A ‘cold plug’ in your flue can be an unexpected issue during the colder weather. It is an invisible plug of cold air that can form in your chimney when temperatures drop significantly, and the chimney is left to go cold. This can result in the flue being plugged, which pushes smoke back down and out of your stove.
It can occur overnight during a sudden drop in temperature when your stove is not on or when a clear chimney has not been used for a long time. Also, it’s more common to happen in a twin wall flue system as they can be more exposed.
There are measures you can take to limit the risk of a cold plug:
Ideally, you want to gently increase the internal temperature of your chimney to remove the cold air plug.
Your local HETAS Registered Installer or Sweep & Service Technician will be able to offer further seasonal tips when they complete your installation, annual service, or regular sweep.
HETAS Ltd
HETAS, Severn House, Unit 5 Newtown Trading Estate, Green Lane, Tewkesbury, GL20 8HD
HETAS
Severn House
Unit 5 Newtown Trading Estate
Green Lane
Tewkesbury
GL20 8HD
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