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990-WNWD-I03-020317
Fig 1: Chimney & flue performance
LOW FLUE DRAUGHT SYMPTOMS: DIFFICULT TO LIGHT AND SMOKE COMING INTO THE ROOM
CAUSE
REMEDY
Cold chimney
Line the chimney
Chimney too short
Extend the chimney
Down draught
Relocate/extend chimney terminal. Fit an anti-down draught
cowl.
Chimney diameter too large
Line the chimney
Chimney obstruction
Clear/sweep the chimney
Restricted air supply
Check for competing draughts (other chimneys, extractor
hood/fans). Fit an air vent if the room is sealed.
HIGH FLUE DRAUGHT SYMPTOMS: FIRE DIFFICULT TO CONTROL, FUEL WILL NOT LAST, COOKER
TOO HOT, APPLIANCE DAMAGE, AND CHIMNEY FIRE.
External wind conditions
combined with chimney
terminal.
Fit stabiliser cowl. Fit flue draught stabiliser.