The right chimney flue cover depends on where the opening is and what it needs to do. For a 4- to 8-inch interior flue hole, the 6719900 replacement covers are the closest match; the white Irnyso model specifies an adjustable anchor system. For an outdoor flue, choose a roof cap sized for the chimney opening instead. The options below include both types, so check the product’s intended location and measure the opening before choosing.
| Product | Best suited for | Listed size or fit |
|---|---|---|
| 6719900 Replacement Cover | Replacing a compatible interior flue cover | 4 to 8 inches |
| Adjustable Black Flue Cover | A black finish for an interior opening | 4 to 8 inches |
| 9 x 13-Inch Outdoor Chimney Cap | Covering an exterior single flue | 9 x 13 inches |
| LTSEAME Stainless Steel Cap | An adjustable square exterior cap | 7 x 7 to 11.5 x 11.5 inches |
| Irnyso White Flue Cover | A light-colored interior cover with adjustable anchors | 4 to 8 inches |
6719900 Chimney Flue Replacement Cover
Best for: Buyers replacing a compatible Imperial-style interior flue hole cover. The listing identifies a 4- to 8-inch fit and names replacement models BM0026 and BM0353, making this a practical option when those size and model details match the existing opening.
Why it was selected: Its stated range covers several common opening diameters, and the replacement-model references give buyers specific details to compare against an existing cover. Use the listed fit rather than relying on appearance alone.
Limitation: The supplied product information does not specify a finish, installation instructions, or the exact adjustment mechanism. Confirm those details with the listing if they matter for your installation.
Adjustable Black Flue Hole Cover
Best for: Buyers looking for a black interior cover for a 4- to 8-inch furnace tube opening. Its title also identifies it as a 6719900 replacement and lists BM0353, which helps shoppers compare model references before ordering.
Why it was selected: This option combines a stated adjustable diameter range with a black finish. Choose it if the opening size, replacement reference, and appearance suit the installation.
Limitation: The listing title mentions BM0353 but does not provide detailed material, adjustment, or installation specifications. Do not assume that a model number alone guarantees a fit; measure the opening and check the product details.
9 x 13-Inch Outdoor Chimney Cap
Best for: Homeowners seeking an exterior cover for an existing single flue with a 9-by-13-inch size. The listing describes a roof rain guard with a screen, hood, and plate, so it serves a different purpose and location from an interior decorative hole cover.
Why it was selected: It gives buyers an outdoor option when the concern is covering a roof-level flue rather than closing an unused wall opening. Match the listed dimensions to the existing flue before choosing it.
Limitation: This is not presented as a replacement for a 4- to 8-inch interior flue hole cover. Its fit is described for an existing single flue; verify the mounting arrangement and measurements for the chimney.
LTSEAME Adjustable Stainless Steel Chimney Cap
Best for: Buyers who need an adjustable square outdoor cap and whose chimney dimensions fall within the listed 7-by-7-inch to 11.5-by-11.5-inch range. Its stainless steel construction and adjustable metal strips distinguish it from the interior covers in this roundup.
Why it was selected: The listing describes long bolts and adjustable bars for fitting a range of chimney sizes. It also notes a mesh structure intended to support ventilation and smoke exhaust.
Limitation: Its stated size range is for square-style dimensions, not the 4- to 8-inch diameter listed for interior covers. Avoid choosing it for an interior wall opening or a chimney outside its adjustment range.
Irnyso White Adjustable Flue Hole Cover
Best for: Buyers seeking a light-colored interior cover with a stated 4- to 8-inch opening range. The listing gives a 9.4-inch diameter and 1.5-inch thickness, an almond-colored front and back, and replacement references 6719900, BM0026, and BM0353.
Why it was selected: The detailed dimensions and replacement-model references help shoppers compare the cover with an existing opening. Its adjustable anchors are described as keeping the stopper in place.
Limitation: The listing says manual adjustment is required for smooth or irregular flue holes. Buyers should check the opening’s shape and surface before assuming the anchors will fit securely.
