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What is a Class 2 chimney?

A "Class 2 chimney" is a "flue way" or  125mm in diameter, or 5” in diameter .

Call 1 chimneys are typically found in more recent or modern constructed houses.

They are normally identifiable by the use of a metal flue instead of brick/concrete structure.

They may also have a special terminal on the roof and a metal flue box behind the fire.

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