Window replacement air supply to combustion appliances

Part J

Existing windows with a permanent ventilation facility that is required to give air supply to combustion appliances should be maintained and be made no worse as a result of a replacement glazing installation.

All buildings

Combustion appliances including some cookers, fires and boilers that draw air from the room in which they are located require a permanent air supply to ensure that they work efficiently and safely.

Following any replacement glazing installation the provision of permanent air supply previously provided by an existing window should be not less than that provided by the existing windows or the current minimum standard, whichever is the lesser.

Typically accepted standard – current requirements

Please contact the Building Control Team for further guidance.