How do I determine the correct size for my fireplace flue?

Measure your flue's interior and choose a Flueblocker the same size or slightly larger. The wool pad pressure-fits and can be trimmed with scissors. Use the sizing guide to match your flue shape—round, square, or rectangular.

How difficult is installation? Do I need any special tools or supports?

Choose an install spot you can reach by hand. Measure with a tape or ruler. A narrow area above the firebox is ideal. For higher spots, use 6” handle extenders to place the wool pad securely.

Will the product completely block cold drafts, odors, and heat loss?

When fitted correctly, the FlueBlocker stops heating/cooling loss, drafts and odors from a dormant chimney. To eliminate odor, make sure you vacuum out all the ash from the firebox and seal any ash chute or outside intake attached to the firebox.

Which is right for my situation – a FlueBlocker or a Chimney Balloon?

The Flueblocker is a durable, reusable chimney plug that handles moisture and is ideal for long-term use. The Chimney Balloon offers a tight seal and a breakaway feature for safety if a fire is lit accidentally.

How durable is the material? Is it worth the price?

Chimney is harsh, moist, acidic environments. The Flueblocker uses coarse ionized Herdwick wool and durable resin hardware to seal air, wick moisture and resist odors. Chimney Balloons use a heat-reactive laminate to withstand chimney air conditions.

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for 13"x35" Chimney - Draft Stopper Wool Fireplace Plug

Product ID: 240089228

Details

Brand
Flueblocker
Color
Natural
Material
Wool
Maximum Gap Fill
13 inches
Product Dimensions
36"L x 14"W x

🐑100% Herdwick wool - natural & renewable

📏Fits up to 13"x35" flue - custom trim for perfect seal

🔥Blocks drafts & heat loss - IECC 2009 compliant

2658 kr

Duties & taxes included

In stock

Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Denmark.

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Description

🐑 Seal in warmth, block the chill—your fireplace’s new best friend!

SEASONAL SIMPLICITY - Installs and removes in seconds—just press in before winter, pull out before lighting your fire.
PRECISION FIT ZERO HASSLE - Pressure fits rectangular flues up to 13"x35" with easy trim-to-fit edges—no tools or adhesives needed.
ENERGY SAVING DRAFT BLOCKER - Seals out cold drafts, odors, and noise while locking in warmth, potentially paying for itself in one heating season.
SUSTAINABLE WOOL POWERHOUSE - Crafted from dense Herdwick wool, this plug offers eco-friendly durability that lasts 10+ years.
TAX CREDIT ELIGIBLE CHIMNEY PRO APPROVED - Qualifies for federal tax credits and recommended by energy auditors for wood-burning or unused fireplaces.

The Flueblocker 13"x35" Draft Stopper is a premium, reusable chimney plug made from 100% natural Herdwick wool. Designed for rectangular flues, it pressure-fits snugly to block drafts, odors, and heat loss, improving home energy efficiency and comfort. Easy to install without tools, it’s backed by a 1-year warranty and may qualify for federal tax credits, making it a smart, sustainable upgrade for seasonal or unused fireplaces.

Specifications

ASIN	B08K1J95ZT
Best Sellers Rank	#210,409 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #13 in Fireplace Chimney Caps
Brand Name	Flueblocker
Color	Natural
Customer Reviews	4.4 4.4 out of 5 stars (424)
Global Trade Identification Number	00852586007252
Item Dimensions L x W x Thickness	36"L x 14"W x 1"Th
Item Weight	2.6 pounds
Manufacturer	Chimney Sheep
Manufacturer Part Number	FB13x35REC
Manufacturer Warranty Description	1 year limited warranty.
Material Type	Wool
Maximum Gap Fill	13 inches
Model Number	FB13x35REC
Number of Items	1
Number of Pieces	1
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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2658 kr

Duties & taxes included

In stock

Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Denmark.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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