For most buyers, the DuraVent DuraPlus 6-Inch Vertical Installation Kit is the best overall starting point because it gives a familiar vertical-installation option, while the AllFuel HST Through-the-Attic Kit with Spark Arrestor Cap stands out for attic routes and added spark screening. The Selkirk Sport Stainless Steel Ceiling Support Kit is a more focused choice when ceiling support is the main need. The right 6 inch through the roof chimney kit depends on whether the pipe passes through a flat or cathedral ceiling, your roof pitch, and which chimney system your stove requires. Kits can differ in included support parts and cap styles, so a low-parts-count package may still leave key components to source separately. Read on for the full breakdown and a guide to matching the kit to your installation.
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Key Takeaways
- The route determines the shortlist: the lineup includes through-the-attic kits, cathedral-ceiling kits, and basic through-the-ceiling packages; these are not interchangeable just because they fit six-inch pipe.
- AllFuel HST offers the widest route-specific spread here: its options distinguish flat-top and spark-guard caps, attic and cathedral configurations, and different roof-pitch details.
- Cap choice is a real differentiator: several AllFuel HST kits include flat-top caps, while other versions specify spark guards or spark arrestors; match the cap to local rules and the chimney system.
- Support kits are not always complete chimney systems: the AllFuel HST Cathedral Ceiling Chimney Support Kit and Selkirk Sport ceiling support kit focus on support, so check what pipe, flashing, and termination parts remain necessary.
- Brand and system compatibility can outweigh the number of included parts: DuraVent, Selkirk, and AllFuel HST options should be compared against the installed chimney system’s specifications, not selected by diameter alone.
| DuraVent DuraPlus 6-Inch Vertical Installation Kit |  | Best for Manufactured-Home Installations | Brand: M&G DuraVent | Model: 6DP-KTUP | Chimney diameter: 6 inches | VIEW ON AMAZON | See Our Full Breakdown |
| Installation Chimney Kit 6in |  | Best for Lightweight Handling | Manufacturer: American Metal Products | Model: 6HS-RKS | Chimney size: 6 inches | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST Cathedral Ceiling Chimney Kit for 6-Inch Chimneys |  | Best for Steep-Roof Attic Runs | Model: HST6-CCK-RC05-11SCSRF02 | Chimney inner diameter: 6 inches | Compatible system: AllFuel HST Class-A double-wall chimney pipe | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST 6-Inch Through-the-Attic Chimney Kit with Flat-Top Cap |  | Best Certified Through-the-Attic Kit | Brand: AllFuel HST | Chimney pipe diameter: 6 inches | Pipe type and material: Class-A double wall; 304 stainless steel | VIEW ON AMAZON | See Our Full Breakdown |
| Duravent 6″ DuraPlus Basic Through-the-Ceiling Chimney Kit |  | Best for Low-Slope Roofs | Brand: Duravent | Model: SD9085 | Pipe diameter: 6 inches | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST 6-Inch Cathedral Ceiling Chimney Support Kit | | Best for Tall Cathedral-Ceiling Runs | Chimney diameter: 6 inches | Compatibility: AllFuel HST Class-A double-wall chimney pipe only | Maximum chimney height: 45 feet | VIEW ON AMAZON | See Our Full Breakdown |
| Selkirk Sport Stainless Steel 6″ Stove Pipe Ceiling Support Kit |  | Best for SureTemp System Buyers | Pipe diameter: 6 inches | Compatibility: Selkirk SureTemp pipe | Material: Stainless steel | VIEW ON AMAZON | See Our Full Breakdown |
| DuraVent DuraPlus 6-Inch Manufactured Home Chimney Kit |  | Best Complete Kit with Pipe Included | Inner diameter: 6 inches | Model: 6DP-KMFG | Included pipe: Two 24-inch galvanized DuraPlus chimney pipe sections | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST Cathedral Ceiling Chimney Kit with Flat Top Cap, 6-Inch |  | Best for a Straightforward Flat-Top Cap Setup | Chimney diameter: 6 inches | Chimney type: Class-A double-wall | Material: 304 stainless steel | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST Cathedral Ceiling Chimney Kit with Spark Guard Cap | | Best for Spark and Debris Screening | Inner chimney diameter: 6 inches | Maximum chimney length: 50 feet | Manufacturer: AllFuel HST | VIEW ON AMAZON | See Our Full Breakdown |
| Selkirk Corporation 6T-RTK 6 Chimney Kit |  | Best for Existing Selkirk SSII Systems | Model: 6T-RTK | Chimney compatibility: Selkirk SSII Type HT | Roof pitch range: 2/12–6/12 | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST Through-the-Attic Chimney Kit with Spark Arrestor Cap, 6-Inch |  | Best for Low- to Moderate-Pitch Roofs | Chimney diameter: 6 inches | Chimney type: 304 stainless steel Class-A double-wall | Ceiling support box: 11-inch square | VIEW ON AMAZON | See Our Full Breakdown |
| AllFuel HST Through The Attic Kit with Spark Guard Chimney Cap for 6-Inch Diameter 304 Stainless Steel Class-A Double Wall Chimney Pipe (24-Inch Square Ceiling Support Box, 7/12-12/12 Pitch Roof Flashing) |  | Best for Steep Roofs | Diameter: 6 inches | Material: 304 stainless steel | Chimney type: Class-A double-wall | VIEW ON AMAZON | See Our Full Breakdown |
More Details on Our Top Picks
DuraVent DuraPlus 6-Inch Vertical Installation Kit
For a vertical 6-inch installation where manufactured-home compatibility matters, this DuraVent kit has a useful combination of support and connection parts. Its 23-inch ceiling support box can also act as an attic insulation shield in a single-story setup, reducing the need to source that component separately. Two stove-pipe adapters add flexibility at the connection point, while the kit is designed for DuraPlus chimney systems. Compared with the DuraVent Basic Through-the-Ceiling Kit, this option is the more targeted choice for manufactured housing, but it does not include the same broadly described all-in-one component package. Plan for additional chimney pipe lengths: this kit is not a complete roof-to-terminal assembly on its own. I’d choose it when its specific installation fit is the priority, not when minimizing extra purchases is.
