For a wood stove or fireplace, choose a purpose-built chimney liner rather than general-purpose flexible aluminum ventilation ducting. The Fireside Chimney Supply 6-inch kits are the relevant flexible liner options here: choose the 15-foot or 20-foot version based on the measured chimney route. The VIVOSUN and AC Infinity ducts are intended for ventilation, not stove exhaust, while the Imperial product is an adjustable elbow rather than a flexible pipe.
| Product | Best suited for | Important distinction |
|---|---|---|
| Fireside 6-Inch x 15-Foot Kit | Chimney routes that fit its listed length | Flexible stainless steel chimney liner kit |
| Fireside 6-Inch x 20-Foot Kit | Longer chimney routes that fit its listed length | Flexible stainless steel chimney liner kit |
| AC Infinity 6-Inch Aluminum Duct | Ventilation installations | Not identified as a stove chimney liner |
| VIVOSUN 6-Inch Aluminum Duct | Fan and air-circulation systems | Not identified as a stove chimney liner |
| Imperial 6-Inch Adjustable Elbow | Vent routes needing an elbow | Elbow fitting, not a flexible pipe |
Fireside 6-Inch x 15-Foot Chimney Liner Kit
Best for: Buyers who need a 6-inch flexible chimney liner and whose measured installation route is compatible with a 15-foot liner. This is the closest match in the list to a flexible stove-pipe search because the product is described as a stainless steel chimney liner kit, not ventilation ducting.
The listed liner is made from 316 stainless steel and has a .006-inch thickness, 7-ply seams, and 10 corrugations. The kit includes a 13-by-13-inch top plate with rain cap and an appliance connector for vertical hookups. These listed components make it a more complete chimney-liner package than buying flexible duct alone.
Why it was selected: Its 6-inch diameter, flexible construction, and chimney-liner purpose are directly relevant to wood-stove venting research. The manufacturer also describes the liner as designed to support airflow and combustion in compatible applications.
Important limitation: A 15-foot length may not suit every chimney. Verify the required route, appliance instructions, and local code requirements before purchase; do not treat this as ordinary HVAC duct.
Fireside 6-Inch x 20-Foot Chimney Liner Kit
Best for: Buyers whose chimney route calls for a longer 6-inch flexible liner than the 15-foot kit provides. It has the same stated liner material and included components as the shorter option, with a listed length of 20 feet.
The product features describe a 316 stainless steel liner with 7-ply seams and 10 corrugations. The kit includes a 13-by-13-inch top plate with rain cap, a .006-inch-thick liner, and an appliance connector for vertical hookups. These details help distinguish it from flexible aluminum duct made for moving air in ventilation systems.
Why it was selected: It gives buyers a longer listed length in the same chimney-liner product family. Choose this version if measurements show that the 20-foot option is appropriate; a longer liner is not automatically a better fit.
Important limitation: Confirm the actual chimney path and installation requirements before selecting a length. The listing information does not establish suitability for every appliance, chimney configuration, or local code.
AC Infinity 6-Inch Flexible Aluminum Duct
Best for: Ventilation projects that need an 8-foot, 6-inch flexible duct for applications such as HVAC, dryers, grow rooms, or tents. Its steel-wire spiral structure is listed as flexible and useful for installation in hard-to-reach places.
The product has a four-layer design that the listing says improves resistance to leaks, tears, and cuts. Those features may matter when routing ventilation duct through a confined space, but they do not make this product a chimney liner.
Why it was selected: It matches the requested 6-inch flexible format and may be useful when the searcher means air ducting rather than stove exhaust. Its stated uses make the distinction especially important for comparison.
Important limitation: The provided product information does not identify this duct as suitable for wood-stove or chimney exhaust. Do not use general ventilation duct in place of a listed chimney liner or stove connector.
VIVOSUN 6-Inch Aluminum Duct With Clamps
Best for: Buyers connecting a 6-inch fan to an air-circulation or ventilation system. The listed 8-foot duct comes with two stainless steel clamps, and the product description says to match the duct diameter to the fan diameter for a close connection.
The duct uses a three-layer construction. The listing describes heavy-duty aluminum foil for its inner and outer layers and a PET thermoplastic middle layer intended to protect against cuts and tears. It also describes the foil layers as flame-retardant and the material as resistant to high temperature and corrosion.
Why it was selected: Its size, flexible form, and included clamps make it relevant to 6-inch duct searches. The product is specifically described for duct-fan systems and ventilation projects, not as a stove chimney liner.
