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Chimney Sheep® Chimney Draught Excluder – Oblong 9″ x 16″ (23cm x 41cm)

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Chimney Sheep® Chimney Draught Excluder – Oblong 9″ x 16″ (23cm x 41cm)

(28 customer reviews)


A Chimney Sheep® is a highly efficient, removable chimney draught excluder made from felted Herdwick sheep’s wool. Our original and best-selling product ensures your home is heated efficiently by keeping the heat in and the cold draughts out.

We think a Chimney Sheep® is a no brainer! Why? Here are a few reasons:

  • Reduces your energy bills by up to £60 per year on average
  • Reduces your carbon output by about 250kg of CO2 per year
  • Stops wind noise coming down through the chimney
  • Stops wildlife and debris falling into the hearth
  • Works in the summer to keep your house cool
  • Reduces air pollution entering the home
  • Has industry reassurance as the only chimney draught excluder to hold a BBA certificate
  • Made in the UK at our factory here in Maryport using Herdwick wool collected during our Operation Wool project
  • About 20% of the profit goes towards planting trees through our Community Interest Company, Buy Land Plant Trees

This size is suitable for chimneys that are 6″ – 9″ deep (150 – 225mm) by 10″ – 15″ wide (250 – 380mm). Make sure the Chimney Sheep is an inch or two bigger on each dimension than the chimney you are fitting it into. It comes with a 6″ handle and 6″ extension rod, giving 12″ of reach altogether. If you’re not sure what size to get, have a look at our sizing chart.

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How does a Chimney Sheep® draught excluder work? 

A Chimney Sheep®  draught excluder is made from highly durable and naturally breathable Herdwick wool, from a Herdwick sheep. The wool is treated with a unique ionic protect plasma which makes it 100% moth proof and aids with the longevity of the Chimney Sheep® (we have customers that have had the same ones for nearly 10 years!). It is then felted to create a unique flexible yet sturdy material. This makes the Chimney Sheep® perfect to plug the gap just above a fireplace.

The woollen pad of the Chimney Sheep® compresses to fit perfectly flues of all shapes and sizes making it far more efficient than any other chimney draught excluder on the market.  Inflatable chimney blockers and chimney umbrellas require a small gap to be left in your flue to allow ventilation but because wool is naturally breathable, a Chimney Sheep® doesn’t require that gap. Instead, once inserted into your chimney flue the 4.43 tog rated Chimney Sheep® acts like a duvet, blocking 95% airflow into and out of your chimney, whilst naturally permitting sufficient ventilation. It works to prevent warm air from escaping up the chimney and stopping cold air from coming in via the chimney when not in use, reducing the ‘stack effect’ phenomenon.

It is as simple as that! Read more about the stack effect and how a Chimney Sheep® works here. 


What are the benefits of using a Chimney Sheep® draught excluder?

The list is endless but here are a few of the main benefits:

  • Reduces your energy bills – a Chimney Sheep® stops about 5% of your household heat from escaping, reducing your heating bill by about £60 per year on average. You can estimate how much your home might save in energy costs by using our savings calculator.
  • Reduces your carbon footprint – a Chimney Sheep® makes your heating more efficient, reducing your CO2 output by up to 250kg per year.
  • No more wind noise – say goodbye to those horrendous howling winds coming through your chimney by plugging it with a Chimney Sheep® (you can turn your TV volume back down now…).
  • Stops wildlife and debris falling in – no more surprises in the hearth, a Chimney Sheep® will catch it all and stop your curious cat getting stuck up the chimney too!
  • Works in the summer – a Chimney Sheep® prevents hot air from entering your home and retains air-conditioned air, keeping your house cool in the summer.
  • Reduces air pollution in the home – a Chimney Sheep® reduces the number of air changes in a property so considerably reduces the amount of air pollution that enters the home.


Does a Chimney Sheep® REALLY work?

It really does! Don’t take our word for it, here is all the evidence:

  • We are the only chimney draught excluder to have a BBA Agrément Certificate. The achieve this the Chimney Sheep® had to go through numerous laboratory tests, on-site evaluations, quality management checks and product inspections, over several years, passing all the assessments to gain the award. The BBA is a worldwide credible industry body and the certificate means that Chimney Sheep® are recognised by building control, government departments, specifiers, and insurers as meeting the BBA’s standards of quality, safety and reliability. It provides you and them with reassurance of the product’s fitness for purpose.
  • Rigorously tested by BSRIA and University of Liverpool which showed that a Chimney Sheep® will stop around 5% of household heat from escaping and therefore save users around £60 off the heating bill per year, per chimney and up to 250kg of CO2 per year chimney, working to reduce energy bills going into winter.
  • Hailed as one of Grand Designs host, Kevin McCloud’s ‘Green Heroes’.
  • DIY Doctor 5* review – read the full review, here.
  • Chimney Sheep® has been featured in the press quite a bit too, from the likes of The Guardian, The Times, Good Housekeeping and Ideal Home. You can have a look at some of the latest articles we’ve been featured in here.


Are Chimney Sheep® sustainably made?

Absolutely. We are really passionate about the environment and sustainability. Everything from our sourcing of wool to our packaging is chosen with the environment in mind and the aim of our reducing our carbon footprint as much as we can.

All Chimney Sheep® are made here in our factory in Maryport, Cumbria, using Herdwick wool sustainably sourced from farmers around Cumbria. We collect the wool once a year which we call our ‘Operation Wool’ project. We pay the local farmers a fair price for this which is usually more than the market price and helps to support them.