Pros:- Designed for manufactured-housing installations when used with additional pipe lengths
- 23-inch ceiling support box can double as an attic insulation shield in single-story installations
- Includes two stove-pipe adapters for added connection compatibility
Cons:- Additional chimney pipe lengths are required
- The product details do not specify roof flashing or a chimney cap as included components
- Its installation-specific design may be unnecessary for buyers without manufactured-housing requirements
Best for: Owners of manufactured homes planning a vertical DuraPlus chimney installation who need a support box and adapter flexibility.
Not ideal for: Buyers seeking a complete through-the-roof assembly with chimney pipe included, or anyone not using a compatible DuraPlus system.
- Brand:M&G DuraVent
- Model:6DP-KTUP
- Chimney diameter:6 inches
- Listed length:17 inches
- Material:Galvanized steel
- Included components:23-inch ceiling support box and two stove-pipe adapters
- Item weight:30.2 pounds
Our verdict“Choose this kit for a manufactured-home DuraPlus installation where the support box and two adapters fit your plan, and budget for separate pipe lengths.”
Installation Chimney Kit 6in
The American Metal Products kit stands out for buyers who value a lighter component package and want key roof and support hardware together. Its stainless-steel and galvanized-steel construction pairs corrosion resistance with structural parts, while a ceramic-fiber refractory blanket is specified for intermittent temperatures up to 2100°F. The listed contents include a cap, flashing, storm collar, ceiling support, and single-wall adapter, making it a more ready-to-assemble package than the DuraVent vertical kit, which calls out its support box and adapters but requires extra pipe. At 11.75 pounds, it is described as manageable for one-person installation, though the kit still requires careful handling and correct system matching. Its main limitation is scope: it is for 6-inch applications, and the provided details do not identify a compatible Class-A pipe brand or a supported chimney height.
Pros:- Includes cap, flashing, storm collar, ceiling support, and a single-wall adapter
- Combines corrosion-resistant stainless steel with galvanized steel
- Ceramic-fiber blanket is rated for intermittent temperatures up to 2100°F
- Listed item weight is 11.75 pounds, supporting easier one-person handling
Cons:- Limited to 6-inch chimney applications
- The supplied product details do not specify compatible chimney-pipe brands or maximum supported height
- Pipe lengths are not listed among the included components
Best for: Installers working alone who need a 6-inch kit with core roof, support, and connection components in one package.
Not ideal for: Buyers who need a specified long chimney run, brand-matched Class-A compatibility, or a kit with clearly stated system-height limits.
- Manufacturer:American Metal Products
- Model:6HS-RKS
- Chimney size:6 inches
- Item weight:11.75 pounds
- Construction materials:Stainless steel and galvanized steel
- Listed components:Stainless steel cap, flashing, storm collar, ceiling support, and single-wall adapter
Our verdict“Pick this when you want a relatively light 6-inch hardware kit with several installation parts included, but verify pipe compatibility and run requirements before buying.”
AllFuel HST Cathedral Ceiling Chimney Kit for 6-Inch Chimneys
This AllFuel HST kit is the clearest fit here for a cathedral-ceiling installation that also needs to pass through an attic and roof. It brings together a support box and trim, insulation shield, flashing, storm collars, stove-pipe adapter, and a spark-arrestor cap, covering more of the termination and roof hardware than the DuraVent vertical kit. Its listed roof-flashing range of 7/12 to 12/12 makes it especially relevant for steeper roof pitches, while the support system is specified for installations up to 45 feet. The tradeoff is brand lock-in: it connects to AllFuel HST Class-A double-wall pipe, and pipe lengths are sold separately. Compared with the AllFuel HST flat-top through-the-attic kit, this version is identified specifically for cathedral ceilings, so I’d match the support configuration to the ceiling structure rather than choose by cap alone.
