What is 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 coming in as well as reducing wind noise, energy bills, CO2 emissions and any debris that may fall down your chimney.

Extension Rod
A chunky 6" extension rod to lengthen the handle on...
Rectangle 16″ x 6″
Packaging incs : chimney sheep, handle & extension rod
Rectangle 16″ x 9″
Packaging incs : chimney sheep, handle & extension rod
Rectangle 20″ x 08″
Packaging incs : chimney sheep, handle & extension rod
Rectangle 20″ x 12″
Packaging incs : chimney sheep, handle & extension rod
Round 08″
** NOT suitable for standard 8" chimney pots - use...
Round 10″
Suitable for standard 8"- 9" round internal diameter chimney pots....
Round 12″
Suitable for a 10" round internal diameter chimney pots. Packaging...
Square 13″
Suitable for a 10"-11" square chimney openings. Packaging incs :...
Square 18″
Suitable for a 15"-17" square chimney openings. Packaging incs :...

Perfect fit

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.

Natural ventilation

Wool is breathable so no gap is needed, making a Chimney Sheep® very efficient. Once inserted into your chimney flue Chimney Sheep® acts like a duvet, blocking 95% airflow into and out of your chimney, permitting sufficient ventilation.

Keeps warm air in

By blocking the majority of the air flow, it prevents the stack effect occurring. 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.

Without Chimney Sheep®

  • 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

With Chimney Sheep®

  • 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!
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.