The complete guide to door closer power sizes (EN 1 to EN 7)

If you've looked at door closer specifications and wondered what "EN 3" or "EN 5" actually means, you're not alone. Power size is one of the most important — and most misunderstood — factors when selecting a door closer. Get it wrong and you'll either have a door that slams or one that won't close at all.

What does EN power size mean?

EN power size is defined by **BS EN 1154**, the European standard for controlled door closing devices. It describes the closing force — or torque — that the closer applies to return the door to the shut position.

The scale runs from EN 1 (lightest) to EN 7 (heaviest). Each size represents a specific range of closing moment (measured in Newton-metres), tested under controlled laboratory conditions.

Quick Selection Guide

Use this as a starting point. When in doubt, go one size up rather than down — an over-powered closer can be adjusted back; an under-powered one cannot make up the shortfall.

Need help choosing?

If you have the door dimensions and weight, our team can recommend the correct closer and EN power size for your application. We stock a full range of fixed and adjustable closers from dormakaba, GEZE, Briton, and Exidor — with same-day despatch on orders placed before 2pm.

Browse door closers by power size → https://www.doorspares.com