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GUIDE TO FLUE
INSTALLATION
& REGULATIONS
There are many dierent regulations relating to flues and ventilation.
This document will not cover all of them but assist in obtaining information and
guidance, and provide useful and practical information.
This guide looks at common standards used to determine the requirements for flue and ventilation installation
requirements and should not be used as a sole reference for flue regulations. Please also remember to use the
installation and service manual for specific guidance for each boiler and to refer to the relevant standards.
BS6644
Specification for the installation and maintenance of gas-fired hot water boilers
of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases).
In IE refer to I.S. 820.
IGEM UP10
Installation of flued gas appliances in industrial and commercial premises.
Building Regs Part J Combustion appliances and heat storage, gives advice on how to comply with
Building Regulations.
Clean Air Act
A UK Parliament Act passed in response to London’s Great Smog of 1952.
(1956 Amendment)
The Act introduced a number of measures to reduce air pollution, especially by introducing ‘smoke control areas’ in
some towns and cities in which only smokeless fuels could be burned. By shifting homes’ sources of heat towards
cleaner coals, electricity, and gas, it reduced the amount of smoke pollution and sulphur dioxide from household
fires. Reinforcing these changes, the Act also included measures to relocate power stations away from cities, and
for the height of some chimneys to be increased.
The Act was an important milestone in the development of a legal framework to protect the environment.
Although smog is no longer an issue, more recent editions of the Clean Air Act have maintained control of
emissions and heights of flues.
COMMERCIAL BOILERS (70kW – 1.8MW)
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