Buying Guide: How to Choose a Chimney Flue Hole Cover
Is the opening inside or on the roof?
Start by identifying the location. An interior flue hole cover is generally selected to cover an opening in a wall or similar indoor surface. A chimney cap is installed at the exterior flue and is described by roof-level dimensions and features such as a hood, plate, or mesh. These product types are not interchangeable.
For a decommissioned or unused interior opening, compare the cover’s stated diameter range and mounting method with the opening. For a roof flue, compare the cap’s dimensions and mounting design with the existing chimney. If you are unsure whether the flue is active or what kind of cover it needs, consult a qualified chimney professional before closing it.
How should you measure the flue hole?
Measure the opening itself rather than relying only on an old cover’s label. For a round interior hole, record its diameter at the opening. For an exterior cap, measure the flue or tile dimensions and note whether it is square or rectangular. Compare your measurements with the exact range stated in the product listing.
- Check both the minimum and maximum diameter for an adjustable interior cover.
- For rectangular openings, record both width and length.
- For an exterior cap, confirm that its stated dimensions refer to the opening or mounting area you need to cover.
- Compare the product’s listed replacement model numbers with the existing part, but verify measurements too.
Should you choose an adjustable cover?
An adjustable cover can be useful when the opening falls within its stated range, but “adjustable” does not mean it fits every shape or surface. The Irnyso listing describes manual adjustment for smooth or irregular holes and anchors intended to hold the stopper. The black and 6719900 listings also state a 4- to 8-inch range, but the supplied details do not explain their adjustment hardware. Check the specific listing for instructions before purchase.
Which material and finish matter?
Finish can affect how an indoor cover looks against the surrounding wall or fireplace area. The options here include a black cover and an almond-colored white cover. The Irnyso listing describes a steel structure, while the LTSEAME exterior cap is described as stainless steel. Compare only the material and finish stated for the specific product; do not assume that similar product names indicate the same construction.
Outdoor products face different conditions from indoor decorative covers. The LTSEAME listing identifies stainless steel construction, while the 9-by-13-inch cap listing emphasizes its outdoor use and rain-guard design. Confirm the listed materials and installation details for the model you are considering.
What should you verify before buying?
- Product purpose: Determine whether you need an indoor hole cover or an exterior chimney cap.
- Dimensions: Match the opening’s size and shape to the stated fit range.
- Replacement references: Check listed model numbers such as 6719900, BM0026, or BM0353 against your existing part.
- Mounting method: Confirm how the product is adjusted and secured, especially for irregular openings.
- Ventilation needs: Do not block a flue that is still in use. The outdoor cap described here includes mesh intended to permit ventilation and smoke exhaust.
- Listing details: Review current product information for installation requirements and any details not provided in the summary.
Frequently Asked Questions
What size flue hole cover fits a 4- to 8-inch opening?
The 6719900 replacement covers and the Irnyso white cover are listed for 4- to 8-inch openings. Measure the opening and verify the specific product’s fit and mounting method before ordering.
Are chimney caps and interior flue hole covers the same thing?
No. An interior flue hole cover is intended for an indoor opening, while a chimney cap is an exterior component fitted at the roof-level flue. Choose based on the opening’s location and purpose.
Can I cover a flue that is still being used?
Do not install a solid interior cover over an active flue. The flue must remain capable of exhausting smoke and combustion gases. Ask a qualified chimney professional if you are uncertain about its status or requirements.
Does the Irnyso cover fit irregular openings?
Its listing says manual adjustment is required to adapt to smooth or irregular flue holes and describes adjustable anchors. Measure the opening and check the product instructions to determine whether its mounting approach suits the surface.
How do I choose between the two exterior caps?
Compare the shape and dimensions of your existing flue with each cap’s listed fit. The 9-by-13-inch option is described for an existing single flue, while the LTSEAME cap is adjustable from 7-by-7 to 11.5-by-11.5 inches.
Do replacement model numbers guarantee a fit?
No. Model references can help identify a possible replacement, but they do not replace measuring the opening and confirming the mounting method. Check both the listed references and the actual dimensions before buying.