Connect solid fuel appliances to flue system

Business Sectors (Suites): Chimney Occupations (Construction)
Developed by: Construction Skills
Approved on: 31 Dec 2022


This standard is about the inspection, preparation and connecting of a solid fuel appliance up to 50kW to a domestic, or commercial flue ways or chimney services and systems designed to operate under negative flue pressure, those without internal electronic control systems and those not intended to be connected to plastic flue systems. 
This will include the interpretation of current relevant statutory standards, information, and adopting safe, healthy and environmentally responsible work practices, selecting and using materials, components, tools and equipment, in accordance with the work area and the organisational procedures which are equal to or exceed the current statutory and legislative documentation and specifications
This standard is for people working in the occupational area of Chimney Occupations and can be used by operatives, supervisors and managers
A description of terms in bold font in this National Occupational Standard can be found in the Glossary which should be used as a reference point

Performance criteria

You must be able to:

​Interpretation of information
P1 interpret the information relating to the work and resources to confirm its relevance for the following:
•  documentation and specifications
•  drawings
•  schedules
•  contract information
•  pre-installation surveys
•  risk assessments
•  method statements
Safe work practices
P2 comply with the relevant legislation, official guidance and organisational procedures, to carry out your work and maintain safe, healthy and environmentally responsible work practices relating to the following:
•  methods of work
•  safe use of health and safety control equipment relevant to the           task being undertaken and the working environment
•  safe use of access equipment and working platforms
•  safe use, storage and handling of materials, tools and equipment
•  specific risks to health including mental health
•  specific risks associated with asbestos containing materials
•  specific risks associated with silica dust, mortars and sealants
Selection of resources
P3 select the required quantity and quality of resources for the methods of work:
•  materials, components and fixings
•  tools and equipment
•  access equipment
Minimise the risk of damage
P4 comply with organisational procedures to minimise the risk of damage to the work and surrounding area by:
•  protecting the work and its surrounding area from damage
•  maintaining a safe, clear and tidy work area 
•  disposing of waste in accordance with         current legislation and industry best practice
Meet the contract specification
P5 comply with the contract information to carry out the work efficiently to the required specification by the following:
•  demonstrating work skills to measure, cut, position, secure, test         and connect solid fuel appliances to a flue system
•  using and maintaining all hand and power tools and ancillary            equipment
•  inspecting and preparing work areas and work activities for                connecting an appliance to a flue system,
•  inspecting and testing the siting and installation of solid fuel               appliances in accordance with statutory and manufacturer’s              requirements including open and inset fires
•  identifying adequate ventilation to support correct performance
•  reporting identified defects to the appropriate party
•  carrying out suitable performance tests to ensure intended                  function and combustion
•  advising end user of correct fuels, efficient use of appliance and        importance of regular servicing and maintenance
Allocated time
P6 complete the work within the estimated, allocated time in accordance with organisational procedures, the programme of work and to meet the needs of other occupations and/or client

Knowledge and Understanding

You need to know and understand:

