flueway

flueway

The clear space (free open area) for the passage of flue gases within a chimney.
References in periodicals archive ?
Accessibility To Flueways From Both Ends For Inspection And Cleaning Without Removing Entire Jacket
All chimneys and flueways should be cleaned and checked during the summer months to ensure they're free from debris and in full working order before the heating season.
The engineer will need to do a bit more than check the colour of the burners and clean the boiler flueways during the annual service.