Quick answer: Shasta Vent All-Fuel HT and DuraVent DuraTech are both double-wall, insulated Class A chimneys listed to UL 103 HT, and both require 2" of clearance to combustibles. The main differences:
- Steel: Shasta Vent uses 304 stainless steel for both walls. DuraTech uses 430 stainless.
- Sizes: DuraVent offers more diameters, including 5" and 7".
- Canada: DuraVent publishes Canadian listings. Shasta Vent doesn’t.
Pick Shasta Vent if you want 304 stainless inside and out in a 6" or 8" system. Pick DuraVent if you need an odd flue size or a Canadian listing.
Side-by-side comparison
The specs below are as each manufacturer publishes them, checked October 2026. Links to the sources are at the end of this article.
| Shasta Vent All-Fuel HT | DuraVent DuraTech (5"–8") | DuraVent DuraPlus | |
|---|---|---|---|
| Construction | Double wall, solid ceramic blanket insulation | Double wall, ceramic blanket insulation | Triple wall: ceramic blanket plus a ventilated air space |
| Inner wall | .020" 304 stainless | .020" 430 stainless | .016" 430 stainless |
| Outer wall | .020" 304 stainless | .016" 430 stainless or .021" galvalume | .016" 430 stainless or .018" galvanized |
| Clearance to combustibles | 2" | 2" | 2" |
| US listing | UL 103 HT (ETL, Intertek) | UL 103 HT | UL 103 HT |
| Canadian listing | None published | ULC S604 (stainless outer wall required in Canada) | Not listed in DuraVent’s catalog |
| Chimney-fire test | 2,100°F, three 10-minute tests | 2,100°F, three 10-minute tests | 2,100°F, three 10-minute tests |
| Diameters | 6", 8" | 5", 6", 7", 8" (10"–24" in a separate large-diameter line) | 6", 7", 8" |
| Joints | Twist-lock plus a locking band at every joint | Twist-lock; locking bands optional | Twist-lock |
| Elbows | 15° and 30°; max four elbows (two offsets) | 15° and 30°; max four elbows (two offsets) | 15° and 30°; max four elbows (two offsets) |
| Warranty | Limited lifetime: 100% replacement for 15 years, then 50% of MSRP. Fully warranted when professionally installed. | Limited lifetime: 100% of MSRP for 15 years, then 50%. No warranty unless installed by a qualified professional. Caps: 5 years. | Limited lifetime: 100% of MSRP for 15 years, then 50%. Fully warranted when professionally installed. Caps: 5 years. |
Where Shasta Vent stands out
304 stainless on both walls. Type 304 is an austenitic stainless steel and generally resists corrosion better than ferritic 430. That matters most on the inner wall, which faces moisture, creosote and acidic flue gases. DuraTech and DuraPlus use 430 for the inner wall. DuraVent prefers 430 because it expands less with heat. Both designs pass the same UL 103 HT tests. Our guide 304 vs. 430 Stainless Steel Chimney Pipe explains the trade-offs.
A heavier outer wall. Shasta Vent’s outer wall is .020" stainless. DuraTech’s stainless outer wall is .016".
A locking band on every joint. Each Shasta Vent joint twist-locks and is then secured with a locking band, so sections can’t be twisted apart by accident. DuraTech joints are designed to stay locked without bands, and DuraVent sells bands as an optional extra. Both approaches are listed. Ours builds the second lock into every joint.
Complete kits in both sizes. The Thru-The-Wall Kit and Thru-The-Ceiling Kit bundle the support components for the two most common installs, and our kits come in both 6" and 8". Add pipe (plus flashing for a roof install, and a firestop for each extra floor) and you’re set. Not sure which kit fits your house? See Through-the-Wall vs Through-the-Roof Chimney or Chimney Pipe Kits Explained.
Where DuraVent may be the better pick
You need a 5" or 7" flue, or something larger than 8". DuraTech comes in 5" through 8", and DuraVent publishes a separate line for 10" to 24". Shasta Vent makes 6" and 8" only. Never undersize a chimney to fit the pipe you’d like to buy. See What Happens If You Use the Wrong Chimney Pipe Size?
You’re installing in Canada. DuraVent lists DuraTech to ULC S604, and its Canada-only lines (DuraTech Canada and DuraTech Premium) to CAN/ULC-S629. Shasta Vent doesn’t publish a Canadian listing.
You want an air-cooled triple-wall design. DuraPlus combines insulation with a ventilated air space. See Do I Need a Double Wall or Triple Wall Chimney Pipe? and Insulated vs Air-Cooled Chimney Pipe.
