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Discover the perfect Chimney Sheep® draught excluder for your home

When it comes to draught-proofing open chimneys, you can’t get better than a Chimney Sheep® chimney draught excluder. It is the only fireplace draught excluder on the market with industry reassurance via the BBA. It is an effective solution with exceptional insulating properties, helping to make your home warmer and more energy-efficient.

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What is a Chimney Sheep®?

A Chimney Sheep® is a removable chimney draught excluder made from highly durable, naturally breathable Herdwick wool. The wool is felted to create a perfect plug for the chimney and a handle added for easy insertion and removal. A Chimney Sheep® makes your home feel more comfortable by stopping warm air escaping and preventing cold air from coming in, whilst providing sufficient ventilation to prevent damp issues occurring. Installing a Chimney Sheep will make your home feel warmer, reduce wind noise, heating bills, CO2 emissions and prevent any debris fall down from the chimney into your hearth.


When inserted into an open chimney flue, the woollen pad of a Chimney Sheep® compresses to fit perfectly in flues of all shapes and sizes.

Other chimney draught excluders require a small gap to be left in your flue to allow ventilation. Wool is breathable so no gap is needed, making a Chimney Sheep® much more efficient.

A Chimney Sheep® stops warm air escaping through an open chimney and prevents cold air being pulled in via other gaps, helping a property retain its heat and feel more comfortable.

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Without a Chimney Sheep® draught excluder

  • An open chimney is likely to be the single biggest source of air loss in a home. It is comparable to leaving a window open all the time, except that the passage of warm air out is exacerbated by a phenomenon known as the stack effect.
  • Open chimneys will draw an average of 80 cubic metres of air out of a building per hour, more often than not it is warm air produced from our heating systems!
  • The volume of air that escapes needs to be replaced, so cold air is pulled in from other leaky parts of the building, such as keyholes, gaps around your doors and tiny gaps around your windows
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With a Chimney Sheep® draught excluder

  • A Chimney Sheep will reduce the amount of warm air being pulled out of your home, whilst still providing sufficient ventilation. Your house retains its heat!
  • Less hot air is leaving, so less cold air is pulled in! The result? A warmer, comfier, more energy-efficient home!
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How much will you save?

According to research conducted by the University of Liverpool, a Chimney Sheep® draught excluder will reduce heating bills by about 5%. Use our savings calculator to find out exactly how much you could save by installing a Chimney Sheep® in your property.

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How to measure for your Chimney Sheep®

To ensure that you get a Chimney Sheep® chimney draught excluder that works effectively, you’ll need to get correct shape and size. Measure your chimney flue using our simple instructions to ensure you get the perfect fitting draught excluder!

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