Building regulations for boilers don't stay still for long. A new edition can replace the one your installer has been quoting from, a circular can change how an existing paragraph is read without changing a word of it, and a document's title can change in a way that sends you to the wrong page if you search for it by the old name. Each of the recent changes below touches a different part of your quote.

Circular 04/2026: amendments to Approved Document L and F

A circular doesn't replace a document, but it can change how an existing paragraph is meant to be read. Circular 04/2026 sets out amendments to Approved Document L and Approved Document F. If your installer quotes a paragraph number you recognise, check what the circular changed before assuming it still means what it used to.

2026 edition of Approved Document L published

A new edition of Approved Document L has been published, and it doesn't apply to every job from the day it appears. Transitional provisions decide which installations still follow the previous edition and which follow the new one. Check which edition applies to your job before you check the figures on your quote against either one.

Volume 1 retitled 'Energy and Greenhouse Gas Emissions'

Volume 1 of Approved Document L used to be called 'Conservation of fuel and power'. It now carries the title 'Energy and Greenhouse Gas Emissions'. Search for the document under its old name and you'll land on a superseded page; see what else changed between the two editions.

None of this moves where your flue can terminate. Flue position comes from Approved Document J and the manufacturer's instructions. A new edition of Approved Document L doesn't change those distances.