Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
Buying a through-the-wall kit is mostly a fitment decision, not a brand decision — you need the right flue diameter, a wall thimble that actually matches your wall thickness, and a pipe run rated for the height you are building. Get those three right and the install goes smoothly. Get one wrong and you are making a second trip to the hardware store with a hole already open in your wall. This guide covers five complete kits that use insulated Class A chimney pipe (the double- or triple-wall pipe rated for wood stove flue temperatures) and exit horizontally through an exterior wall rather than straight up through the roof.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
None of these kits comes with the chimney pipe itself, so budget for that separately before you start cutting. Below you’ll find honest notes on weight, included hardware, and the install snags buyers actually run into with each wood stove pipe kits through the wall.
Top Picks
How To Choose A Wood Stove Pipe Kit Through the Wall
The mistake almost every first-timer makes is buying the kit before measuring the stove collar. The outlet on the back of your wood stove sets the flue diameter you need, and the kit has to match it exactly — an 8″ pipe does not adapt down to a 6″ stove with a shim and hope. Measure the collar, then buy the kit in that size.
Match the flue diameter to your stove, not to your wall hole
The 6″ or 8″ figure in these product names is the inner diameter of the chimney pipe — the channel the smoke actually travels through. The outside of an insulated pipe is noticeably fatter, because Class A pipe wraps insulation between an inner and outer wall. So a 6″ kit’s thimble still needs a larger hole through your framing than six inches. Cut the hole to the thimble’s own outside dimension, which the manufacturer publishes.
Check the thimble against your actual wall depth
An exterior wall with siding, sheathing, and framing is thicker than interior drywall, and the thimble has to span the whole assembly so the insulated pipe never touches combustible material. Before ordering, measure the full wall thickness at the exit point. If the thimble falls short, you are left filling a gap — and that gap is the one place you never want an improvised fix.
Know what the kit does not include
Read the included-components list line by line, because these kits vary enormously. The DuraPlus kit ships with a wall thimble, one 9 inch x 6 inch horizontal chimney pipe, a tee with a clean-out cap, a tee support, two wall straps, and a chimney cap. Others list only a support kit and leave the pipe, cap, and flashing to you. The vertical pipe that climbs to the cap is almost always bought separately, so plan that purchase into the job.
Think about how you will sweep it later
A tee with a clean-out cap is the detail that makes a through-the-wall job serviceable. The tee sits at the bottom of the outside vertical run and the cap unscrews so you can run a brush up from the ground. Without it, cleaning means working from the roof. Without a tee and cap, every chimney sweeping job means working from the roof instead of the ground.
Side-by-Side Comparison
| Model | Best For | Flue Size | Kit Weight | Key Hardware Included | Amazon |
|---|---|---|---|---|---|
| DuraVent DuraPlus Through-The-Wall Chimney Kit★ Best Overall | Most wood stove owners | 6 inches | 38.4 pounds | Thimble, tee, clean-out cap, tee support, 2 wall straps, cap | Amazon |
| 6″ Through the Wall Chimney Support Kit 208969Best for Tight Clearance | Tight exterior clearance | 6 inches | 27.7 pounds | Support kit with twist-lock joints | Amazon |
| Duravent DuraPlus 6in. Chimney Thru-Wall Kit | Code-conscious installs | 6 inches | — | Complete kit, single item | Amazon |
| Selkirk Metalbestos Selkirk-206622 | Straightforward assembly | 6 inches | — | Complete thru-wall kit | Amazon |
| Selkirk Metalbestos 208622 8-Inch Stove Thru Wall Kit | 8-inch stove outlets | 8 inches | 5.8 pounds | Thru-wall installation kit | Amazon |
Detailed Reviews
1. DuraVent DuraPlus Through-The-Wall Chimney Kit
Our pick — 4.5+★ from 550+ verified ratings; the strongest balance of quality and price.
The most complete parts list here — thimble, tee, clean-out cap, support, straps, and cap — but the outside mounting takes two people.
Rated for up to 40 feet of chimney pipe, this kit covers a two-story exterior run without pushing its limit. The DuraPlus kit supports up to 40 feet of chimney pipe, so a two-story exterior run is comfortably inside its rated limit rather than pushing the edge of it. That single number is why it takes the top spot: most homeowners are running far less than 40 feet, which means you are working well inside the rated envelope instead of at the ceiling of it.
What arrives is unusually complete. You get the wall thimble, one 9 inch x 6 inch horizontal chimney pipe, a tee with a clean-out cap, a tee support, two wall straps, and a chimney cap — the whole horizontal pass-through plus the bottom of the vertical run in one order. The pipe itself is not included, so the vertical stack up to the cap is still your purchase. The triple-wall construction and twist-lock joints are what the quality praise centers on; the sections lock together with a twist rather than screws, which keeps the seams tight without a fistful of fasteners. It weighs 38.4 pounds on the scale.
