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17
1. FLUE OR CHIMNEY
1.1 The flue or chimney system must be in good condition.
It must be inspected by a competent person and passed for
use with the appliance before installation.
Products of combustion entering the room can cause
serious health risks.
1.2 The following must be checked:
—The construction of the masonry chimneys, flue block
chimneys and connecting flue pipe system must meet
the requirements of the Building Regulations
†
.
—A flexible flue liner system can be used if certified for
use with solid fuel systems and installation complies with
manufacturer’s instructions and Building Regulations
†
.
The flue liner must be replaced when an appliance is
replaced, unless proven to be recently installed
and in good condition.
—If it is necessary to fit a register plate it must conform to
the Building Regulations
†
.
—The minimum height of the flue or chimney must
be 4.5m from the hearth to the top of the flue, with no
horizontal sections and a maximum of 4 bends.
Bends must have angles of less than 45 degrees from the
vertical.
—Ensure the connecting flue pipe is kept a suitable
distance from any combustible material and does not
form part of the supporting structure of the building.
—Make provision to remove the appliance without the
need to dismantle the chimney.
—Any existing flue must be confirmed as suitable for
the new intended use as defined in the Building
Regulations
†
.
—The flue or chimney systems must be inspected and
swept to confirm the system is structurally sound and
free from obstructions**.
—If the chimney is believed to have previously served
an open fire it must be swept a second time within
a month of regular use after installation to clear
any soot falls that may have occurred due to difference
in combustion levels.
—The flue exit from the building must comply with local
building control rules
†
.
—Do not connect or share the flue or chimney system
with another heating appliance.
1.3 Do not connect to systems containing large voids or spaces
over 230mm square.
1.4 Suitable access must be provided to enable the collection
and removal of debris.
1.5 The flue must be swept and inspected when the appliance
is installed.
1.6 The flue draught must be checked with all windows and
doors closed and any extraction fans in this, or adjoining
rooms, running at maximum speed (see next section for
additional ventilation requirements).
Max. Draught = 2.0mm Wg
Min. Draught = 1.0mm Wg
SITE REQUIREMENTS
In the U.K.
*The design of the flue and chimney systems and products
used should meet the requirements of ADJ along with any
other relevant, National or European standards that may
apply. Products should be specified with regard to the type
of appliance, position within the building, fuels to be used
and appliance operating temperatures.
**This should be done by a HETAS Approved Chimney
Sweep (UK only) see page 27 / INFO registered (Republic
of Ireland only) who will issue you with a certificate.
† Building Regulations Document J
Flue Plate:
Where a hearth, fireplace, flue or chimney is provided or
extended (including cases where a flue is provided as
part of refurbishment work), information essential to the
correct appliance and use of these should be permanently
posted in the building, to meet Requirement J4 of the
Building Regulations (England and Wales), F3.12 (Scotland).
Additional:
A new factory made system that complies to EN 1856; Part 1
can be used providing installation is to the requirements of:
i) BS 7566 Parts 1 -4
ii) the manufacturer's instructions
iii) Building Regulations.
For a guide containing information on Chimneys and Flues
contact:
The British Flue & Chimney Manufacturers’ Association,
FETA
2 Waltham Court
Milley Lane
Hare Hatch
Reading
Berkshire RG10 9TH
Tel: 0118 9403416 e-mail: info@feta.co.uk