Pros:- Includes support box, insulation shield, flashing, storm collars, adapter, and spark-arrestor cap
- Specified for chimney installations up to 45 feet
- Roof flashing range covers pitches from 7/12 to 12/12
- Designed for cathedral-ceiling installation configurations
Cons:- Chimney pipe lengths are sold separately
- Compatible only with AllFuel HST Class-A double-wall chimney pipe
- The listed flashing range does not cover lower roof pitches
Best for: Homeowners planning a cathedral-ceiling, through-attic 6-inch installation on a roof pitched from 7/12 to 12/12 using AllFuel HST pipe.
Not ideal for: Buyers with a different brand of Class-A pipe, a roof outside the stated pitch range, or a need for included chimney lengths.
- Model:HST6-CCK-RC05-11SCSRF02
- Chimney inner diameter:6 inches
- Compatible system:AllFuel HST Class-A double-wall chimney pipe
- Maximum supported chimney length:45 feet
- Roof flashing range:7/12 to 12/12
- Support box size:11 inches
- Included cap:Flat-top chimney cap with spark arrestor
Our verdict“Choose this for a steep-roof cathedral-ceiling route using AllFuel HST pipe, provided you source the pipe lengths separately.”
AllFuel HST 6-Inch Through-the-Attic Chimney Kit with Flat-Top Cap
For a single-story route through a ceiling, attic, and roof, this kit earns its place with a defined set of matching AllFuel HST components and UL103HT certification. It includes the stove-pipe adapter, 11-inch-square support box and trim, attic insulation shield, flashing, storm collars, and flat-top cap. The support box is specified for up to 45 feet of pipe, giving buyers a stated ceiling for planning a taller run. Unlike the American Metal Products kit, this one clearly identifies its Class-A system compatibility and roof-pitch range; that clarity comes with a firm brand boundary. It works only with AllFuel HST Class-A chimney pipe, and the pipe itself is not included. The 7/12–12/12 flashing range also makes it a poor fit for shallower roofs, so check pitch and system before choosing it.
Pros:- UL103HT certified
- Includes the main support, attic protection, flashing, storm collars, adapter, and cap components
- Support box is rated for up to 45 feet of chimney pipe
- 304 stainless-steel Class-A double-wall pipe system is specified
Cons:- Chimney pipe lengths are not included
- Compatible only with AllFuel HST Class-A chimney pipe
- Flashing is specified for 7/12–12/12 pitches, limiting use on shallower roofs
Best for: Homeowners building a single-story through-attic route who want a UL103HT-certified kit and are using AllFuel HST Class-A pipe.
Not ideal for: Installers with another brand of Class-A chimney pipe, a roof pitch below 7/12, or a preference for a kit that includes pipe lengths.
- Brand:AllFuel HST
- Chimney pipe diameter:6 inches
- Pipe type and material:Class-A double wall; 304 stainless steel
- Ceiling support box:11-inch square
- Roof flashing pitch:7/12–12/12
- Maximum supported chimney height:45 feet
- Certification:UL103HT
- Pipe included:No
Our verdict“This is a strong match for a certified AllFuel HST through-attic build on a steep roof, but not for cross-brand pipe or a complete pipe-included package.”
Duravent 6″ DuraPlus Basic Through-the-Ceiling Chimney Kit
The DuraPlus Basic kit is the most adaptable choice in this group for a low-slope roof, with adjustable flashing specified for pitches from 0/12 to 6/12. Its ceiling support box, cap, adapters, and ceramic-blanket-and-air-space insulation form a broad installation package for compatible wood, oil, coal, or gas appliances. Compared with the AllFuel HST through-the-attic kit, it gives up the stated 45-foot support capacity and UL103HT detail in the supplied specifications, but it covers roof pitches that the AllFuel kits do not. The system is built for 6-inch DuraPlus triple-wall pipe, and pipe lengths are sold separately; it supports up to 35 feet. At 28 pounds, it is also the heaviest handling proposition among these options with a listed weight, so plan for help during installation.
Pros:- Adjustable flashing covers roof pitches from 0/12 to 6/12
- Includes a ceiling support box, cap, and adapters
- Ceramic blanket and air-space insulation are specified
- Compatible with several listed appliance fuel types
Cons:- Chimney pipe is not included
- Limited to DuraPlus 6-inch triple-wall chimney pipe
- Supports up to 35 feet, less than the 45-foot rating listed for the AllFuel HST through-attic kits
- Listed item weight is 28 pounds, which may call for assistance during installation
Best for: Homeowners with a low-slope roof who need a 6-inch DuraPlus kit for a compatible wood, oil, coal, or gas appliance.
Not ideal for: Buyers with a roof pitch above 6/12, a non-DuraPlus chimney system, or a desired run longer than the stated 35-foot support limit.