Important limitation: A flame-retardant ventilation duct is not automatically rated for stove exhaust. The provided features do not identify it as a chimney liner, so avoid using it to vent a wood stove.
Imperial 6-Inch Adjustable Elbow
Best for: Buyers looking for a 6-inch elbow fitting rather than a full length of flexible pipe. The listing describes it as adjustable, easy to use, and durable, and states that it is manufactured in the United States.
Why it was selected: Elbows can be part of a venting layout, so this product may be relevant to someone comparing 6-inch pipe components. However, it is not a flexible liner and the supplied product details do not specify its material, application rating, or compatibility with a particular stove system.
Important limitation: Do not assume that an adjustable elbow is suitable for a wood stove simply because it is 6 inches. Check the product’s full specifications and the appliance and vent-system instructions before using it.
Buying Guide: How to Choose 6-Inch Flexible Stove Pipe
Do you need a chimney liner or ventilation duct?
Start by identifying what the pipe will carry. A wood stove sends hot combustion gases through a chimney system. That application calls for components specified for the appliance and chimney, not generic HVAC or dryer duct. In this product selection, the Fireside items are described as flexible stainless steel chimney liner kits. The VIVOSUN and AC Infinity items are described for ventilation and fan systems.
Do not rely on a product’s flexible construction or a phrase such as “flame-retardant” as proof that it is appropriate for stove exhaust. Those descriptions do not replace an explicit chimney-liner specification or the requirements in the stove and vent-system manuals.
How do you choose between a 15-foot and 20-foot liner?
Measure the intended route and consult the appliance and chimney instructions before choosing a length. The two Fireside kits have the same stated 6-inch diameter and similar listed kit components, but their listed lengths differ: one is 15 feet and the other is 20 feet. Select the length that fits the installation rather than assuming extra length is beneficial.
Confirm how the product’s stated length relates to the actual route, including any vertical connections and installation details. If measurements or requirements are uncertain, consult a qualified chimney professional.
Which material and construction details matter?
For the two chimney-liner kits, the supplied features specify 316 stainless steel, .006-inch thickness, 7-ply seams, and 10 corrugations. These are the relevant listed construction details to compare between the 15-foot and 20-foot versions. The product descriptions also list a top plate with rain cap and an appliance connector.
For ventilation duct, compare features such as length, layer construction, flexibility, and clamps only when the intended use is air circulation or a listed ventilation application. These characteristics do not establish suitability for a stove chimney.
What should you check before ordering?
- Diameter: Confirm that 6 inches matches the appliance and vent-system specifications. A nominal size match alone does not prove that all parts connect.
- Application: Verify that the product is identified for the intended use. A chimney liner, ventilation duct, and elbow are different component types.
- Length and route: Measure the installation and check the relevant instructions before choosing a 15-foot or 20-foot liner.
- Included parts: Compare whether the package includes items such as a top plate, rain cap, appliance connector, or clamps. The included parts differ by product type.
- Installation rules: Follow the appliance manufacturer’s instructions and applicable local requirements. Ask a qualified professional when the proper configuration is unclear.
When is an adjustable elbow a better choice?
An elbow is a fitting for a change in direction; it does not replace a long run of pipe or a flexible chimney liner. Consider the Imperial elbow only if you need that type of component and have verified its specifications for the intended system. The provided product details do not establish that it is suitable for a stove installation.
Frequently Asked Questions
Is flexible aluminum duct suitable for a wood stove?
The VIVOSUN and AC Infinity products are described as ventilation ducting, not chimney liners. The supplied information does not establish that either is suitable for wood-stove exhaust. Use only components specified for the appliance and venting system.
What is the difference between stove pipe and a chimney liner?
They refer to different parts or types of a venting arrangement. The products listed here include flexible chimney liner kits, ventilation ducts, and an elbow. Check the appliance instructions to determine the required component and system configuration rather than treating these product types as interchangeable.
Should I choose the 15-foot or 20-foot Fireside kit?
Choose based on the measured route and the installation requirements. The 15-foot and 20-foot kits share the listed 6-inch diameter and similar included components, but differ in length. Verify the required length before ordering.
Do the VIVOSUN clamps make its duct suitable for stove exhaust?
No. The clamps are listed as connection hardware for the ventilation duct. They do not establish that the duct itself is suitable for chimney or stove exhaust.
Can a 6-inch adjustable elbow replace flexible stove pipe?
No. An elbow is a direction-changing fitting, not a length of flexible pipe. Check the full product specifications and the vent-system instructions to determine whether a particular elbow is appropriate for the intended installation.