The felt head of a Chimney Sheep® usually lasts about 10 years and is 100% wool which means it is completely biodegradable and compostable. The handles are made with recyclable plastic therefore are extremely durable and designed to last for decades. We have designed them so that when the felt head does wear out, you can just replace it with a new felt head and keep the same handle to reduce waste and the use of excess plastic. When the time comes and you have to say goodbye to your felt head, get in touch with us.

By using a Chimney Sheep® you are doing your bit to reduce your carbon footprint and we are really passionate about helping you to reduce your CO2 output even further. That is why we have set up our very own Community Interest Company, Buy Land Plant Trees, so that with each purchase a proportion of the profits will go towards planting trees on agriculturally poor land. Fancy reading some more about Buy Land Plant Trees? Click here!


How do I work out what size of Chimney Sheep® I need?

All you need to do is measure your chimney. We promise, it sounds more complicated than it really is! Head over to our simple instructions which walk you through it. If you do have any trouble though, just get in touch and we can help.

Our standard Chimney Sheep sizes will fit the majority of chimney flues. However, each and every chimney (like us!) is unique so if your chimney doesn’t look like it will fit one of our standard sizes, contact us with the measurements and we will give you a quote for a made-to-measure Chimney Sheep® that will fit your chimney perfectly.

28 reviews for Chimney Sheep® Chimney Draught Excluder – Oblong 9″ x 16″ (23cm x 41cm)

  1. Alex Vignes

    Better than old newspapers!

    It’s not a perfect fit – the front part is squashed so it wrinkles up and allows some air through, but it’s better than screwed up old newspaper!

  2. Colin shaw

    Brilliant simply Brilliant

    Well what can i say this product is amazing not more plastic bags shoved up the chimney. Very impressed. A good snug fit and stops drafts and muck coming down. Highly recommended.

  3. Denise McCarthy


    Great quality product, helpful measuring guide and quick delivery. Can really feel the difference in terms of effective draft blocking compared to our old chimney balloon which was pretty useless. Will definitely be recommending these to friends.

  4. Peter

    Nice product!

    Nice to find a product that actually works like the makers claim!

  5. Mike O’Brien-Ball

    Perfect solution

    Chimney sheep easy to measure for, easy to fit – job done. I have 2 unused open fireplaces in bedrooms. Both topped with a pepper pot cowl. The chimney sheep has stopped draughts and falling soot and debris. Also, to my surprise, the massive problem I used to have with Woodlice seems to have stopped as well. I could never understand why I had so many woodlice, seems the chimney might have been their access point. Can’t wait to try the anti slug product in the garden next.

  6. Ajay handa

    Great idea easy to use

    Great idea and works a treat. No more chimney dust and debris in my dining room

  7. dennis brown

    Does the job.

    Does the job , no more soot on the hearth, and it’s keeping the draughts at bay.

  8. margot marment

    Fabulous way to avoid those unexpected birds getting in

    I find this invaluable in non fire season to keep out drafts birds

  9. chalk

    Good quality

    easy to install

  10. Amazon Customer

    quality of product which is very good

    has made a big improvement, not 100% but certainly 90%, the missing 10% may be down to my installation rather than any problem with the product

  11. Roxana

    Good quality

    Good quality, very happy with the product and room feels less draughty or cold.

  12. MARIAN 654

    Added to my flock of sheep.

    Feels better to use natural products other than plastic .Not been very windy since insertion but definitley has reduced draft from chimney.

  13. John K

    Good product

    Fits perfect, draughts gone!

  14. Miss J. Girardi

    Great Chimney Sheep

    Such an easy item to immediately remove draught! Much needed as the time of year and arrived next day as promised! Excellent!

  15. pauline

    Stops draught

    Living room does feel a bit warmer, and when heating goes off the room stays warmer for longer .

  16. emma o rourke

    Warmer sitting room

    I bought this item about a month ago and find it fantastic, it does what it says on the tin, u do notice less noise from outside and our living room is allot warmer holding the heat in.

  17. joan dowling

    Easy to fit true to size

    Easy to fit and remove
    Does a great job of reducing drafts

  18. MP

    Warm and toasty room!

    Great natural product, easy to install. Our dining room is now warm and cosy

  19. C. Barrett

    ewe are great

    great wish I had bought one years ago. no more draughts.

  20. CHRIS

    A useful device

    This item has worked well for us so far, but time will tell. Fairly easy to fit but our chimney was a little bit obstinate at first. Very pleased overall.

  21. Peter H.

    It works

    Much better than the baloons we had tried previously

  22. Larrson

    Living room is nice and cosy now not loosing any heat

    Saves the drought coming down the chimney

  23. Graham Rouse

    Great when it’s in!

    I bought this because I couldn’t close off our bedroom fireplace. It was draughty and if we had a fire downstairs we got fumes upstairs. It wasn’t really suitable for a balloon so I bought the sheep. I had a proper 10 minute wrestle with it to get it in including breaking one of the handles. However now it’s in I’m really happy with it. Fortunately I’m not planning to use the upstairs fireplace so it’s never coming out!

  24. sona

    it protects from dust coming through chimney

    this is wonderful product

  25. Toot’s

    Easy to use.

    Delivery was very swift. The item is very easy to install and does what it says on the tin. Great.

  26. Artychick

    Cracking chimney sheep

    Does exactly what it is supposed to. No more drafty fireplace

  27. MandieL

    Useful design

    Solid, well designed, does the job.

  28. Ralph, London

    Simple but effective

    Initial measuring of flue size with head in the grate and phone torch balanced on chest was a gritty experience! However size guide was helpful and Abbie at Chimney Sheep was great. Our sheep is now fitted with accessory Herdwick sheep dangle. Very happy. On reflection, I should have bought a couple of extension rods to make future removal and fitting even easier.

    Chimney Sheep® Chimney Draught Excluder - Oblong 9" x 16" (23cm x 41cm)
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