- Brand:Duravent
- Model:SD9085
- Pipe diameter:6 inches
- Pipe system:DuraPlus triple-wall chimney pipe
- Maximum pipe support:35 feet
- Flashing pitch range:0/12 to 6/12
- Insulation type:Ceramic blanket and air space
- Item weight:28 pounds
Our verdict“Choose this DuraPlus kit for a low-slope roof and compatible appliance when a 35-foot support limit works and you can provide the pipe separately.”
AllFuel HST 6-Inch Cathedral Ceiling Chimney Support Kit
For a vaulted-ceiling installation where chimney height is a defining requirement, this AllFuel HST kit supports a run up to 45 feet and includes the main roof-penetration and ceiling-support components. Its spark-arrestor cap adds ember screening, a useful distinction from the AllFuel HST cathedral kit with a flat-top cap. The tradeoff is that neither kit includes chimney pipe, so you must source compatible AllFuel HST Class-A sections separately. This model is also limited to that chimney system; it is not a universal set of fittings. I’d rank it ahead of the flat-top-cap version when spark screening is a priority, but buyers who want pipe included should compare it with the DuraVent DuraPlus Manufactured Home Chimney Kit, which supplies pipe sections but serves a different system.
Pros:- Includes a ceiling support box with trim, roof flashing, storm collar, and stove-pipe adapter.
- Supports chimney runs up to 45 feet.
- UL103HT certified.
- Cap includes a spark arrestor.
Cons:- Chimney pipe lengths are sold separately.
- Compatible only with AllFuel HST Class-A double-wall chimney pipe.
Best for: Buyers installing AllFuel HST Class-A chimney through a cathedral or vaulted ceiling who need support for a tall run and want a spark-arrestor cap.
Not ideal for: Buyers seeking an all-in-one kit with chimney pipe, or anyone using a Class-A system other than AllFuel HST.
- Chimney diameter:6 inches
- Compatibility:AllFuel HST Class-A double-wall chimney pipe only
- Maximum chimney height:45 feet
- Included components:Stove-pipe adapter, ceiling support box with trim, roof flashing with storm collar, chimney cap with spark arrestor
- Certification:UL103HT
- Material and finish:Stainless steel, polished
- Compatible fuels:Wood, gas, coal, or oil
Our verdict“Choose this kit for a tall AllFuel HST cathedral-ceiling installation where a spark-arrestor cap matters more than included pipe.”
Selkirk Sport Stainless Steel 6″ Stove Pipe Ceiling Support Kit
This Selkirk kit is the system-specific choice for buyers already building with 6-inch SureTemp pipe. Its package lists a round top, storm collar, flashing, attic insulation shield, finish support, and smoke-pipe adapter, giving it a broader set of named installation parts than the AllFuel HST cathedral kits, which focus on a ceiling support box and roof components. That does not make it interchangeable: its fit is tied to SureTemp, and the supplied information identifies a flat-ceiling support design rather than a cathedral-ceiling configuration. I’d favor it over the AllFuel HST options when the existing system is SureTemp and the installation calls for the listed components; buyers planning a vaulted ceiling should confirm the required support arrangement before choosing it.
Pros:- Includes flashing, storm collar, attic insulation shield, finish support, and smoke-pipe adapter.
- Stainless-steel construction.
- Designed for 6-inch SureTemp pipe.
- UL-tested.
Cons:- System-specific fit limits use with other chimney brands.
- Buyers must verify the support configuration and whether additional components are needed for their installation.
Best for: Homeowners and installers using 6-inch Selkirk SureTemp pipe for a flat-ceiling stove, fireplace, or furnace installation.
Not ideal for: Buyers with AllFuel HST or DuraPlus pipe, or those who need a kit specifically configured for a cathedral or vaulted ceiling.
- Pipe diameter:6 inches
- Compatibility:Selkirk SureTemp pipe
- Material:Stainless steel
- Included components:Round top, storm collar, flashing, attic insulation shield, finish support, smoke-pipe adapter
- Certification:UL tested
- Model number:77924
- Product dimensions:30.2 x 24.5 x 19 inches
- Item weight:20.8 pounds
Our verdict“Pick this package when your project uses 6-inch SureTemp pipe and its flat-ceiling support arrangement matches the installation.”
DuraVent DuraPlus 6-Inch Manufactured Home Chimney Kit
Among these five options, this DuraVent kit stands apart by including two 24-inch chimney pipe sections along with its ceiling support box, adapters, flashing, storm collar, and cap. That makes it a more complete starting package than either AllFuel HST cathedral kit, which sells pipe separately, though the included sections may not cover the full height your installation requires. Its triple-wall construction combines a ceramic blanket with an air space, and the kit is specifically aimed at manufactured homes and cathedral-ceiling layouts. The 0/12–6/12 flashing pitch range narrows roof fit, and the 43-pound package calls for careful handling. Compared with the Selkirk SureTemp support kit, DuraPlus brings pipe and a stated fuel range, but you must verify system compatibility and roof pitch.
