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3. General requirements
3.1 Related documents
The installation of the boiler must be
in accordance with the relevant
requirements of Gas Safety (Installation
and Use) Regulations 1994, Health
and Safety Document No. 635 (The
Electricity at Work Regulations 1989),
BS7671 (IEE Wiring Regulations) and
the byelaws of the local Water
Undertaking. It should also be in
accordance with the relevant
requirements of the Local Authority,
Building Regulations, Building
Standards (Scotland) Regulations and
the relevant recommendations of the
following British Standards:-
BS 5440: Flues and ventilation of gas
fired boilers not exceeding 60 kW:
- Part 1: Flues
- Part 2: Ventilation
BS 5449: Specification for forced
circulation hot water for domestic
premises.
BS 5546: Specification for gas hot
water supplies for domestic premises.
BS 6700: Services supplying water
for domestic use within buildings and
their curtilages.
BS 6798: Specification for installation
of gas fired boilers not exceeding 60
kW input.
BS 6891: Specification for installation
of low pressure gas pipework up to
28 mm (R1) in domestic premises (2nd
family gas).
BS 7593: Treatment of water in
domestic hot water central heating
systems.
BRITISH GAS PUBLICATION DM2:
Guide for Installation in Timber
Framed Housing
Important
The appliance must be installed and
serviced by a competent person as
stated in the Gas Safety (Installation
and Use) Regulations 1994
3.2 Boiler location
The location chosen for the boiler must
permit the provision of a satisfactory
flue termination. The location must
also provide adequate space for
servicing and air circulation around
the boiler. The boiler may be installed
in any room, although particular
attention is drawn to the requirements
of BS7671 (I.E.E. Regulations) and, in
Scotland, the electrical provisions of
the Building Standards (Scotland)
Regulations, in respect of the installation
of a boiler in a room containing a
bath or shower.
(Note: Where a room sealed boiler
is installed in a room containing a
bath or shower, any electrical switch
or boiler control utilising mains
electricity should be so situated that it
cannot be touched by a person using
the bath or shower).
Where the installation of the boiler
will be in an unusual location, special
procedures may be necessary and BS
5546 and BS 6798 give detailed
guidance on this aspect.
The boiler must be mounted on a flat,
vertical wall, which must be sufficiently
robust to take the weight of the boiler.
The boiler may be installed on a
combustible wall, subject to the
requirements of the Local Authorities
and Building Regulations.
A compartment used to enclose the
boiler must be designed and
constructed specifically for this
purpose. (An existing cupboard or
compartment may be used provided
that it is modified for the purpose).
Details of essential features of
cupboard/compartment design
including airing cupboard installations
are given in BS 6798.
If the boiler is to be fitted in a timber
framed building, it should be fitted in
accordance with British Gas Publication
DM2 'Guide for Gas Installations in
Timber Framed Housing'.
