Clean air act approval

The Clean Air Act 1993 introduced a wide range of new regulations which control smoke emissions, the height of chimneys, and the content and composition of motor fuels.

When specifying chimney heights, local authorities need to take into account a number of relevant factors.

Under section 14 of the Act, unless the height of the chimney has been approved by the local authority, it is an offence to cause or knowingly permit a furnace to be used to:

  • burn pulverised fuel
  • burn at a rate of 45.4 kg or more an hour any other solid matter or
  • burn at a rate equivalent to 366.4 kW or more any liquid or gaseous matter.

An application for chimney height approval must contain adequate information to enable the necessary calculations to be carried out. The local authority must consider an application for approval for chimney height for a furnace and give a written decision within 28 days of receipt, unless it is agreed in writing between us and the applicant that a longer period is allowed. If we fail to deal with the application within this time period, then approval without qualification can be given. 

Contact Scientific Services for further information.


Re Ltd Regulatory Services
2 Bristol Avenue
Tel: 020 8359 7995