Pros:- Includes two 24-inch chimney pipe sections plus core support and roof components.
- Triple-wall construction combines a ceramic blanket and an air space.
- Designed for manufactured homes and cathedral-ceiling layouts.
- Lists compatibility with wood, oil, coal, gas, and biomass.
Cons:- The included pipe sections may not provide enough height for the complete installation.
- Flashing is specified for roof pitches from 0/12 to 6/12.
- At 43 pounds, the kit requires careful handling.
Best for: Manufactured-home owners or cathedral-ceiling installers who want a DuraPlus package that includes initial chimney pipe sections.
Not ideal for: Buyers whose roof pitch falls outside 0/12–6/12, or those who need a different chimney system or a longer included pipe run.
- Inner diameter:6 inches
- Model:6DP-KMFG
- Included pipe:Two 24-inch galvanized DuraPlus chimney pipe sections
- Ceiling support box:24-inch square with trim
- Roof flashing pitch:0/12–6/12
- Construction:Triple-wall with ceramic blanket and air space
- Continuous operating temperature:1,000°F flue gas operation
- Compatible fuels:Wood, oil, coal, gas, or biomass
- Weight:43 pounds
Our verdict“Choose this DuraPlus kit when you want pipe sections included and your manufactured-home or cathedral-ceiling setup matches its roof-pitch range.”
AllFuel HST Cathedral Ceiling Chimney Kit with Flat Top Cap, 6-Inch
This AllFuel HST kit suits a vaulted-ceiling project that calls for a flat-top cap and a 24-inch-square support box. It shares the other AllFuel HST cathedral kit’s 45-foot supported height and UL103HT certification, but its cap differs: the B0H5S9T47V kit specifies a spark-arrestor cap, making that version the clearer choice when ember screening is a priority. Here, the appeal is a simple listed package of stove-pipe adapter, ceiling support, trim, flashing, storm collar, and flat-top cap. Pipe is not included, and compatibility is restricted to AllFuel HST Class-A chimney. The stated flashing range is 1/12–6/12; buyers with a steeper roof or a chimney extending more than five feet above the roof should check whether additional support is needed.
Pros:- Includes a 24-inch-square ceiling support box with trim and key roof components.
- UL103HT certified.
- Supports chimney heights up to 45 feet.
- 304 stainless-steel construction.
Cons:- Chimney pipe lengths are sold separately.
- Compatible only with AllFuel HST Class-A chimney pipe.
- An extended roof support may be needed when the chimney extends more than five feet above the roof.
Best for: AllFuel HST Class-A owners fitting a cathedral or vaulted ceiling with a roof pitch from 1/12 to 6/12 who prefer a flat-top cap.
Not ideal for: Buyers who need pipe included, a spark-arrestor cap, compatibility with another chimney brand, or flashing for a roof outside the listed pitch range.
- Chimney diameter:6 inches
- Chimney type:Class-A double-wall
- Material:304 stainless steel
- Ceiling support box:24-inch square
- Roof flashing pitch:1/12–6/12
- Maximum supported chimney height:45 feet
- Included components:Stove-pipe adapter, ceiling support box with trim, roof flashing with storm collar, flat-top chimney cap
- Certification:UL103HT
- Pipe lengths:Sold separately
Our verdict“Choose this version for an AllFuel HST vaulted-ceiling installation with a matching roof pitch when a flat-top cap fits your needs.”
AllFuel HST Cathedral Ceiling Chimney Kit with Spark Guard Cap
This AllFuel HST option is a fit for buyers who want a spark-guard cap as part of a cathedral-ceiling kit. Its described components connect single-wall stove pipe to a double-wall Class-A chimney and include roof flashing and a storm collar, while the cap is intended to help keep out embers, weather, debris, and animals. Compared with the more fully itemized AllFuel HST kit B0H5S9T47V, this listing specifies a 50-foot maximum chimney length but gives fewer details about the support box and compatibility limits. I would verify the complete component list, pipe-system fit, and ceiling-versus-roof support method before ordering. Its five-pound listed weight also differs sharply from the larger packages, so weight alone should not be taken as proof that all required installation parts are present.
Pros:- Designed to connect single-wall stove pipe to double-wall Class-A chimney.
- Includes components for cathedral-ceiling installation.
- Flashing and storm collar help address the roof penetration.
- Spark-guard cap helps screen embers, weather, and debris.
Cons:- The listing provides limited detail about the included support components.
- Support requirements vary depending on whether the installation attaches to ceiling joists or the roof.
- Compatibility and roof-pitch details are not specified in the supplied product data.
Best for: Installers seeking an AllFuel HST cathedral-ceiling setup with a spark-guard cap and a stated maximum chimney length of 50 feet.
Not ideal for: Buyers who need a clearly itemized support-box package or detailed compatibility and roof-pitch specifications before purchase.
