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Cleaning the chimney is crucial for home safety, especially during the heating season. Regular inspections are recommended before winter to prevent fire hazards caused by soot buildup. Signs that indicate the need for cleaning include visible soot, cracks in the mortar, smoke odors, and smoke entering the room. Annual cleaning is advised for wood-burning chimneys, ideally before the heating season starts. If used daily, cleaning may be necessary twice a year. Gas chimneys require less frequent cleaning but should be inspected annually for leaks and blockages. Scandinavian homes maintain warmth through efficient stoves and airtight rooms.