TECHNICAL BOOK 4:
OIL FIRED APPLIANCE & SYSTEM INSTALLATION REQUIREMENTS
6.4.4 Where a Building Warrant is required:
The following works will require a Building Warrant when carried out within a house with 3 or
more storeys or a flat:
•
•
•
•
•
•
The installation of a new or replacement oil fired appliance with an output greater than
45kW.
The installation or alteration to a chimney or flue pipe (excluding any work associated
with installing a flue liner).
The construction of a hearth not affecting the floor or wall structure.
The installation of an oil storage tank (with a capacity greater than 90 litres) including
pipework connecting the tank to the combustion appliance.
The installation of a new unvented hot water cylinder (more than 15 litres capacity).
Any electrical installation or circuit where the voltage exceeds 50AC, 120DC.
For non-residential buildings with public access (this includes assembly and entertainment
buildings) with a storey or creating a storey not more than 7.5m high or any other nondomestic buildings a Building Warrant will be required for the same works as domestic
buildings (above).
NOTE:
There may be some circumstances when an aspect of work is being
performed that generally does not require a Building Warrant, but will require
a building warrant if that aspect of work is being performed as a part of other
building works e.g. a full restoration project. Further information regarding
building warrants should be obtained from the Local Authority responsible for
the geographical area where the works are to be carried out.
6.4.5 Minimum Provision for New Systems in New and Existing
Dwellings:
For oil fired boilers installed on or after 1st May 2007
•
All oil fired boilers shall have SEDBUK efficiency of not less than 86% (as rated by
SEDBUK 2005) and be of the condensing type.
For range cooker boilers:
•
All oil fired range cooker boilers shall have a SAP seasonal efficiency of not less than
75% as declared at www.rangeefficiency.org.uk
For oil fired boilers installed on or after 1st October 2010
•
All conventional oil fired boilers shall have SEDBUK efficiency of not less than 90% as
rated by SEDBUK 2005 and be of the condensing type. Published at www.sedbuk.com
•
All combination oil fired boilers shall have SEDBUK efficiency of not less than 86% as
rated by SEDBUK 2005 and be of the condensing type. Published at www.sedbuk.com
For range cooker boilers
•
All oil fired range cooker boilers shall have a SAP seasonal efficiency in excess of 80%
as declared at www.rangeefficiency.org.uk
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TECHNICAL BOOK 4:
OIL FIRED APPLIANCE & SYSTEM INSTALLATION REQUIREMENTS
Appliance minimum SEDBUK efficiencies on new build properties form part of the CO2
emissions calculation process which is integral to standard 6.1, it is therefore important that
the appliance efficiency utilised (as specified by the builder, developer, architect or
consultant) is matched to this requirement. No variation to this should take place without
prior consultation and agreement of the specifier.
General
Systems for space and domestic hot water are required to have:
•
Primary circuits of the fully pumped type with full boiler controls, interlock and zones.
Where space heating is provided, the system should be divided into a minimum of two
heating zones each with independent temperature interlock. See sub-section 3.18.6.
•
Thermostatic radiator valves are to be fitted on all radiators except those located in
bathrooms and rooms which incorporate a room thermostat.
•
An automatic bypass valve as required by the boiler manufacturer.
•
Vented copper hot water storage vessels associated with the system should meet the
heat loss and heat exchanger requirements in BS 1566: Part 1 2002
•
Un-vented hot water storage systems complying with BS 7206: 1990 or be the subject of
approval by a notified body to an equivalent level of safety and performance.
•
All appliances, systems and associated equipment fully commissioned in accordance
with the manufacturer’s instructions.
•
Occupiers of the building to be provided with information regarding maintenance and
energy efficient use of equipment.
6.4.6 Minimum Provision
Dwellings
for
Replacement
Systems
in
Existing
As defined for new systems.*
* Where an individual component such as the boiler only is being replaced, thermostatic
radiator valves can be omitted. However, best practice would be to fit them as part of the
contract of works.
Where it is impractical or uneconomical to install a condensing boiler the property may be
assessed for exemption using an OFTEC CD/30 Form. Where the outcome of an
assessment formally exempts the property from having a condensing boiler installed, and
the replacement boiler is a regular boiler, it must have a minimum SEDBUK efficiency of
85%. If the replacement boiler is a combination boiler, it must have minimum SEDBUK
efficiency of 82%.