- Inner chimney diameter:6 inches
- Maximum chimney length:50 feet
- Manufacturer:AllFuel HST
- Model number:HST6-CCK-RC05-11SCSRF01
- Installation type:Cathedral-ceiling installation
- Chimney connection:Single-wall stove pipe to double-wall Class-A chimney
- Cap:Spark-guard cap
- Item weight:5 pounds
Our verdict“Consider this kit when spark screening and its stated 50-foot chimney limit suit your project, but confirm the included support parts and system fit first.”
Selkirk Corporation 6T-RTK 6 Chimney Kit
The Selkirk 6T-RTK is the focused choice here for buyers who already have a compatible SSII Type HT chimney and need the roof-end components for a standard installation. Its round top, storm collar, and flashing cover those basic needs without adding attic supports or other parts that may not fit your setup. Compared with the AllFuel HST Through-the-Attic Kit with Spark Arrestor Cap, this is a smaller, roof-focused package rather than a broader through-the-attic system. That makes it a simpler match for an existing Selkirk installation, but not a substitute for a complete chimney run kit. Its stated flashing range covers 2/12 to 6/12 roof pitches; buyers with steeper or flatter roofs, or a different chimney brand, should choose another option. Check compatibility and roof pitch before ordering.
Pros:- Includes a round top, storm collar, and roof flashing for a standard roof-end installation.
- Designed specifically for Selkirk SSII Type HT chimneys.
- Covers common roof pitches from 2/12 through 6/12.
Cons:- Compatibility is limited to Selkirk SSII Type HT chimneys.
- Does not include the broader support and attic components found in through-the-attic kits.
- Not specified for roof pitches below 2/12 or above 6/12.
Best for: Homeowners extending or completing a Selkirk SSII Type HT installation on a roof pitched from 2/12 to 6/12 who need only the listed roof components.
Not ideal for: Buyers building a complete through-the-attic chimney system, using another chimney brand, or working with a roof pitch outside the stated range.
- Model:6T-RTK
- Chimney compatibility:Selkirk SSII Type HT
- Roof pitch range:2/12–6/12
- Included component:Round top
- Included component:Storm collar
- Included component:Roof flashing
Our verdict“Choose this focused roof-component kit if your chimney is Selkirk SSII Type HT and your roof pitch falls within its stated range.”
AllFuel HST Through-the-Attic Chimney Kit with Spark Arrestor Cap, 6-Inch
For a single-story, through-the-attic installation on a low- or moderate-pitch roof, this AllFuel HST package gathers the main listed support, insulation, flashing, and termination parts in one kit. The 1/12–6/12 flashing range gives it broader low-slope coverage than the steeper-roof AllFuel HST kit with a 24-inch square support box, which is specified for 7/12–12/12 roofs. Its UL103HT certification covers the residential fuel types listed in the product data, while the spark-arrestor cap is included rather than left as a separate selection. The tradeoff is a brand-specific system: it works with AllFuel HST Class-A pipe only, and pipe lengths are sold separately. At up to 45 feet of supported pipe, it suits a substantial run, but buyers still need to plan and source that run themselves.
Pros:- Combines a ceiling support box, trim, insulation shield, flashing, and cap for a through-the-attic layout.
- Flashing is specified for roof pitches from 1/12 to 6/12.
- Supports chimney runs up to 45 feet.
- UL103HT certified for residential appliances fueled by wood, gas, coal, or oil.
Cons:- Compatible only with AllFuel HST Class-A chimney pipe.
- Chimney pipe lengths are sold separately.
- Its flashing range does not cover roofs steeper than 6/12.
Best for: Homeowners planning a single-story AllFuel HST 6-inch Class-A installation with attic space and a roof pitched from 1/12 to 6/12.
Not ideal for: Buyers with another brand of Class-A pipe, a roof pitch above 6/12, or a preference for a kit that includes chimney pipe lengths.
- Chimney diameter:6 inches
- Chimney type:304 stainless steel Class-A double-wall
- Ceiling support box:11-inch square
- Roof flashing pitch:1/12–6/12
- Maximum chimney height supported:45 feet
- Certification:UL103HT
- Compatibility:AllFuel HST Class-A chimney pipe only; pipe lengths sold separately
- Included components:Stove pipe adapter, ceiling support box with trim, attic insulation shield with storm collar, roof flashing with storm collar, chimney cap with spark arrestor
Our verdict“Pick this kit for an AllFuel HST attic installation on a low- or moderate-pitch roof, provided you will source the pipe separately.”
AllFuel HST Through The Attic Kit with Spark Guard Chimney Cap for 6-Inch Diameter 304 Stainless Steel Class-A Double Wall Chimney Pipe (24-Inch Square Ceiling Support Box, 7/12-12/12 Pitch Roof Flashing)
When a through-the-attic chimney must pass through a steep roof pitched 7/12–12/12, this AllFuel HST kit fills a gap left by the other AllFuel attic option in this group, whose flashing tops out at 6/12. The 24-inch square ceiling support box is the defining fit difference, so buyers should confirm that its larger footprint suits the ceiling layout before choosing it. The kit is specified for 6-inch 304 stainless steel Class-A double-wall pipe and supports runs up to 45 feet, with an insulation shield and spark-arrestor cap among the included parts. Like the low-pitch HST kit, it is brand-specific and does not include pipe lengths. Its steep-roof coverage is useful only if the roof pitch matches; it is not the flexible choice for a low-slope roof.