The honest catch is the install, and it is a two-part story. Threading the support and straps on the outside of the wall is a two-person job — holding a heavy assembly square against siding while you drive fasteners is not something to attempt solo on a ladder. And the instructions leave some buyers working it out as they go. Neither problem is fatal, and it is why this kit pairs best with someone who has done a wall penetration before or a helper who has. Plan the outside work for a calm day and a second set of hands, and the confusing part shrinks to reading ahead before you drill.
Where it earns its place
- Rated for up to 40 feet of chimney pipe, so tall exterior runs stay inside spec
- Ships with the thimble, tee, clean-out cap, tee support, two wall straps, and cap
- Triple-wall design with twist-lock joints for tight seams
- 6-inch flue size matches the most common wood stove outlet
What to plan around
- Chimney pipe is sold separately from the kit
- Mounting the support outside takes two people
- Instructions can read as vague on first pass
Go with this one if: you want the most complete parts list in a single order and your exterior run is tall.
Line up help for: the outside support mounting — this is not a solo ladder job at 38.4 pounds.
2. 6″ Through the Wall Chimney Support Kit 208969
A 27.7-pound six-inch support kit with twist-lock joints that seat by rotation instead of tools.
If your exit point is boxed in by a fence line, a deck, or a narrow side yard, the footprint matters as much as the parts list. This one is the smallest of the group at 18.3 x 20.3 x 16.3 inches, and it drops the scale at 27.7 pounds. Compare that to the DuraPlus at 38.4 pounds and you are handling a meaningfully lighter box end to end — easier to get up a ladder, easier to hold square with one hand while the other drives a screw.
Assembly is the other reason it lands here. Every joint uses a twist-lock connection, so sections seat with a rotation instead of a tool, and SuperVent lists the JSC model as safety tested and listed to applicable UL/ULC standards. That listing language is the piece a code inspector will want to see. The body is stainless steel, which is the material you want on an exterior wall where rain and snow sit against it all winter. At 27.7 pounds with tool-free twist-lock joints, it is the easier kit to position and assemble alone.
Here is the trade-off worth knowing before you click buy: this is a support kit, and the listing centers on the support, the twist-lock system, and the listing standard — not on a full parts manifest the way the DuraPlus spells out its tee, cap, and straps. Read the included-components section carefully against your plan. If you assumed a clean-out tee or a chimney cap was in the box and it is not, that is a separate order and a second wait.
The lighter box advantage: At 27.7 pounds against the DuraPlus’s 38.4 pounds, this is the friendlier kit to haul up and position alone.
Confirm the manifest first: The listing leans on the support and twist-lock joints rather than a detailed component list, so verify what ships before you build your parts plan around it.
Reach for this if: your exterior wall is tight and you want the lighter, tool-free option with a UL/ULC listing behind it.
Check before ordering: the exact components included, since the cap and tee are not spelled out on the listing.
3. Duravent DuraPlus 6in. Chimney Thru-Wall Kit
The kit to buy when a permit inspection is part of the job, since it carries ULC S609 and ULC/ORD C441 listing numbers.
Some buyers are installing to satisfy a permit, and that changes what counts as value. This DuraPlus kit is listed to ULC S609 and ULC/ORD C441, with the model designations CMH1439 and CMH1440 attached to that listing. In plain terms, those are the published safety standards a through-the-wall chimney assembly is measured against, and having the numbers on the box is what lets you hand a code officer documentation instead of a shrug. That is the whole case for this pick, and it is a strong one if your job is being inspected.
The build is stainless steel in a silver finish, with the model number 6DP-KOUT stamped to the 6-inch through-the-wall configuration. It is the same DuraPlus family as the top pick, so you are getting the same general design language — just in a listing that leads with the certification rather than the component run-down. For a homeowner in a jurisdiction that checks paperwork, that difference is the entire point.
The catch is that the certification is most of what the listing tells you. The included-components field is not detailed the way the top DuraPlus kit spells out its thimble, tee, straps, and cap, so compare that manifest line by line before you assume anything is in the box. If you need the paperwork trail, this is your pick. If you need a clearly documented parts list, the Best Overall kit is the safer read.
Buy this when: a permit or inspection is part of the job and you want the ULC listing numbers on hand.
Look at the top pick instead if: you would rather see every included part named before you order.
4. Selkirk Metalbestos Selkirk-206622
A single-unit stainless six-inch thru-wall kit whose sections fit together cleanly for a first wall penetration.
This is the kit for someone who has done a home project or two but has never cut a hole through an exterior wall for a chimney. The Selkirk 6T-TWK Complete Stove Thru Wall Kit comes as a single stainless-steel unit in the 6 IN. size under the Ultra-Temp style line, and the assembly is the part that stands out — the sections come together cleanly, and the stainless finish holds up on a wall that takes weather year round. It measures 19 x 24 x 24 inches.
Where the DuraPlus family asks you to sort out an unclear instruction sheet, this kit is the friendlier first-timer build. Compatibility with a 6-inch stove outlet is the strong point buyers look for, and the whole kit is built around that six-inch standard. If your stove collar measures six inches and your wall is a typical framed exterior assembly, this is a straightforward path from box to finished penetration.
