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Chimney Sheep® Chimney Draught Excluder – Round 8″ (20cm)

FREE delivery on all UK orders over £25!

Chimney Sheep® Chimney Draught Excluder – Round 8″ (20cm)

(37 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 £99 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 small flues up to 7″ (177mm) in diameter.  A round sheep will also happily fit an oblong, square, or trapezium chimney opening. This size is suitable for flues with a corner to corner measurement of up to 8″ (150mm). 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 £99 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 from 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 the University of Liverpool which showed that a Chimney Sheep® will stop around 5% of household heat from escaping and therefore save users around £99 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!

37 reviews for Chimney Sheep® Chimney Draught Excluder – Round 8″ (20cm)

  1. Rhona Nicholl

    Chimney sheep 8 inch & 10 inch

    I bought 2 sheep. One for an old boiler chimney & one for our fire place.
    They are a fantastic job. The draughts are gone and so easy to work with. I probably should have bought 2 extension rods instead of 1 as my wee sheep dangle is bearly visible, but that’s my bad.

  2. Ben Coplestone-Crow

    Excellent customer service and shipping really efficient. Great communication and a genuine willingness to help.

    Unfortunately, the Chimney Sheep itself is disappointing. Bought for its wind noise-reducing potential, the product was barely effective at all. After several unsuccessful attempts at wind-proof installation, the sheep was eventually used merely to indicate the presence (in the flue) of a rolled up cushion contained in a plastic bag, which proved wholy satisfactory!

    Sorry Chimney Sheep – I sooo wanted to praise the product!

    The Robin bird-boxes (in same order) are absolutely chafing, though!

  3. Heather

    Stops the noise and draft

    Such a simple but effective idea. We had to cut the sheep down an inch or so as the flue is only 5 inches diameter and I’d order the 8 inch. So easy to install and what a difference. The whistling noise has subsided and the draught has gone. Thank you chimney sheep. Its good to see that wool from local sheep is being used instead of wasted.

  4. Cath Scallon

    An outstanding product.

    Due to being a complete numpty, I mistakenly ordered a size smaller than my measurements indicated (a realisation prompted by a very helpful customer service person). However, despite the fact the Chimney Sheep is slightly too small, I still have to give it 5 stars, because the reduction in wind noise and draughts has been really dramatic, even with a little gap either side due to the wrong size. There has also been an improvement in the transmission of noise from next door: we live in a semi and our chimneys are back to back.

    Having had perpetually cold feet due to chimney draughts swirling around at floor level, I’m delighted by my newly cosy toes.

    It’s easy to fit and remove, which is great if you want to use your open fire from time to time.

    I can’t wait to order the right size, because it can only be even better!

  5. Jeffrey Lock

    Simple but very effective

    This has made a far bigger difference than I expected to our lounge which has a double sided fireplace right down the middle. We tend to use the fire from time to time in the winter with a “Firelog” although mainly for aesthetics rather than as a heat source. This simple but effective device allows us to keep the chimney closed for the majority of the time that it is not in use and the hanging tag on the chimney sheep means that you are not likely to light the fire while the sheep is in place. From a heating bills point of view, I can see that it is also significantly reducing the heat loss in the lounge so I expect it to quickly pay for itself. Very pleased.

  6. Jane Leathley

    Superb product!

    Superb product – so simple, so effective, arrived promptly. Easy to fit (and remove when you need to) one added bonus was I hadn’t realised how much noise came down my chimney along with the draught, so quieter as well as comfier evenings.

  7. Graham

    Simople, effective, well-designed: a low-tech winner!

  8. PS

    'Sheared' brilliance!

    Waiting for a new fire to be installed for the past couple of months. As the weather has significantly cooled down, the central heating in the living room was literally being sucked out. I inserted the Chimney Sheep, and the problem has been resolved!

  9. Natalie

    Quality product!

    My delivery arrived quickly and the Chimneysheep does exactly what it is meant to. I bought an 8” for a 5” flue and it fits perfectly! The drafts have gone, my lounge is much warmer and the heat doesn’t go as soon as the heating goes off , I’m thrilled with this product, I would highly recommend!

  10. Kathryn O’Donnell

    Great improved warmth & reduced noise

    So far so good, arrived quickly & easy to install. Definitely reduced noise & improved warmth

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