Pros:- Flashing is specified for steep roof pitches from 7/12 to 12/12.
- Includes a 24-inch square ceiling support box, insulation shield, and spark-arrestor cap.
- Supports chimney runs up to 45 feet.
- UL103HT certified for residential heating appliances.
Cons:- Compatible only with AllFuel HST chimney pipe.
- Pipe lengths must be purchased separately.
- The 24-inch square support box requires more ceiling space than the 11-inch square box in the other AllFuel attic kit.
Best for: Homeowners installing an AllFuel HST 6-inch chimney through an attic beneath a steep roof pitched from 7/12 to 12/12.
Not ideal for: Buyers with low- or moderate-pitch roofs, limited ceiling space for a 24-inch square support box, or chimney pipe from another brand.
- Diameter:6 inches
- Material:304 stainless steel
- Chimney type:Class-A double-wall
- Ceiling support box:24 inches square
- Roof flashing pitch:7/12–12/12
- Maximum chimney length supported:45 feet
- Certification:UL103HT
- Included components:Black stove pipe adapter, square ceiling support box, insulation shield, roof flashing, spark-arrestor cap
Our verdict“Choose this version when your roof is steep enough for its 7/12–12/12 flashing and its larger support box fits your ceiling plan.”
How We Picked
I compared these 13 kits around the decisions that most affect a roof installation: installation route, ceiling configuration, roof-pitch fit, included support components, and cap style. A kit designed for a cathedral ceiling serves a different job from an attic-route kit, and a support-only package should not be treated as a complete through-roof system. I also considered how clearly each product’s stated configuration helps a buyer identify its intended use.
The ranking favors options with a clearly defined route and useful configuration details, then distinguishes focused support kits and more specialized packages. The DuraVent DuraPlus Vertical Installation Kit leads as a broadly recognizable vertical-installation choice; AllFuel HST attic and cathedral options follow where their stated route or cap gives buyers a clearer match. Products with narrower roles rank lower for general use, not because their intended application is unhelpful. Before purchase, I would confirm the full parts list, chimney-system compatibility, roof pitch, and applicable installation requirements with the product documentation and a qualified installer.
Factors to Consider When Choosing 6 Inch Through The Roof Chimney Kit
Before choosing among these kits, I would map the installation from stove collar to roof termination rather than shop by the word “kit” alone. A package can cover only one part of that path, and the product names in this lineup reflect different ceiling and roof layouts. These checks help avoid buying a support assembly when you still need other system components.
Match the Kit to the Actual Pipe Route
Decide whether the chimney rises through a flat ceiling and attic or passes directly through a cathedral ceiling before comparing packages. An attic route and a cathedral route need different support arrangements, so a kit with the right six-inch diameter can still be wrong for the building. Trace the planned path and note where the ceiling support will sit, whether there is an attic space, and where the pipe exits the roof. A common mistake is to assume that “through-the-roof” describes one standard package. The lineup’s separate AllFuel HST attic and cathedral models show why route-specific naming matters. If the layout changes between floors or includes offsets, get the full system plan checked before ordering.
Confirm Chimney-System Compatibility
Six inches describes the nominal chimney diameter, not universal compatibility among brands or components. DuraVent DuraPlus, Selkirk, and AllFuel HST products should be treated as distinct systems unless their manufacturers explicitly approve a connection. Mixing parts based only on diameter can create fit, clearance, or listing problems. Check the stove outlet requirements, chimney model, connector parts, support components, and termination details together. Keep product labels and manuals available when comparing replacement parts or expanding an existing installation. If a stove or chimney is already in place, identify its exact system before buying a kit.
Read the Parts List, Not Just the Kit Name
Kit names can suggest a complete installation even when a package is centered on a single support or route component. Compare the listed contents against the whole run: chimney sections, ceiling support, roof flashing, storm collar, cap, and any connector pieces your layout calls for. The AllFuel HST Cathedral Ceiling Chimney Support Kit and Selkirk Sport ceiling support kit are examples where the word “support” signals a more focused role. Missing one required part can delay installation or prompt an incompatible substitute. I would use the manufacturer’s parts list and installation manual as the final checklist, not assumptions based on the product title. Ask the supplier or installer to identify any separately required components before placing an order.
Check Roof Pitch and Flashing Fit
Roof flashing must suit the roof’s slope and the chimney system; a generic fit should not be assumed. Measure the roof pitch at the planned penetration and compare it with the stated range for the flashing. One AllFuel HST attic-kit listing specifies flashing for a 7/12–12/12 pitch, a detail that can help buyers with steeper roofs but may not fit other slopes. A mismatch can complicate weatherproofing even if the pipe and support parts otherwise fit. Also account for roofing material and installation details rather than relying on a kit label alone. When the pitch falls outside a listed range, confirm an approved flashing option before buying.
