to Plug a 8" or 9" Round Chimney Flue – Chimney Sheep Wool Wood Stove & Fireplace Draft Stopper Plug Excluder – Save Energy Block Smell & Debris – Better Than Inflatable Pillow Balloon

Let's just deal with the elephant in the room first - this thing seems stupid expensive for what it is. I mean, 50 bucks for a circle of fabric with a cheap plastic handle, wth?But I will say this: it works, bigtime, and for a tiny fraction of the cost of getting a chimney repairman to try to replace a leaky damper.The fabric circle is really a super-heavy-duty, all natural, woven sort of felt from, they claim, special sheep with really dense wool. I can't speak to that but I'll admit that I've never seen anything quite like it.Despite its thickness and solidity, though, it was not terribly difficult to trim up with heavy shears. Note: DO NOT attempt to make an exact fit! You want it to be a little big, so it'll squish into the flue and stay there from friction.I also had to cut a perpendicular slit to allow the damper control rod to pass through. This, too, was no big deal.And the result? Not only did all chimney drafts immediately cease, but the family noted a great improvement in allergies! Maybe pollen was blowing down the chimney along with the cold air? Or maybe they're allergic to whatever soot or ash the draft carried with it?Whatever - the cost of this gadget will pay for itself with a few less bottles of allergy meds, to say nothing of the cost of however much heat was vanishing up the flue.You do have to be a bit handy, detail-oriented, and flexible to crawl around upside down in your fireplace. Obviously make sure the fire is long out, and the fireplace is as clean as you can reasonably get it first. You're still going to get a bit dirty but it shouldn't be Dickensian. The results will be worth it.

I have a woodburning pre-fab fireplace that I never use in a family room. The chimney had a chimney cap damper that could be closed but it was damaged last year by a falling branch during a storm and the way the chimney was repaired no longer allowed for a closing cap. So I noticed that the room was much colder than usual even though I had good fireplace doors. The problem was when the furnace kicked on the system would pull cold air into the room through the fireplace doors. The room is now a good 10 degrees warmer in the morning when it's below freezing outside. The flue damper works better than the chimney cap one did.I got the 10 inch round version which fit properly for the purpose but I didn't measure. Just eyeballed the size and found out that having it a little larger than the chimney pipe's hole worked well. The only issue I had was the rod provided is only one foot long so I had to reach up into the chimney to stuff the damper in place. I did have to reach up with a stick to make sure the coverage inside the chimney pipe was smooth without bunching. I didn't need to trim the wool material. The remedy for the short rod was buying a couple of extensions that are also available on Amazon to double the length.

The concept here is simple enough - open the damper and stuff this nice insulated wool to stop the cold winter drafts. The sheep wool feels like great quality and it actually does make a significant difference in reducing the draft, but man $45 for some insulation on a stick is a tough pill to swallow.Unfortunately I couldn't find any alternative that looked comparable in the construction, so I suppose you get what you pay for, and in the grand scheme of things this lets me save money from my heating bill on a monthly basis so it probably pays for itself. Still though I feel like I had to do some mental gymnastics to justify the purchase.

If you have an older home and the flute cover doesn't seal well, then you may find this item as the right choice. For me personally it drastically cut down on the draft a great amount to the point I was no longer feeling any air draft coming from it.I did however buy a size larger then I needed but was able to cut it down to fit perfectly. So if you wanna save on your heating or a/c bill this is a great choice over using the ballon option as you don't need to be filling it up with air from time to time.The difference was immediately noticed.

We use this flue-blocker in combination with a chimney balloon and can’t be happier. No more draft! Easy to install.

This is far superior to the black towel that was plugging the chimney flue when we bought the house! The pipe has an irregular diameter, but this was able to fit perfectly anyway. It's nice and thick, and I haven't felt any kind of draft when I've walked by. It was incredibly easy to install. I would absolutely recommend this product!

I had to cut this down to size but it was easy to do with a good pair of scissors. It's extremely effective at blocking not only drafts but cuts down on sound transmission from outside substantially as well. It's made a big difference in both summer and winter months, I wish I'd bought one of these much sooner.

The description said this works in 8" chimney vents, and it does... if you wedge it in and fold it on itself. Nothing resembling a seal at all.