DEFRA Stove Installation and User Guide
allowed sufficient time to fully dry before using the stove or cracking is
likely to occur.
2.2
Combustible Materials
Please view the product sheet which accompanied your stove for specific
minimum distances to combustible measurements.
Ideally, adjacent walls should be of suitable non-combustible
construction, preferably brickwork.
In large fireplaces take care that any supporting beam is protected by
a 13mm sheet of heat resistant fire board spaced 12mm off the surface
with strips of non-combustible material. Make sure that there is a gap
between an un-insulated flue system and any combustible material. This
gap must be at least 3X the outside diameter of the flue pipe, or 1.5X
the flue diameter to non combustible surfaces. Please consult the flue
manufacturers specification for insulated flues.
2.3
Air for Combustion
All stoves require ventilation to burn safely and correctly. There are a
number of requirements that need to be met when installing a stove, for
example, allowing for the permeability of the house (air permeability is the
general seepage of air into the house via air vents, doors and windows
etc.)
There must always be a permanent means of providing air for
combustion into the room in which the stove is installed. Air starvation
will result in poor flue draw and may cause smoke to leak into the room.
For all installations it is recommended that a permanent vent with a
total free area of at least 550mm
2
for every kW above 5kW should be
connected directly to the outside air. Installations in properties built after
2008 should have their vent increased by a further 330mm
2
for each of
the the first 5kW. Alternatively this air can be supplied through an external
wall of an adjacent room, which itself has to be connected to the room the
appliance is installed by a permanent vent of the same size.
BK575 Rev02
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