

Unigon DOORS supplies two families, both with certified fire resistance and in standard or custom sizes:

Entrance doors: EI 30 and EI 60. A flat's front door can itself be part of the building's fire strategy.
Fire doors: EI 45, EI 60, EI 90 and EI 120 — for corridors, stairwells, technical rooms, evacuation routes and compartment lines.

Every class we state is backed by a certificate. We produce to the project's dimensions, so the class you specify is the class you receive, at the size the opening needs.

How to know which class you need

This is the question that matters, and the honest answer is: it is not a preference, it is a specification. The class required for each opening is set by the building's fire-safety design, prepared under the technical regulation approved by Government of Georgia Decree No. 41. A procurement manager does not choose EI 60 because it sounds safe; the designer assigns it to that opening.

The practical move is simple:

Take the door schedule or fire-safety drawings for your project.
Each opening on it already carries, or should carry, a required class.
Send us that schedule. We match each opening to a door of the right class, quote standard and custom sizes together, and hand over the certificates with delivery.

If the schedule does not yet name classes per opening, that is a conversation to have with your fire-safety designer first — we will not guess a rating, and you should be wary of any supplier who does.

A quick checklist before you order

Every opening on the schedule has a required class (EI 30 / 45 / 60 / 90 / 120).
The door's certificate states that class — ask to see it before ordering.
Sizes are confirmed, standard or custom, per opening.
Hardware (closer, anti-panic bar, smart lock) is specified where needed.
The certificate pack will be handed over at delivery for the inspection.

Get the class right the first time

Send us your door schedule and we will match each opening to its certified class, in the sizes your project needs, supplied across Tbilisi, Batumi, Kobuleti and Rustavi.