Two things to weigh honestly. The value question draws divided opinion — some buyers feel the kit’s completeness justifies what it asks, others wanted more included for the money. And the condition on arrival is not guaranteed; the stainless can show dents on the fitting end, which is worth inspecting before you unwrap and cut. Neither issue sinks the kit, but both are reasons to open the box the day it lands rather than the morning of the install.
Why assembly wins the day: The pieces fit together cleanly, and the stainless-steel construction in the Ultra-Temp line means the exterior run holds up through weather. For a first wall penetration, that clean fit is the difference between an afternoon and a weekend.
The honest trade-off: Value is a matter of opinion, and dents on the fitting end do show up on the stainless. Inspect it immediately on arrival so any damage is caught before installation.
Best suited to: a first-timer who wants a six-inch stainless kit that assembles without a struggle.
Worth noting: open and inspect the stainless the day it arrives, since fitting-end dents can appear in transit.
5. Selkirk Metalbestos 208622 8-Inch Stove Thru Wall Kit
The only eight-inch thru-wall kit in this group, built for stoves with an eight-inch flue collar.
Most of the market builds around six-inch flue openings, and that is fine until you own a stove with an eight-inch collar. Then the entire shortlist above is wrong for you. This Selkirk kit is the 8-inch answer, a thru-the-wall installation kit built for a wall mount with an eight-inch flue, and it is the one pick here that solves a problem the others cannot touch.
The weight number is the eyebrow-raiser. This kit lists at 5.8 pounds, and set against the DuraPlus kit’s 38.4 pounds it is a radically lighter package — which tells you the components here are not the same heavy support-and-strap assembly the DuraPlus ships. Plan the support and the vertical run accordingly. The metal construction and wall-mount configuration are the core of it, and it is manufactured in China per the listing. For an eight-inch stove, though, the diameter fit is what gets you in the door in the first place.
Be clear-eyed about what you are buying. The listing describes a durable, easy-to-use thru-wall kit with an eight-inch flue, and it is the only eight-inch kit in this group. It is not the most detailed listing — the parts manifest is thin compared with the Best Overall kit’s full rundown. If your stove takes an eight-inch pipe, that is the trade you make, and it is worth confirming the full component list before you commit.
This is your kit if: your stove’s collar measures eight inches and the six-inch options are dead ends.
Worth verifying first: the specific parts in the box, since the listing gives less detail than the six-inch picks.
Know the Specs
Flue Diameter
The 6″ or 8″ in a kit name is the inner diameter of the chimney pipe — the passage the smoke travels through. It has to match your stove’s outlet collar exactly, since a smaller pipe on a larger stove collar chokes the draft and a larger pipe on a smaller collar will not seat. Measure the collar before you buy. Remember the insulated outer wall makes the actual pipe fatter than the flue size, so the hole through your framing is cut to the thimble’s outside dimension, not to the six or eight inches.
Wall Thimble and Clearance
The thimble is the sleeve that passes through the wall and keeps the hot pipe from touching framing, sheathing, or siding. It has to span the full wall thickness at your exit point, which on an exterior wall means siding plus sheathing plus framing. If the thimble falls short, you fill a gap, and that gap is the one spot where an improvised patch is never acceptable. Confirm the thimble’s span against your measured wall depth before the hole goes in.
Tee, Support, and Clean-Out Cap
The tee is the fitting at the bottom of the outside vertical run where the horizontal pipe turns upward. A tee support carries the weight of that vertical stack, and the clean-out cap on the tee lets you sweep the chimney from the ground with a brush instead of climbing the roof. A kit with a tee, a support, and a cap saves you buying those separately and makes future maintenance far easier.
Height Rating and Pipe Not Included
The height rating tells you how much chimney pipe the kit’s support is built to carry — the DuraPlus top pick is rated for up to 40 feet. That number matters for a two-story exterior run. Crucially, none of these kits includes the vertical pipe itself, so the stack from the tee up to the cap is a separate purchase. Budget the pipe and the flashing alongside the kit so you are not stuck mid-install waiting on a second order.
Common Questions
How do I know if I need a 6-inch or 8-inch through-the-wall kit?
Does the kit include the chimney pipe that goes up to the cap?
What is a wall thimble and why does it matter?
Can I install a through-the-wall kit by myself?
Do I need a tee with a clean-out cap on a through-the-wall install?
What does ULC listed mean on a chimney kit?
How much chimney pipe can these kits support?
Is a through-the-wall kit better than a straight-up roof kit?
What condition should the kit arrive in?
Can I use an 8-inch kit with a 6-inch stove?
The Bottom Line
For most wood stove owners working with a 6-inch outlet and a tall exterior run, the DuraVent DuraPlus Through-The-Wall Chimney Kit is the pick that earns its keep — it carries a 40-foot pipe rating and arrives with the thimble, tee, clean-out cap, support, straps, and cap all in one box. If your side yard is tight and you want the lighter, tool-free build, grab the 208969 support kit at 27.7 pounds. And if your stove collar measures 8 inches, the Selkirk 208622 is the one kit here that fits — no other option on this list serves an eight-inch flue.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of November 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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