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12.2 - FIREPLACE MINIMUM REQUIREMENTS (See diagram in section 12.1)
With the Majority of Pre-Cast Flue Fireplaces there should be sufficient depth-width however the minimum
Dimension shown in the diagram on the previous page must be provided
a.
The Minimum Pre-cast Flue Size is 67mm deep by 198mm wide with Starter Blocks providing a Minimum Depth of 115mm by 305mm
wide. No part of the Flue must be less than 63mm.
b.
The height of the Pre-cast Fireplace opening must be between 555mm and 580mm. If the Starter Blocks have not been provided
down to Floor level then building work will be required.
c.
Where the Pre-cast Flue Fireplace with Starter Blocks provide less than minimum depth of 65mm and width of 305mm a purpose built
extension will be required..
This Extension must be made of Non Combustible materials and fully sealed to the Existing Fireplace.
d.
With more up to date Pre-cast Fireplaces the minimum dimensional requirements may be available with no additional building work.
e.
If the Fire is to be fitted with a Rebated Fire Surround it must have a temperature rating of 150
º
C.
f.
The Fire Surround must be fully sealed to the Fireplace Opening to ensure a good flue seal.
g.
The Fire requires a non-combustible hearth with an upper surface of at least 12mm thick.
h.
The surface of the hearth must stand at least 50mm above the floor and level with the fireplace opening.
i.
The hearth must project at least 300mm in front of the fireplace opening and 150mm either side (700mm minimum hearth width).
j.
The base of the fireplace must be flat, level and square to the face of the fireplace opening.
k.
The Surround must cater for a minimum flat surface around the Fireplace Opening allowing 630mm high by 630mm wide.
This is essential in order to achieve a good seal between the face of the surround and the sealing flanges of the fire.
l.
The Fireplace Opening should have provision for a gas supply through the rear, see Section 10 Gas Supply.
m.
The Thermatronic controlled fire is fitted with Electronic Equipment, which is sensitive to dampness and high humidity so it is
Very Important
that any rendering/building work is allowed to thoroughly dry out before Installation.
! IMPORTANT NOTE !
Dry lined walls – ensure that any air gaps between the back of the plasterboard and wall are sealed
around the builders opening or fireplace as this can affect flue pull and wall staining.
Pre-Cast Flues – ensure the walls are dry lined over the route of the flue otherwise wall cracking will
occur.
12.3 - CLEARANCES TO COMBUSTIBLE MATERIALS AND SHELVES (Ref: Diagram in section 12.1)
a.
A 150mm
non combustible
shelf can be fitted above the fire and should be positioned at least 680mm above the hearth.
For deeper non-combustible shelves they must be raised a further 25mm for every extra 25mm of depth.
b.
A 150mm
combustible
shelf can be fitted above the fire but must be positioned at least 750mm above the hearth.
For deeper combustible shelves they must be raised a further 25mm for every extra 25mm of depth.
c.
The sidewalls of a combustible fire surround can be 250mm from the inside of the builders/fireplace opening provided its depth is no
more than 150mm, however this must be increased by 25mm per side for every extra 25mm of depth.
d.
With all heating appliances, soft furnishings, decorations and wall coverings may discolour or scorch if placed too close.
e.
No combustible material, e.g. curtains must be closer than 500mm to the builders opening.
f.
Any combustible wall claddings (wall paper) must be cut back to a height of 750mm and 300 mm either side of the Fireplace Opening.
g.
Due to the heat output of The Fenton CF it is
not recommended
to use blown vinyl wall covering around the fire.
NOW PROCEED TO SECTION 14 - FIXING THE FIRE.
