8
3.0
Site Requirements – Page 8
3.4 Twin Walled Metal Flue Boxes
1. A double walled metal flue system conforming to the
constructional requirements of BS 715 with a minimum
internal flue diameter of 125mm (5in) should be used.
The flue box should be of the Selkirk LFE 125 type or
similar.
2.
Remove the restrictor plate from the fire before
fitting to this type of flue (see Fig. 12).
3. The metal flue box must stand on a non-combustible
base of a minimum thickness of 50mm (2 in) and a
separate non-combustible hearth should be supplied with
minimum dimensions as under Hearth Mounting.
4. The metal flue box must be located so that the sides,
top and back surfaces have a minimum air gap clearance
of 50mm from any combustible material.
5. A fitting kit (Baxi Part N
o
240125) is required to
complete the installation. Further instructions are supplied
with kit.
3.5 Hearth Mounting
1. The fire is intended to be hearth mounted only. The
hearth must be of a non-combustible material at least
13mm ( ½ in) thick and measuring at least 300mm (11
13
/
16
in) deep by 580mm (22
27
/
32
in) wide. It must be fitted
central to the fireplace opening. The top surface of the
hearth should be a minimum of 50mm (2 in) above floor
level (Fig. 6).
2. On no account should the fire unit be fitted directly
onto a combustible floor or carpet.
3. Alternatively, a fender rail or upstanding edge of
50mm (2in) height can be fitted to the periphery of the
13mm ( ½ in) non-combustible hearth (Fig. 7).
3.6 Purpose Built Hearths & Surrounds
1 Purpose built superimposed fire resistant hearths and
back panels specified as suitable by the manufacturer
may be used, or a suitable propriety fire surround with
150º C rating.
