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🐑🔥 Seal the warmth, ditch the chill—your fireplace’s new best friend!
The Chimney Sheep 12 x 20 Inch Wool Chimney Draught Excluder is a premium, breathable Herdwick wool plug designed to fit snugly into open chimneys, blocking 95% of airflow to prevent heat loss and cold drafts. Easy to install and remove without tools, it improves home comfort, reduces energy bills by about £50 annually, and lowers CO2 emissions. Made in the UK, moth-proofed, and reusable for over a decade, it’s a sustainable, cost-effective solution for winter warmth and draft control.



















| ASIN | B00G48ERWO |
| Best Sellers Rank | 18,635 in DIY & Tools ( See Top 100 in DIY & Tools ) 80 in Fireplace Accessories |
| Brand | Chimney Sheep |
| Brand Name | Chimney Sheep |
| Colour | Grey |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.6 out of 5 stars 747 Reviews |
| Global Trade Identification Number | 00700115980258 |
| Included Components | Chimney Sheep 12 x 20 chimney draught excluder |
| Item Dimensions L x W x Thickness | 51L x 30W x 2Th centimetres |
| Item Highlight | Fits Openings 8-11in Deep by 15-19in Wide, Breathable Herdwick Felt, Lifts Out in Seconds |
| Item Type Name | Chimney Draught Excluder |
| Item Weight | 367 g |
| Manufacturer | Chimney Sheep |
| Manufacturer Part Number | CSDE7 |
| Material | Wool |
| Material Type | Wool |
| Maximum Gap Fill | 1.08 Feet |
| Maximum gap fill | 1.08 Feet |
| Model Number | CA042 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Product dimensions | 51L x 30W x 2Th centimetres |
| UPC | 700115980258 700115980265 |
L**E
Great job
Really like this draught excluder. Keeps the draught out from our chimney really well. Didn't even realise it was needed but our living room door kept getting sucked in by the flow of air coming up the chimney. Anyway quick installation (wear gloves) and my word the difference it's made. No draught, more heat and quieter as well. Feels like good quality material as well. Recommend
A**R
Works with kinks
First thing - good product, well made and it works. Two things to consider 1. Positioning it right - it's hard to tell when it's really well positioned and completely covers the opening. It's never going to be sealed off, but to come close requires a bit of fiddling. 2. It's can be a dirty job - usually there will be some soot dropping down as you adjust it. Also, if you want to use the fireplace, this has to come out - and that of course comes with a lot of soot. If not careful and ready for it, it can make quite a mess. In the end, I had a sheet of acrylic cut to size to cover the front of the fireplace. I put some soft draft excluder tape in the right places and this works really well - with a plus that if we want to use the fireplace, it's easy and clean job to remove the cover. It makes a huge difference what used to be the coldest room now is as good as any other in the house.
G**L
Very effective
A very effective device I didn’t realise how much heat I was losing until I fitted this chimney draft control the room is so much warmer.
S**M
Chimney Sheep - great idea
Great product does exactly what it says, we put it up our chimney before we blocked it over, just to keep noise, wind etc from coming down.
F**3
Worth purchasing
I was considering buying a chimney balloon as the chimney is open and there was a draft in the room which isnt very eco friendly. Saw the reviews about them needing to be reinflated a couple times a year and i didnt like the sound of that. The sheep is easy to fit in the chimney and stays in place. Noticed straight away that there was no chill around the fire place and the wind whistling through the chimney has reduced. So in summary, its more expensive than a chimney balloon, but its super easy, low maintenance and does a great job.
M**1
Chimney Sheep
I’m reviewing the chimney sheep that has been in position for 2 weeks now. It is a great draught excluder and does its job very well. No draughts in our lounge now. However, I feel it’s important to know that our homes are so well sealed with double glazing etc, that the chimney is the only form of ventilation for our bungalow, so it’s solved one problem but caused another! Condensation! My windows are dripping every morning. So, my solution is to place my sheep up the chimney each evening while we are using the lounge and remove before bed! May just be my problem but thought I would mention it as it may help others.
F**R
Superb
Makes a huge difference to the heat and heating in my house
S**N
It's in. Impossible to know if it's working 😅
Have an awkward elephants foot style chimney so went with a 12 x 20" and placed it just over the chimney mouth. Fits pretty well and wind noise is somewhat reduced. I don't really notice a difference in room temperature or retention of heat if I'm honest.
S**.
necessario utilizzare dimensioni maggiori
Idea interessante ma forse necessario acquistare misura parecchio superiore alle dimensioni della canna fumaria altrimenti dopo due volte che viene inserito , non tiene.
V**E
Fonctionne très bien
Fonctionne très bien chez moi, le conduit est obstrué comme il faut.
D**W
No more burnt fire place smell
A little difficult to finagle but helps. It gets a little messy but seems to do the job. I have noticed I do not smell the burt fire place smell caused by the draft.
R**K
Good product but installation may not be simple
I love the idea of this product. I went to their website with my chimney flue measurements (square opening) and picked the one recommended. I installed it and after some work was able to get it to more or less seal. A few days later I noticed the draft was back. After some more looking around it had caved in on one side. After some more work i got it to more or less seal again. It seems to be holding after about a week. Overall I think this is a good product but it may not be as simple as just shoving it up the flue (YMMV).
M**X
fonctionnel/efficace
fonctionne bien
Trustpilot
1 day ago
3 weeks ago