Nu-Flame THE HOTBOX H.E., Инструкция по использованию, установке и обслуживанию, Страница: 14 / 27

14
14.1 - FALSE CHIMNEY BREAST CONSTRUCTION
There must be no combustible materials used inside the flue box.
14.2 – BS 715 FLUE BOX BUILT INTO A FALSE CHIMNEY BREAST WITH FIRE SURROUND OR HOLE IN THE
WALL INSTALLATION WITH REQUIREMENTS (See diagrams above).
A BS 715 Flue Box can be built into a false chimney breast and installed at floor level with a suitable Fire Surround.
or
The Fire can be Built-In part way up the wall to create a Hole in the Wall Installation, however
i
t is essential to use marble, slate or
stone slips, fitted around the builders opening. The slips must have a temperature rating of 150
º
C and be 20mm (min) thick by
100mm (min) wide.
In order to direct the flow of heated air away from the wall we recommend that a non combustible shelf (lip) is fitted above the top
slip, protruding 30mm – see diagram.
For Hole in the Wall fires it is recommended that a means, (tactile separator/shelf or guard) is provided to give abrupt warning to a
person moving inadvertently towards the fire.
a. A suitable BS715 Shallow Flue Box can be used with the minimum dimensions quoted above.
b. The base of the Flue Box must be level and square to the face of the fireplace opening.
c. The Flue Box must sit on Non Combustible Material of at least 12mm Thick.
d. The Flue Box can be placed against a Non Combustible wall at the rear, however if the wall is combustible it must be spaced
50mm from the wall.
e. When building a False Chimney Breast No Combustible materials must be closer than 50mm to the Flue Box.
f. No Combustible materials must be closer than 50mm to the Flue over its entire route through the Property.
g. The Flue Box must be Insulated on its top and sides with 50mm thick Non Combustible Fibreglass Insulation or Equivalent.
h. If plaster board is used in front of the flue box it must be sealed to the box with high temperature Silicone Sealant or an
equivalent flexible sealant.
i. If the Fire is to be fitted into a purpose made Fire Surround it must have a temperature rating of 150
º
C.
j. For a Fire Surround the fire requires a non-combustible hearth of at least 12mm thick.
k. The surface of the hearth must stand at least 50mm above the floor and level with the fireplace opening.
l. The hearth must project at least 300mm in front of the fireplace opening and 150mm either side (700mm minimum hearth width).
m. The Surround must cater for a minimum flat surface around the Fireplace Opening allowing 625mm high by 530mm wide. This is
essential in order to achieve a good seal between the face of the surround and the sealing flanges of the fire.
n. The Fire Surround must be fully sealed to the Fireplace Opening to ensure a good flue seal.
o. In order to direct the flow of heated air away from the wall we recommend that a non combustible shelf (lip) is fitted above the
top slip, protruding 30mm – see diagram in Section 14.1 on previous page.
p. There must be a flat surface around the opening of sufficient area to enable the slips to be securely fitted. The slips should be
fitted to the wall in such a way that they form a seal to stop air from the room being drawn behind the slips into the False
Chimney Breast. We recommend a high temperature silicon sealant.
BS715 Flue Box Hole In The
Wall Construction
14. BS715 SHALLOW FLUE BOX WITH TWIN WALL 5” FLUE – FALSE CHIMNEY BREAST
CONSTRUCTION WITH FIRE SURROUND OR HOLE IN THE WALL APPLICATIONS
BS715 Shallow Flue Box Application