Operating instructions

1
2
3
7
5
6
7
9
8
Z
CONSTRUCTIONAL HEARTH
NON COMBUSTIBLE
125mm THICK MINIMUM
Z = At least 150mm or to a
suitably heat resistant wall
min 225mm
Z
non combustible wall
min thick Y
fireback and
insulated infill
Fireplace Opening
400mm (16”)
X
X
6
4
5
Fireback to
BS1251
Lintel or
Gather
Constructional Hearth
min 125mm thick
min 75mm
Change in flooring
level to distinguish
hearth
Clay Flue pipe
Typical installation