9
3.0
Site Requirements – Page 9
3.7 Clearances
(Fig. 8)
1.
Shelf Clearance
- minimum clearance from the hearth
to the underside of a combustible shelf should be 830mm
(32
21
/
32
in) provided the shelf depth is 150mm (5
29
/
32
in) or
less. When the shelf depth is increased by increments of
12.5mm (1
5
/
32
in) greater than 150mm (5
29
/
32
in), add
25mm (1 in) to the 830mm (32
21
/
32
in).
2.
Side of Fire
- minimum width between the vertical
sides of combustible surround should not be less than
675mm (26
5
/
16
in) provided the fire is central to the
surround and the sides do not project more than 150mm
(5
29
/
32
in). When the vertical side forward projection is
increased by 12.5mm (1
5
/
32
in) add 50mm (2 in) to the
inside width of the surround.
NOTE:
When the fire is fitted
this gives a minimum side clearance of 150mm (5
29
/
32
in).
3.8 Existing Chimneys & All Flue Systems
1. A chimney which has previously been used to burn
solid fuel MUST be swept before beginning the installation.
Any restrictions such as dampers or register plates must
be removed or disabled. Minimum equivalent height of 3
metres.
2. It must serve one appliance only and not have
branches or traps which could impede natural draught.
3. It essential that a positive flue pull up the chimney is
present.
4. If a terminal is fitted it must be suitable for the purpose.
5. If there is no positive airflow up the chimney
DO NOT
FIT THE FIRE
. Seek expert advice before continuing with
the installation. A positive flue pull can be detected by
holding a lighted match or taper near to the fireplace
opening (Fig. 9).
6. The fireplace recess must be of non-combustible
material. Any existing under-floor air supply must be
sealed completely.