P1 Interpretation of information
K1 why organisational procedures have been developed to report and rectify inappropriate information and unsuitable resources, and how they are implemented
K2 the types of information, their source and how they are interpreted in relation to:
•  documentation and specifications
•  drawings
•  schedules
•  contract information
•  pre-installation surveys
•  risk assessments
•  method statements
K3 the range of relevant digital services, tools and systems, and how they are used
K4 the importance of organisational procedures to record, report and solve problems with the information and why it is important to follow them
P2 Safe work practices
K5 information for current legislation and official guidance and how it is applied
K6 the types of fire extinguishers and how and when they are used in relation to water, CO2, foam, powder
K7 how emergencies should be responded to and reported in accordance with organisational authorisation and personal skills in relation to: 
•  fires, spillages and injuries
•  emergencies relating to occupational activities
•  identification and reporting of asbestos containing materials
K8 the organisational security procedures for tools, equipment and personal belongings in relation to:
•  operative 
•  site
•  workplace
•  vehicles
•  company
•  customer
•  the general public
•  other occupations within the workplace
K9 how to report risks and hazards identified by the following:
•  methods of work
•  risk assessment
•  personal assessment
•  manufacturers’ technical information
•  statutory regulations
•  official guidance
•  Control of Substances Hazardous to Health (COSHH)
K10 the accident reporting procedures and who is responsible for making the report
K11 why, when and how health and safety control equipment identified by the principles of prevention should be used in relation to:
•  collective protective measures
•  personal protective equipment (PPE)
•  respiratory protective equipment (RPE)
•  local exhaust ventilation (LEV)
K12 how to comply with environmentally responsible work practices to meet current legislation and official guidance when dealing with potential accidents, health hazards and the environment in relation to working:
•  in the workplace
•  below ground level
•  in confined spaces
•  at height
•  with tools and equipment
•  with materials and substances
•  whilst moving and storing materials by manual handling and             mechanical lifting
•  when installing solid fuel appliances
P3 Selection of resources
K13 why the characteristics, quality, uses, sustainability, limitations and defects associated with the resources are important and how defects should be reported and rectified
K14 the organisational procedures to select resources, why they have been developed and how they are used
K15 how to confirm the resources and materials conform with the specification
K16 how the resources should be used and how any problems associated with the resources are reported in relation to:
•  protective equipment and screens 
•  connecting flue pipes and adaptors
•  heat shields
•  fixings and fittings
•  fire cement
•  mortars
•  sealants
•  insulation materials
•  hand and power tools and ancillary equipment
K17 how to identify the hazards associated with the resources and methods of work and how they are overcome
K18 how to calculate the quantity length and area associated with the method and procedure to connect solid fuel appliances to the flue system
P4 Minimise the risk of damageK19 how to protect work and its surrounding area from damage and the purpose of protection from general workplace activities, other occupations and adverse weather conditions and how to minimise damage to existing building fabric
K20 why and how the disposal of waste must be carried out safely in accordance with the following
•  environmental responsibilities
•  organisational procedures
•  manufacturers’ information
•  statutory regulations
•  official guidance
K21 why it is important to maintain a safe, clear and tidy work area
P5 Meet the contract specification
K22 how the methods of work, to meet the specification, are carried out and how problems are identified and reported by the application of knowledge for safe, healthy and environmentally responsible work practices, procedures and skills relating to the method and area of work in relation to the following:
•  the relevance of an assessment and how to recognise specific            requirements for structures of special interest, traditional                  construction, hard-to-treat buildings and buildings of historical        significance
•  how to inspect, prepare and connect open and closed solid fuel         appliances up to 50kW to a flue system, in accordance with              statutory and manufacturer's instructions
•  how to identify the correct heat output from an appliance to            meet the requirements
•  why it is important to inspect and test chimney and appliance          performance and confirm it meets statutory requirements,                manufacturers and industry standards 
•  why it is important to ensure there is access for sweeping and            inspection 
•  the importance of flue designation and how to check that the            flue is compatible with the appliance and its intended use 
•  why it is important to confirm that the ventilation requirements          meet the statutory and industry standards for the installation 
•  why it is important to make provision in accordance with                    statutory and manufacturer's instructions for an alert to the              release of carbon monoxide
•  why it is important to ensure permanent access to installation            data is available
•  why it is important to protect the area surrounding the work
•  how to work safely with, around and in close proximity to plant           and machinery
•  how to use work tools and equipment
•  how to work at height using access equipment
•  how and why operative care and maintenance of work and                 power tools and equipment is carried out
•  why it is important to ensure the end user understands the                correct and safe operation of the appliance in accordance with        statutory and manufacturer’s instructions
•  how to achieve good solid fuel appliance operating practice and      efficient combustion
•  how to identify suitable solid mineral and wood fuel and its                storage in accordance with manufacturer’s instructions
•  how to identify, report and resolve problems that could affect the      installation process 
•  how to complete all records and documentation in line with              statutory and organisational requirements
•  how to work safely with, around and in close proximity to plant          and machinery
K23 the principles of combustion to include
•  adequate fuel quality
•  combustion temperature
•  sufficient combustion air
•  combustion performance effects on emissions
K24 the principles of chimney flue draught and design
•  mechanical ventilation
•  natural flue draught (convection)
•  forced flue draught (mechanical)
•  effective flue height
•  effective flue area
•  impact of bends and restrictions
•  interaction with building envelope and topography
•  meteorological effects
K25 the importance of team-work and communication, organisational procedures with respect to site behaviours, and how to respond to inappropriate site behaviours
K26 the needs of other occupations associated with connecting solid fuel appliances to flue systems
P6 Allocated time
K27 the programme of work to be carried out including the estimated and allocated time and why deadlines should be kept
K28 the types of progress charts, timetables and estimated times and the organisational procedures for reporting circumstances which will affect the work programme


Scope Performance

Scope Knowledge





Organisational procedures
Insurances – public, product and employers liability, professional indemnity
Company documents
contract for the work, safety management plan, Construction Design and Management regulations, environmental policy, complaints procedure, information privacy and security policy, management structure
Work area
The area where the equipment will be installed and all areas affected by the work extending to topographical features and meteorological conditions
Services and systems
Chimney and flue systems, appliances, ventilation systems and appropriate utilities
Documentation and specifications
Manufacturers’ instructions for all equipment that forms part of the work
architect’s plans and site-specific documentation
local building rules and regulations
Party Wall legislation
Clean Air Act
Environment Act
Smoke Control Zones
Permitted Development
Conservation Areas
Heritage status
Areas of Outstanding Natural Beauty
Sites of Special Scientific Interest
specific requirements of insurance underwriters
Building regulations in England and Wales, particularly ADJ but also ADA, ADB, ADF, ADL and AD7
Building Standards Technical Handbook in Scotland
Technical Booklets in Northern Ireland, particularly B, D, E, F1, F2, K and L
BSEN’s particularly 8303, 15287, 1856, 16510, 1251, 3376, 4834, 12815, 13229, 13240, 15250
Note: Technical and BSEN documents may be withdrawn or superseded during review programmes, it is therefore important to check the currency and validity of all such documents to ensure the correct version is being referenced.
Solid fuel burning appliances up to 50kW output including but not limited to the following:
•  open fires
•  free standing room heaters
•  inset room heaters
•  free standing cookers
•  independent boilers
•  slow heat release stoves

Links To Other NOS

External Links

Version Number


Indicative Review Date

31 Dec 2027





Originating Organisation


Original URN


Relevant Occupations

Construction and Building Trades nec

SOC Code



Heat shields; Fire cement; Carbon monoxide; Solid fuel; Flue designation