You’d rather buy locally. DuraVent is widely stocked by hearth shops and home-improvement retailers, which helps if you want to pick parts up the same day.
You’re extending an existing DuraVent chimney. Stay with the brand that’s already installed, because listed chimney systems can’t be mixed.
Where they’re the same
- Both are factory-built chimneys listed to UL 103 HT and suitable for wood stoves.
- Both need a 2" air-space clearance to combustibles.
- Both passed the same 2,100°F chimney-fire test sequence.
- Both limit offsets to 30° from vertical, using 15° and 30° elbows, with a maximum of two offsets. See How Many Elbows Can a Chimney Have?
- Both tie full warranty coverage to a professional installation.
- Both must meet the 3-2-10 height rule and your local code.
Which should you buy?
| Your situation | Better fit |
|---|---|
| New 6" or 8" wood stove chimney, and you want 304 stainless inside and out | Shasta Vent |
| Standard through-the-wall or through-the-ceiling install from one kit, in 6" or 8" | Shasta Vent |
| 5", 7" or larger-diameter appliance | DuraVent |
| Install in Canada | DuraVent |
| Adding to an existing DuraVent chimney | DuraVent |
| Adding to an existing Shasta Vent chimney | Shasta Vent |
Not sure whether you need 6" or 8"? See What Size Chimney Pipe Do I Need for My Wood Stove? and 6 Inch vs 8 Inch Chimney Pipe.
Frequently asked questions
Are Shasta Vent and DuraVent chimney parts compatible?
No. Each brand’s chimney is tested and listed as its own system, so components can’t be mixed. Mixing brands can void the listing and the warranty and can create a fire hazard. If you’re extending or repairing a chimney, use the same brand that’s already installed.
Which is better for a wood stove, Shasta Vent or DuraVent?
Both are UL 103 HT listed for wood stoves, so either is a safe choice when installed correctly. The decision usually comes down to diameter, steel grade, whether you’re in Canada and what’s already installed. For the full buying checklist, see the Best Chimney Pipe for Wood Stove Buyer’s Guide.
Do Shasta Vent sections need locking bands?
Yes. Every joint is twist-locked and then secured with a locking band. No screws are needed. See How to Install a Class A Chimney Pipe for the full assembly steps.
Do I need a professional installer to keep the warranty?
For full coverage, yes, with either brand. Shasta Vent and DuraVent both define a professional as a licensed contractor with chimney experience, a CSIA-certified sweep, an NFI-certified specialist or a WETT-certified professional. Both also require annual inspection and cleaning by a certified sweep. Read each manufacturer’s warranty before you buy.
How long does Class A chimney pipe last?
That depends on the fuel, how hot you burn and how well the chimney is maintained. Annual cleaning and burning dry wood make the biggest difference. See How Long Does Chimney Pipe Last? and How to Clean a Class A Chimney Pipe Safely.
Shop Shasta Vent: Class A chimney pipe · complete kits · chimney planning guide.
Sources
Competitor specs as published by the manufacturer and checked October 19, 2026. Specs and warranty terms can change, so check the manufacturer before you buy.
- DuraVent DuraTech catalog (PDF)
- DuraVent DuraPlus catalog section (PDF)
- DuraVent DuraTech Canada catalog (PDF)
- DuraVent DuraTech Premium catalog (PDF)
- DuraVent limited lifetime warranty (PDF)
- Shasta Vent All-Fuel HT chimney pipe
Disclaimer: Shasta Vent blog articles share general information and common practices in the chimney and hearth industry. They are not installation instructions for your specific project, and they don’t replace professional advice. Building codes, appliance requirements and site conditions vary. Before you install, modify or repair a chimney, follow your appliance manufacturer’s instructions and the installation instructions that come with your chimney, check with your local building department, and consult a qualified professional such as a CSIA-certified chimney sweep, NFI-certified specialist or licensed installer.
Comparison disclaimer: DuraVent, DuraTech, DuraTech Canada, DuraTech Premium and DuraPlus are trademarks of DuraVent, Inc. All other product names and trademarks belong to their respective owners. Shasta Vent is not affiliated with, sponsored by or endorsed by DuraVent. Competitor information in this article comes from DuraVent’s publicly available catalogs, product literature and warranty documents, as checked on the date shown in the Sources section. Manufacturers can change specifications, listings and warranty terms at any time, so we can’t guarantee that this information is current or complete. Always confirm details directly with the manufacturer before you buy or install. The comparisons and recommendations here reflect Shasta Vent’s opinion based on that published information. If you believe anything in this article is inaccurate, contact us at info@shastavent.com and we’ll review it and correct it promptly.