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TECHNICAL BOOK 4:
OIL FIRED APPLIANCE & SYSTEM INSTALLATION REQUIREMENTS
6.4.7 Minimum Provision for New Non-Domestic Systems in New
Buildings
Installation before 1st October 2010
A minimum Effective Boiler Seasonal Efficiency as well as a minimum Boiler Seasonal
Efficiency is required for oil fired boilers:
•
Minimum Oil Boiler Seasonal Efficiency = 80% for any individual boiler
•
Minimum Oil Boiler Seasonal Efficiency = 84% for the overall multi-boiler system
Installation on or after 1st October 2010
A minimum Effective Boiler Seasonal Efficiency as well as a minimum Boiler Seasonal
Efficiency is required for oil fired boilers:
•
Minimum Oil Boiler Seasonal Efficiency = 82% for any individual boiler
•
Minimum Oil Boiler Seasonal Efficiency = 84% for the overall multi-boiler system
6.4.8 Minimum Provision for Replacement Non-Domestic Systems in
Existing Buildings
Installation before 1st October 2010
This requires that a minimum Effective Heat Generating Seasonal Efficiency as well as a
minimum Boiler Seasonal Efficiency is met. As it may not always be possible or practicable
to replace a standard efficiency non-domestic appliance with a high efficiency (condensing)
appliance in an existing non-domestic building it is possible to utilise additional efficiency
measures (over the minimum time, temperature, demand and zoning control requirements)
to achieve Heating Efficiency Credits (% points) to achieve compliance with the minimum
Effective Heat Generating Seasonal Efficiency as follows:
•
Minimum Effective Heat Generating Seasonal Efficiency (EHGSE) for Oil = 86%
•
Minimum Oil Boiler Seasonal Efficiency = 82%
Therefore if a boiler with a BSE of 82% was proposed to be used a minimum of four
additional percentage points of Efficiency Credits would be required to meet the minimum
figure of 86%. A boiler with a Seasonal Efficiency of 82% could be installed with:
•
Thermostatic Radiator Valves throughout = 1 Credit
•
Weather (internal/external temperature) compensation system = 1.5 Credits
•
Optimised Start/Stop controls = 2 Credits
When totalled the Effective Heat Generating Seasonal Efficiency = 82 + 1 + 1.5 + 2 = 86.5%
(exceeds minimum HGSE of 86%).
OR
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TECHNICAL BOOK 4:
OIL FIRED APPLIANCE & SYSTEM INSTALLATION REQUIREMENTS
For example the 82% BSE appliance installed in conjunction with the following:
•
Full building management system (BMS) = 4 Credits; would also achieve the minimum
EHGSE figure of 86%.
Installation on or after 1st October 2010
This requires that a minimum Effective Boiler Seasonal Efficiency as well as a minimum
Boiler Seasonal Efficiency is met. As it may not always be possible or practicable to replace
a standard efficiency non-domestic appliance with a high efficiency (condensing) appliance
in an existing non-domestic building it is possible to utilise additional efficiency measures
(over the minimum time, temperature, demand and zoning control requirements) to achieve
Heating Efficiency Credits (% points) to achieve compliance with the minimum Effective
Boiler Seasonal Efficiency as follows:
•
Minimum Effective Boiler Seasonal Efficiency (EBSE) for Oil = 86%
•
Minimum Oil Boiler Seasonal Efficiency = 84%
Therefore if a boiler with a BSE of 84% was proposed to be used a minimum of two
additional percentage points of Efficiency Credits would be required to meet the minimum
figure of 86%. A boiler with a Seasonal Efficiency of 84% could be installed with:
•
Thermostatic Radiator Valves throughout = 1 Credit
•
Weather (internal/external temperature) compensation system = 1.5 Credits
When totalled the Effective Boiler Seasonal Efficiency = 84 + 1 + 1.5 = 86.5% (exceeds
minimum EBSE of 86%).
OR
For example the 84% BSE appliance installed in conjunction with the following:
•
Optimised Start/Stop controls = 2 Credits; would also achieve the minimum EBSE figure
of 86%.
For further information regarding the minimum time, temperature, demand and zoning
control requirements, please refer to OFTEC Information Sheet, Approved Document L2a
and L2b (England and Wales) which is available on the OFTEC website www.oftec.org
6.4.9 Electrical Works
The Building Regulations in Scotland require that all electrical works are carried out to BS
7671.
6.4.10 Contact Details
To report a pollution incident contact the Pollution Hotline
0800 80 70 60
Scottish Environmental Protection Agency (SEPA)
www.sepa.org
The Scottish Building Standards (SBS)
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www.scotland.gov.uk
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