When venting a wood stove, fireplace, or other heating appliance in a home with a cathedral or vaulted ceiling, choosing a proper cathedral ceiling chimney kit is essential. This guide highlights five top options designed for AllFuel HST Class-A systems, plus complementary support hardware. Each kit includes the core components needed to install a safe, code-compliant venting run from the appliance to the roof. Consider ceiling box size, roof pitch compatibility, and whether the setup is single-story or includes attic space when selecting a kit.
style=”font-weight:bold;”>Summary of Chosen Products
| Product | Brand | Ceiling Box Size | Roof Pitch Range | Key Item |
|---|---|---|---|---|
| AllFuel HST Cathedral Ceiling Kit — 11″ Square | AllFuel HST | 11″ Square | 1/12–6/12 | Includes ceiling box, roof flashing, spark arrestor cap |
| AllFuel HST Cathedral Ceiling Kit — 24″ Square | AllFuel HST | 24″ Square | 1/12–6/12 | Large ceiling box for attic space compatibility |
| AllFuel HST Cathedral Ceiling Kit — Flat Top, 24″ Square | AllFuel HST | 24″ Square | 7/12–12/12 | Flat top cap and trim kit |
| AllFuel HST Cathedral Ceiling Kit — 36″ Square | AllFuel HST | 36″ Square | 1/12–6/12 | Expanded ceiling box for versatile layouts |
| Selkirk 6T-PCK Pitched Ceiling Support Kit | Metalbest | Standard pitched ceiling package | Not specified | Supports interior/exterior connection via insulated tee |
Note: Each product uses AllFuel HST Class-A double-wall chimney pipe compatibility and includes essential components such as stove pipe adapters, ceiling support boxes, and roof flashing with storm collars. Lengths of pipe are sold separately. The selections focus on single-story cathedral or vaulted ceiling contexts with limited attic space, common in many American homes.
AllFuel HST Cathedral Ceiling Kit — 11 Inch Square Box
The kit is designed for AllFuel HST Class-A double-wall chimney piping with compatible pipe lengths sold separately. It is best suited for single-story homes with a cathedral or vaulted ceiling and no attic space, though attic space can be accommodated with longer ceilings boxes. The package includes a black stove pipe adapter, a black ceiling support box with trim kit, a roof flashing with storm collar, and a chimney cap with spark arrestor. Maximum pipe length supported by the ceiling box is 45 feet. This option supports use with a wood stove, furnace, or fireplace, among other appliances.
AllFuel HST Cathedral Ceiling Kit — 24 Inch Square Box
This kit mirrors the 11″ variant but provides a larger 24″ ceiling support box, offering flexibility for installations with attic space or where a larger interface with the ceiling is preferred. It remains compatible exclusively with AllFuel HST Class-A double-wall chimney pipe and includes (1) black stove pipe adapter, (1) black ceiling support box with trim kit, (1) roof flashing with storm collar, (1) chimney cap with spark arrestor. Pipe lengths are still sold separately, allowing customization to fit the home’s height.
AllFuel HST Cathedral Ceiling Kit — 24 Inch Square, Flat Top
This version uses a flat top chimney cap and provides the same core components as the standard 24″ box kit, including the black stove pipe adapter, ceiling support box with trim kit, and roof flashing with storm collar. It is designed for single-story cathedral or vaulted ceilings and remains compatible only with AllFuel HST Class-A double-wall pipe. Pipe lengths are sold separately to accommodate different run distances.
AllFuel HST Cathedral Ceiling Kit — 11 Inch Square, Flat Top
This variant combines a compact 11″ square ceiling box with a flat top chimney cap, suitable where ceiling clearances are tight or a flat cap finish is preferred for aesthetics or clearance concerns. AllFuel HST Class-A double-wall pipe compatibility remains essential, and the package includes the standard accessories: stove pipe adapter, ceiling box with trim, roof flashing with storm collar, and spark arrestor-cap combination. Pipe lengths are sold separately for customization.
AllFuel HST Cathedral Ceiling Kit — 24 Inch Square, Spark Guard
This kit includes a 24″ square ceiling support box and a spark arrestor-equipped chimney cap for enhanced safety. It follows the same compatibility rules with AllFuel HST Class-A double-wall pipe and includes the standard trio of essential components: stove pipe adapter, ceiling box with trim kit, and roof flashing with storm collar. As with the other AllFuel options, pipe lengths are sold separately to fit the home’s exact height and layout.
AllFuel HST Cathedral Ceiling Kit — 36 Inch Square
Designed for larger cathedral or vaulted ceiling installations, this 36″ square ceiling box variant supports substantial chimney runs while maintaining safe clearance and smoke management. It is fully compatible with AllFuel HST Class-A double-wall pipe and comes with (1) black stove pipe adapter, (1) black ceiling support box with trim kit, (1) roof flashing with storm collar, and (1) chimney cap with spark arrestor. Pipe lengths are sold separately to tailor the system to the home’s height and layout.
Selkirk 6T-PCK Pitched Ceiling Support Kit
While not an AllFuel kit, the Selkirk 6T-PCK is a pitched ceiling support kit that is suitable for installations where the chimney penetrates through a wall or where a tee is used as an interior or exterior support. It includes a round top, storm collar, roof support package, finish collar, and a smoke pipe adapter. Braces fasten the system to the wall below the plate for chimneys penetrating through the wall, offering a versatile option for certain home configurations.
Hicarer 8″ Galvanized Roof Support Kit
This galvanized roof support kit from Hicarer is sized for convenience and compatibility with double-walled insulated chimney pipes. It includes bolts and nuts, and its compact 8-inch footprint balances strong support with space efficiency. The kit emphasizes durable galvanized steel construction, designed to withstand high temperatures, with a smooth finish to reduce burrs. It complements various chimney system layouts and works well as an auxiliary support option in cathedral- or vaulted-ceiling installations.
Buying Guide: Key Purchase Considerations
Chimney kit selection hinges on ceiling configuration, roof pitch, and the chimney pipe system in use. Consider these factors to choose the best option for a cathedral or vaulted ceiling:
- Ceiling box size and attic space: Larger boxes (24″–36″) accommodate attic spaces or longer vertical runs. For tight spaces with no attic, smaller boxes (11″–24″) may be preferable.
- Roof pitch compatibility: Kits specify pitch ranges (for example, 1/12–6/12 or 7/12–12/12). Match the pitch to your roof to ensure proper flashing and storm collar fit.
- Chimney system compatibility: Choose kits designed for AllFuel HST Class-A double-wall pipe if you’re using AllFuel. Mixing brands is generally not advised unless the kit explicitly supports it.
- Cap and spark arrestor: Caps with spark arrestors enhance safety by preventing ember egress. Flat-top and spark-guard variants offer different aesthetics and performance.
- Installation complexity: Larger kits with more components require careful alignment and sealant application at the roof line. Some kits come with trim kits for cleaner finishes.
- Localized codes and clearance: Verify local building codes for chimney clearances, flashing installation, and required permits before purchasing.
- Budget and piping length: Pipe lengths are sold separately in most kits. Plan the total run length to avoid under or over-buying pipe pieces.
Compared perspectives: AllFuel HST kits emphasize full class-A pipe compatibility and robust ceiling boxes suitable for single-story cathedral or vaulted ceilings. Selkirk and Hicarer provide alternatives focusing on pitched ceilings and practical support hardware, with varying box sizes and installation approaches. For homeowners prioritizing a seamless appearance and integrated spark protection, the AllFuel flat-top or spark-guard variants offer added features at comparable ease of installation.