Nordpeis Q-27FL Manuel D'installation page 24

Recess example
Note!
The dimensions are the minimum
dimensions, unless otherwise
stated..
Wall of combustible material
Wall of non-combustible material, made of 100 mm
aerated concrete in the recess example.
Wall of non-combustible material that is not in contact
with combustible material and therefore has no mini-
mum thickness requirement.
Chimney breast
24
500
600
GB
100
100
100
100
100