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Regulations
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Regulations
Installation regulations
Current Gas Safety (Installation and Use) Regulations:
All gas appliances must be installed by a competent, registered gas
engineer, such as a Gas Safe registered engineer or British Gas engineer
in accordance with the current regulations.
Failure to install appliances correctly could lead to prosecution.
The appliance must be installed in accordance with, and comply to, the
current:
▶ Gas Safety Regulations
▶ IET Regulations
▶ Building Regulations (England)
▶ Building Regulations (Wales)
▶ Building Standards (Scotland) (Consolidation)
▶ S.I. No. 183 and 292 - Energy Performance of Buildings Regulations
(Ireland; current version)
▶ Health and Safety Document 635 (The Electricity at Work
Regulations 1989) and any other local requirements
▶ EU Regulations No. 2017/1369 - Energy Labelling (as retained in UK
law and amended)
▶ EU Regulations No. 811/2013 - Energy Labelling (as retained in UK
law and amended)
Building Regulations Part L1A (Current version) - new dwellings
If the installation is in a new build property or it is a first time installation
in an existing property, the heating systems must conform to current
building regulations Part L1A.
The exception to this are single storey, open plan dwellings where the
living area is more than 70% of the total usable floor area. Then this type
of dwelling can be controlled as one zone.
An alternative would be individual electronically controlled TRVs.
For dwellings with a floor area over 150m
temperature control for each zone is required. It is best practice to fit
Thermostatic Radiator Valves (TRV's) to all radiators except the area
where the room thermostat is sited.
Building Regulations Part L1B (Current version) - existing dwellings
For appliance replacements on an existing system, it is not necessary to
zone the upstairs and downstairs separately, compliance with the zone
requirements can be achieved by a single room thermostat or
programmable room thermostat.
While the system is drained down, it is best practice to fit Thermostatic
Radiator Valves (TRV's) to all radiators except the area where the room
thermostat is sited.
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, separate time and
British Standards
Where no specific instruction is given, reference should be made to the
relevant British Standard codes of Practice.
• BS7074:1
– Code of practice for domestic and hot water supply
• BS6891
– Installation of low pressure gas pipework up to 28mm (R1)
• BS5546
– Installation of gas hot water supplies for domestic purposes
• EN12828
– Central heating for domestic premises
• BS5440:1
– Flues and ventilation for gas appliances of rated heating not
exceeding 70kW (net): Flues
• BS5440:2
– Flues and ventilation for gas appliances of rated heating not
exceeding 70kW (net): Air Supply
• BS7593
– Treatment of water in domestic hot water central heating systems
• BS6798
– Installation of gas fired boilers of rated input up to 70kW (net)
• BS7671
– IET Wiring Regulations
Irish Standards
The current relevant Irish standards should be followed, including:
• ECTI
– National rules for electrical installations
• IS 813
– Domestic Gas Installations
Timber framed buildings
Where the appliance is to be fitted to a timber framed building the
guidelines laid down in BS5440: Part 1 and IGE "Gas Installations in
Timber Frame Buildings" should be adhered to.
Water supply:
All seals joints and compounds (including flux and solder) and
components used as part of the secondary domestic water system must
meet the requirements of the WRC and hold approval by a notified body,
e.g. WRAS. The installation must also comply with the requirements of
Part G of the Building Regulations.
CH Water
Salt based artificially softened water must not be used to fill the central
heating system.
Greenstar 1000 – 6721835943 (2023/08)
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