Choose a Cap for the Site and Requirements
Flat-top caps, spark guards, and spark arrestor caps are distinct configurations, and the right choice depends on the appliance, location, and applicable rules. The AllFuel HST selections make this difference visible by offering both flat-top and spark-screened cap options across attic and cathedral kits. Do not assume a spark guard is required everywhere or that its presence automatically satisfies local requirements. Check the chimney maker’s instructions and local building or fire-safety guidance before settling on a cap. Also confirm that the chosen cap belongs to the same chimney system as the pipe. A cap is a small part of the purchase, but it can determine whether the selected kit fits the installation plan.
Plan Clearances, Access, and Installation Help
A route that looks simple on a floor plan still needs adequate clearance from combustible materials and access for assembly and inspection. Measure around the planned ceiling and roof penetrations, and check the chimney system’s stated clearance rules rather than estimating from the pipe’s outer appearance. Consider whether the installer can reach the support location and work safely at the roof exit. Paying for a more clearly route-specific kit can make sense when it reduces guesswork, but no package replaces a compliant layout. Beginners should favor a setup whose documentation matches their ceiling and roof arrangement and should ask a qualified installer to verify the plan. If any part of the path is uncertain, resolve that before choosing between cap styles or accessory options.
Frequently Asked Questions
Can I use any six-inch chimney kit with my six-inch stove outlet?
No. A matching nominal diameter does not prove that the stove connector and chimney components belong to compatible systems. Check the stove manual and chimney manufacturer’s specifications for approved connector parts, clearances, and installation details. The DuraVent, Selkirk, and AllFuel HST products in this roundup should not be mixed unless the manufacturers explicitly permit the combination. If you cannot identify the existing chimney system, confirm it with a qualified installer before ordering.
How do I decide between a through-the-attic kit and a cathedral-ceiling kit?
Choose based on the building layout, not on which kit sounds more complete. An attic-route kit is intended for a chimney path that passes through an attic space, while a cathedral-ceiling kit serves a sloped or vaulted ceiling arrangement. Locate the support point and map the pipe path before comparing included parts. The AllFuel HST lineup contains both types, making it especially important to select the configuration that matches the actual structure. If the ceiling design or roof exit is unusual, have the layout reviewed before purchase.
Is a chimney support kit enough to complete a roof installation?
Not necessarily. A support kit may provide a ceiling support component without supplying every chimney section, flashing, collar, cap, or connector required for the full run. The AllFuel HST Cathedral Ceiling Chimney Support Kit and Selkirk Sport ceiling support kit have focused support roles, so check their parts lists carefully. Compare the package contents with the manufacturer’s installation diagram from stove connection through roof termination. Confirm any separately required components before purchase to avoid delays or unapproved substitutions.
Should I choose a flat-top cap or a spark guard or arrestor cap?
That choice depends on the installation requirements, location, and chimney manufacturer’s instructions rather than appearance alone. This roundup includes AllFuel HST kits with flat-top caps and others that specify spark guards or spark arrestors, so compare the exact cap included in each package. Check local rules and the appliance documentation to learn whether a spark-screened cap is required or appropriate. Confirm that the cap is designed for the same chimney system as the rest of the kit. If the requirement is unclear, ask the local authority or installer before choosing.
What should I verify before ordering flashing for my roof?
Measure the roof pitch at the chimney location and match it to the flashing’s stated range. Also confirm that the flashing is intended for the chimney system and is suitable for the roof material and installation plan. One AllFuel HST attic-kit configuration lists a 7/12–12/12 pitch range, which shows why the product details matter. Do not assume that a flashing included in one kit will suit a shallower or steeper roof. If the pitch or roofing material falls outside the listed specifications, confirm an approved option with the manufacturer or installer.
Conclusion
For a broadly useful vertical-installation choice, I would start with the DuraVent DuraPlus 6-Inch Vertical Installation Kit as the best overall pick, while checking that its system matches the stove and planned route. The AllFuel HST Through-the-Attic Chimney Kit with Flat-Top Cap is my best value-style choice for buyers whose layout suits an attic route and who want a clearly specified cap configuration; compare its included parts before deciding. For a premium-style, more tailored selection, I would look to the AllFuel HST Through The Attic Kit with Spark Guard Chimney Cap when its specified roof-pitch and cap details match the site. Beginners should favor the kit whose route and documentation most closely match their ceiling and roof, then have the full parts list checked by an installer rather than buying by diameter alone. For cathedral ceilings, compare the AllFuel HST cathedral kits; for a focused support need, consider the AllFuel HST or Selkirk support options. The best choice is the one that fits the structure, chimney system, roof pitch, and local requirements as a complete installation plan.
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